This is an easy-to-make LED dimmer using RF remote control. The project is capable of driving a load up to 24W (2A X 12V LED). Any 12V single or 12V LED strip can be used. This is an open-source Arduino compatible hardware that has Atmega328 microcontroller, Potentiometer, MOSFET, 5V Regulator, 3.3V Regulator, NRF24L01 Radio modules, and few other components. The same PCB can be used for Transmitter and Receiver. LED D2 Power LED, LED D1 optional.
Arduino Pins Transmitter
NRF24L01 RF Module: GND>>GND, 3.3V>>3.3V Regulator, CE>> Arduino Digital Pin D9, CSN>> Arduino Digital Pin D10, MOSI>>Arduino Digital Pin D11, MISO>> Arduino Digital Pin D12, CSK>>Arduino Digital Pin D13
Potentiometer: Analog Pin A3
Arduino Pins Receiver
NRF24L01 RF Module: GND>>GND, 3.3V>>3.3V Regulator, CE>> Arduino Digital Pin D9, CSN>> Arduino Digital Pin D10, MOSI>>Arduino Digital Pin D11, MISO>> Arduino Digital Pin D12, CSK>>Arduino Digital Pin D13
LED Driver MOSFET Gate: Digital Pin D3
Note: PCB has dual options, it can be used for transmitter and receiver, for transmitter don’t install Q1 MOSFET and CN4 connector, for receiver don’t install potentiometer. Upload the related Arduino code that is available as a download.
Credits: This is a modified code, original author R Girish
Arduino Code
Arduino code for transmitter and receiver is available as a download, uploading code is easy, follow bellow link for more details:
The circuit presented here is a high frequency differential line receiver amplifier which has excellent common-mode rejection at its inputs. The project is an ideal solution for a receiver for composite video signals that are transmitted over long distance on twisted-pair cables like CAT5. Category 5 cables are very common in office settings and are extensively used for data transmission. These cables can also be used for the analog transmission of signals such as video. These long cables pick up noise from the environment they pass through. This noise does not favour one conductor over another and therefore is a common-mode signal. A receiver that rejects the common-mode signal on the cable can greatly enhance the signal-to-noise ratio performance of the link.
Transmitter and receiver work in tandem to convert a Composite Video signal to differential signal and transmit it over a single CAT-5 cable pair to a projector, monitor, or television. Ideal for digital signs, schools, temples, and trade shows. Line driver and line receiver projects can be used to transmit and receive composite video signals over 300 meters of category 5 (CAT-5) cable. The cable has an attenuation of approximately 20dB at 10Mhz for 300 meters.
Features
Operating Supply Dual +5V/-5V (+/-5V) @ 80mA
Compact Solution for Video Transmitter and Receiver over CAT-5 Twisted Cable
Pull-up resistors are used to avoid self-biasing or floating digital inputs. The pull-up resistor connects the digital input to the correct biasing level and eliminates the uncertainty caused by a floating input. A floating input creates a no input condition and may cause random biasing leading to incorrect logic or decision.
A logic gate is a basic building block of a digital circuit and they constitute complex Integrated Circuits (IC’s) and microcontrollers etc. having multiple inputs and outputs connected to external circuitry. These logic inputs and outputs can have only two states that are “0” and “1” or “LOW” and “HIGH”, respectively. These logic states represent two different voltage levels such as a logic “0” by a 0 Volts and logic “1” by a +5 Volts. These logic states are differentiated by different voltage levels or ranges depending upon the type of logic family. Any voltage below a certain level may lead to a “0” state and, on the other hand, any voltage above a certain level may lead to a “1” state.
The digital logic circuits make decisions based on only these two states and a voltage outside of differentiable logic levels could lead to uncertainty and the state of logic “0” or “1” cannot be sensed correctly. Such a condition could falsely trigger a digital circuit or logic gate.
Consider the following digital circuit, the recognizable voltage states for this digital gate are 0V and +5V for logic “LOW” and “HIGH”, respectively. The “X” & “Y” inputs of the digital circuit are connected to the ground (0V) through respective switches namely “a” &”‘b”. When the switch “a” is in close (ON) position then input “X” is connected to ground (0V) which is the correct voltage stage for logic “LOW”. Similarly, the closing of the switch “b” leads to the “LOW” logic state as well.
Figure 1: Inputs to a Digital Gate with open switches
However, when switch ‘a’ is open (OFF) then there is no voltage connected to the input “X” and an expected state would be a logic “HIGH”. But for achieving a logic “HIGH”, the input needs to be connected to +5V which does not seem to be a case here. The input “X” is said to be in the floating condition as it is not effectively connected to any voltage level. Apparently, such a condition may cause input “X” to a have “LOW” logic state but expectations were to have a “HIGH” logic state. Consequently, leading to a false decision at the output “Q”. Moreover, such a floating input is prone to the slightest interferences, and noises could make input change state. The worst could be leading to random shifting of states or oscillation.
Figure 2: Inputs to a Digital Gate with a switch close
The uncertainty, false-triggering, or oscillation in digital circuits due to floating or unused inputs can be prevented by connecting them to a certain voltage level appropriate to the circuit. The tying of inputs defines the logic states in different controlling states of inputs such as seen above in the open switch state where it was unused. In digital circuits, many digital gates or their inputs remain unused and require tying up or down using pull-up or pull-down, respectively. A number of unused inputs prescribing to the same logic state or condition can be tied together using a single pull-up or down resistor.
A pull-up resistor is used to connect an input of the “AND” or “NAND” gate to VCC. Whereas, a pull-down resistor is used to connect the input of the “OR” or ”NOR” gate to the Ground.
Why Pull-up Resistor?
Consider the following diagram of a two-switches case wherein instead of a floating state a second state is achieved by connecting inputs to +5V (a logic “HIGH” voltage level). Now, when switches are open, a logic “HIGH” state is present at the inputs. However, the closing of any switch would short-circuit the +5V with the Ground (0V) and causing an excessive current to flow. This could fry up the digital gate, input, and/ or circuity if there is no short-circuit protection is present. Instead, a pull-up resistor can be used between input and +5V to overcome this issue. The value of the pull-up resistor should be selected in such a way that when pulled-up allows a sufficient voltage drop to bring input voltage to logic “0”.
Figure 3: Inputs to a Digital Gate without pull-up resistors
Pull-up Resistor Application
In the following figure, a suitable pull-up resistor is used to pull up each input of the digital circuit. When any of the switches are open (OFF) then the respective input is connected to +5V via this pull-up resistor. The current flowing into the input is very small and, as such, causes a negligible voltage drop across the pull-up resistor. Eventually, a full +5V (nearly) gets applied at the input to bring the logic “HIGH” condition.
Figure 4: Inputs to a Digital Gate with pull-up resistors
Upon closing of any switch, the input is effectively connected to ground (0V) and a firm logic “LOW” condition is sensed by the logic gate/ circuit. However, this time, the VCC and Ground are not shorted due to the insertion of a pull-up resistor and a very little current flow through it. Now, both logic “HIGH” and “LOW” states are effectively achieved in the digital circuit using pull-up resistors. The output (Q) of the digital circuit will reflect the true picture of input states which was initially misleading due to floating inputs.
Calculation of Pull-up Resistor Value
As discussed in previous articles, the logic gates are characterized not only by the operating voltage but also by their current sinking and sourcing capabilities. Besides the two distinct voltage states presenting logic states “0” & “1”, there are maximum and minimum voltages defining voltage ranges for each state. In the following diagram, the voltage ranges for logic “HIGH” and “LOW” states are shown which are separated by an intermediate state.
Figure 5: The logical sensing voltage levels of TTL inputs
It is obvious from the figure that the input needs to have at least 2V to be considered as a logic “HIGH” and, on the other hand, an input should remain below (maximum) a 0.8V to be sensed as a logic “LOW”. In short for a TTL 74LS family, the logic “HIGH” state ranges from 2.0V to 5.0V and the logic “LOW” state from 0.8V to 0V.
The current flow between input and output of logic gates is dependent on the input logic level i.e. “0” or “1”. The logic “0” level makes the input as current-source as the current flows from input to logic “LOW”. Whereas, a logic “1” makes the input as current-sink and the current now flows towards the input from logic “HIGH”. When an input is at logic “HIGH” then the input acts as a ground and the current flow is considered positive (TTL74LS series have a typical value of 20uA). Likewise, at the logic “LOW” state, the current flows out of the TTL input and is considered negative having a value of -400uA for the TTL74S logic series.
Figure 6: A Digital Input acting as Sink or Source
When an input is pulled high it acts as a current sink and positive current flows into it. The TTL74S logic series has a rated positive current of 20uA and a minimum voltage threshold for a logic “1” of 2.0V. In the calculation of the pull-up resistor, the minimum voltage threshold is used to remain on the safest side.
The resistance value obtained above is the maximum value which will ensure a maximum voltage drop of 3V at a minimum 20uA sink current. The voltage is usually kept close to the upper limit of voltage (close to +5V) and this is done by reducing the pull-up resistance value. However, such a close margin can be easily overcome due to resistance tolerance or change in supply voltage, etc. Moreover, the power dissipation is more in low-value pull-up resistance due to an increase in current which should be avoided in any case. The suitable resistance value for a pull-up resistance ranges from 10kΩ to 100kΩ.
In a similar way, a number of inputs can be tied together using a single pull-up resistance rather than using pull-up resistance at each input, separately. In such a case, the current flowing through single pull-up resistance will number of inputs times the minimum positive (sink) current. In the following calculation, a pull-up resistance value is determined through which five inputs will be pulled up.
Pull-down Resistors
Just like a pull-up resistor, the pull-down resistor ties the input with an effective voltage level. However, contrary to a pull-up resistor, a pull-down resistor connects the input of a logic gate with the Ground (0V) or logic “0” state. The input becomes a current source and supplies current through a pull-down resistor towards the ground. The resistive value of a pull-down resistor for a TTL logic gate is more critical compared to the one used with a similar CMOS gate. It is because of TTL’s high current sourcing capability when its input is in a “LOW” state. The value of the pull-down resistor can be calculated in a similar fashion described above for a pull-up resistor. The TTL 74LS logic series requires a maximum of 0.8V in order to sense it as logic “0” and can deliver a minimum source current of 400uA. The pull-down resistor can be calculated using these parameters as follow:
This is the maximum pull-down resistor which ensures that voltage drop would be sufficient enough at the input to be sensed as logic “LOW”. Further increase in the pull-down resistor value will increase the voltage drop across the resistor and a voltage above 0.8V would be sensed as a logic “HIGH”. The good practice is to keep at least a 0.4V drop across the pull-down resistor.
A number of unused inputs can be connected together with a single pull-down resistor. A sample calculation for a fan-in of 10 is shown below:
The input can be pulled down without using a resistor but is often avoided to avoid excessive current flow or power loss. The pull-down resistor limits the source current flowing towards the ground.
Open-collector Outputs
The outputs of the logic gates are connected with other logic gates which may belong to the same or different logic family. If the output is connected to the same logic family such as TTL to TTL or CMOS to CMOS etc. then logic voltage levels match to produce a coherent result. However, when a connection between two different logic families is required or a load is to be connected to a different voltage level then a logic gate with open-collector output is used. The logic gates are manufactured with the open-collector circuitry at the output of the logic gate. The open-collector output is then derived from desired voltage level using a pull-up resistor. In contrary to the aforementioned pull-up or pull-down which were connected to the logic gate’s input, this pull-up is connected to the output of a logic gate. The term open-collector is used for TTL devices whereas open-drain for CMOS devices.
The open-collector or open-drain outputs are mostly used in inverters, drivers, or buffers where the output is connected to a different voltage level or to deliver high output current which may not be possible using normal logic outputs. For example, driving high current LEDs, relays, DC and servo motors, etc.
In the following figure, the open-collector output of a TTL 74LS01 is shown. In the absence of a pull-up resistor, it is eminent that the output of the logic gate will be either be connected to the ground when “HIGH” or floating when “LOW”. In order to avoid a floating condition, it is necessary to use a pull-up resistor at the output of an open-collector output. The pull-up resistor pulls the output to “HIGH” when the transistor is “OFF” and, upon switching to “ON”, the output becomes “LOW”.
Figure 7: TTL 74LS01 open-collector NAND Gate
Calculation of Open-Collector Pull-up Resistor Value
The value of the open-collector pull-up resistor depends upon the load which is driven through it and the current-sinking capability of the open-collector (transistor). When the transistor is in an “ON” state then current flows through the transistor and the value of the pull-up resistor must not exceed the current handling rating of the transistor. On the other hand, the load is supplied through this pull-up resistor when the transistor is in the “OFF” state. In this state, the pull-up resistor value should allow the required load current.
The output voltage levels are required to remain under permissible limits in order to be recognized as logic “LOW” or “HIGH”. For TTL 74LS logic family devices, the minimum “HIGH” logic voltage is 2.7V and the maximum “LOW” logic voltage is 0.5V. In short, the outputs of TTL 74LS devices are considered as logic “LOW” within 0 to 0.5 Volts and as logic “HIGH” within 2.7 to 5.0 Volts.
Consider the following calculation as an example for TTL NAND open-collector (74LS01):
This is the minimum resistance required to limit the current to 8mA which is the maximum current at the logic “LOW” state. In a similar way, the pull-up resistor value can be calculated through which an external load is connected. The external load usually requires high voltage or current and, for this purpose, normally hex inverter buffers are used. The TTL 74LS06 Hex Inverter Buffer uses 5V for biasing but its open-collector can support up to 30 Volts and a maximum of 40mA current at logic “LOW” level.
In the following example, a LED is driven from a 24 Volt supply using a 74LS06 Hex Inverter Buffer. The LED requires 10mA current at a 2.2V voltage drop. The 74LS06 Hex Buffer requires at least 0.1V at the input to sense the “LOW” state. The current limiting resistor value:
Figure 8: Driving a LED from 24V using open-collector output
Wired AND Logic
The open-collector outputs can be connected together through a single pull-up resistor. These open-collector outputs tied together forms the Wired AND logic because the outputs are AND’ed together just like they were connected to an AND gate.
Figure 9: Wired AND Gate example
Conclusion
The open-circuits/ floating inputs of digital logic gates may get self-bias leading to false triggering, random switching, or oscillation about logic states.
The pull-up or pull-down resistance is used to tie up a floating input to an effective logic level voltage.
The pull-up resistance ties up the inputs of AND and NAND gates with logic “HIGH” voltage.
The pull-down resistance ties the inputs of OR and NOR gates with the logic “LOW” voltage.
The logic states of “HIGH” and “LOW” levels are distinguished by two different voltage levels. For example, the TTL 74LS series used Ground (0) voltage as logic “LOW” and +5V as logic “HIGH” level.
Besides two distinctive voltages states, there are ranges of voltages that contribute to deciding logic levels. Like, TTL 74LHS Series, has a range from 0 to 0.8V for logic “LOW” and from 2.8 to 5.0V for logic “HIGH”.
The pull-up or down resistance value depends on the logic state of the input. At logic “LOW”, the input becomes a source (positive current) and a sink (negative current), otherwise (logic “HIGH).
The value of pull-down resistance is more critical compared to pull-up resistance because of low input voltage and high current.
The pull-up resistance usually ranges from 1kΩ to 100kΩ and mostly 10kΩ resistance is used in digital circuits. Whereas, the pull-down resistance ranges from 50Ω to 1kΩ.
The pull-up resistances are also used in conjunction with open open-collector (TTL) or open-drain (CMOS) outputs to drive outputs to desired logic voltage.
The open-collector or open-drain outputs are also used for loads requiring high currents such as relays, DC motors or LEDs, etc.
Multiple open-collector outputs connected together through an external pull-up resistance forms a Wired AND Logic.
ELECTRONIC ASSEMBLY W09616 0.84” Micro OLED Displays are 96 x 16 dot matrix displays with a 0.22mm pixel pitch that consume low power of 15mA. These OLED displays are capable of offering bright white content with unlimited viewing angles. The W09616 micro OLED displays come included with an SSD1306B controller and feature a 10µs fast response time even at -40°C extreme temperature. These 0.84” OLED graphic displays are ideally suitable for handheld applications.
The EA W096016-XALW incorporates an I²C bus interface and a 10.5mm FPC cable for direct spot welding to the circuit board. The EA W096016-XBLW is equipped with both an I²C bus and an SPI interface. This can be plugged into a 0.3mm ZIFF connector using a 34mm FPC cable with no welding.
Features
0.84” low-power OLED (15mA typical) displays
96×16 dots matrix displays
Bright white content with unlimited viewing angles
Analog Devices Inc. ADG7421F Dual Single-Pole/Single-Throw Switch features overvoltage protection, power-off protection, and overvoltage detection on the source pins. When no power supplies are present, the switch remains in the off condition, and the switch inputs are high impedance. When powered, if the analog input signal levels on the Sx pins exceed VDD or VSS by a threshold voltage, VT, the switch automatically turns off and the digital FF (fault flag) pin drops to a logic low to indicate a fault.
Features
Overvoltage fault protection up to ±60V on S1 and S2 pins
There’s more to AI than supercomputers and the big things that we often think about when AI is mentioned. Sometimes it is more about bringing AI technology to everyday objects around us and helping people augment what they have in their homes. This is why several companies now look for new ways life can be made easier and better through AI.
UDOO, an embedded computing specialist, is set to launch a crowdfunding campaign for a miniature flexible AI development board named UDOO Key. This microcontroller board combines a Raspberry Pi RP2040, an Espressif ESP32, and AI technology — launching for just $4 (for early backers).
“UDOO KEY is a fully programmable board combining Raspberry Pi RP2040 and ESP32 into a single powerful solution. It allows you to use either RP2040, ESP32 or both to build any AI projects on your terms,” the company writes.
The RP2040 microcontroller has a dual-core Arm Cortex-M0 processor clocked at 133MHz, 264kB of static RAM (SRAM), 8MB of QSPI external flash (4x the amount of the Raspberry Pi Pico) and 8x programmable input/output (PIO) state machines. The ESP32 on the other hand is powered by a dual-core Xtensa 32-bit LX6, 16MB flash memory and 8MB of pseudo-static RAM (PSRAM), and Wi-Fi & Bluetooth connectivity.
The RP2040 is located at the center while the ESP32 is located at the top of the board. You can either use them independently or separately depending on your needs, but the real power of the board lies in using the duo together. Both are fully programmable and compatible with Raspberry Pi Pico accessories and Olimex UEXT accessories.
Other features of the board include a USB Type-C port for data and power along with an expansion header that is based on the Olimex UEXT standard and the ESP32 microcontroller. The board also has an onboard microphone and a nine-axis IMU (inertial measurement unit).
The board is also said to be AI-capable, supporting different programming environments like tinyML and TensorFlow Lite, MicroPython, Arduino IDE and C/C++. The device is also said to support Clea — the AI platform for deploying AI models and applications over a fleet of IoT devices through over-the-air updates.
The board will cost $20 at retail price but early bird backers will have it at a whopping 80% discount which places it at just $4. This “once-in-a-lifetime” price will place the board at the same price level as a Raspberry Pi Pico.
No details yet on when the board will be launched, but you can sign up at the company’s website to get updates and also get notified when the project finally goes live.
Toit has everything you’ll need to build an IoT application, including firmware, cloud connectivity, a web-based console, and even a new programming language with Python-like syntax but considerably quicker execution speeds. But more importantly, Toit provides container-based development for the ESP32, allowing applications to be installed and updated independently from one another, as well as from the underlying firmware. This article highlights some of the key characteristics of this feature-rich platform that assist IoT developers in swiftly and easily developing their applications.
Innovative and Effective Multitasking on a $2 ESP32 MCU
Toit pushes a $2 ESP32 MCU to its boundaries in order to perform genuine multitasking. Toit allows you to deploy numerous applications on the same device in a much lighter and agile approach by dividing the firmware and apps code. As a result, you can freely and safely experiment with your code without risking bricking your device.
On the devices, your applications run in a separate environment from the system and from each other, making it possible to run numerous applications simultaneously. As a result, even if one of the applications goes down, the system will continue to function normally. The worst that can happen if a flaw gets into your code is that it crashes that one program. Working with Toit allows users to simply repair the bug and re-deploy the app over the air in seconds.
Connectivity Options in Toit
Connectivity works out of the box with Toit. You can directly connect to the built-in Wi-Fi of the ESP32. In addition, NB-IoT or LTE-M cellular modems are used by many users to connect to the cloud. In fact, there’s no need to connect the device to the PC via USB wire and wait for it to flash the code. After having installed Toit on a device, all communications between device and cloud happens over the air, whether your device is on your desk or located on the other side of the planet.
Unlike typical IoT systems, which combine all functionality into a single large piece of code, Toit configuration for connectivity is separated from application code. Intelligent scheduling of activities is made easy by Toit’s orchestration engine, which means that it is possible to schedule a configuration change or an update in just a few clicks, even for devices currently offline.
Toit applications are 40 to 100KB in size, and an update simply transmits patches to the previously installed version, so a Toit app update can be as minimal as 20KB. Being so, updates happen in seconds, and thus the chance of losing connectivity is quite low.
Even if the cellular connection is lost during the update, Toit will automatically resume the transfer once the connection is restored. Furthermore, the updates resume from the most recent data received, rather than from the beginning.
Toit applications focus solely on producing data and preserving it on the device, as Toit’s connectivity is separated from its application code. So, each time a device connects to the internet, the data is uploaded to the cloud. Hence, even on sluggish and unreliable internet connections, this makes a Toit device incredibly robust, accessible, and power-efficient.
Programming Made Easier with Toit
If you’ve ever attempted writing code for a microcontroller, you know how frustrating it can be. You program in C, and changing a single line of code takes minutes to re-deploy. The issue is that when it comes to microcontrollers, writing in low-level programming can be tedious. High-level languages, on the other hand, such as MicroPython, make it simple to write code but at the expense of execution speed.
Toit went above and beyond in creating a programming language exclusively for the Internet of Things. It is a modern object-oriented language, it provides you with a contemporary, memory-safe language. It integrates a cutting-edge editor with syntax highlighting, goto definitions, and auto completions. Within the Toit virtual machine, your code executes as one or more applications. Because your code runs in a sandboxed environment, the worst that can happen as a result of a defect is that your application crashes.
Through the GPIO pins on the ESP32, you can control any peripheral your plugin. The I2C, SPI, I2S, and UART protocols are all available for use. In addition, Toit’s package manager provides drivers for a variety of regularly used peripherals such as sensors and motors, and if you don’t have one, their engineering team is available to assist you in writing one.
Easy to use APIs and Secure Communication
You don’t have to feel obligated to use their console and they don’t want their command-line tools to make you feel restricted. “You are in full control of your devices and everything you can do with the Toit platform, you can do through our API. It is easy to integrate our platform into your products and turn your device fleet fully programmable”, says Toit. Toit’s gRPC-based APIs give users the liberty to achieve whatever they want with the platform.
IoT is all about data and Toit’s APIs are built to provide you complete programmatic control over your devices and to make ingesting acquired data into your own backend as simple as possible.
Using contemporary public-key encryption, all communication between the device and the cloud is encrypted end-to-end. Each device has its own cryptographically secure identification, allowing you to pinpoint the source of all collected data.
To Write And Deploy Applications, Use The Visual Studio Code Extension
Toit introduced a Visual Studio Code extension that does much more than merely highlighting the code with the introduction of a new programming language. In the built-in terminal, users may run code snippets, deploy programs, and monitor the output. The extension also displays a list of devices and apps that are currently operating in the sidebar. This Visual Studio Code extension speeds up development. We loved the fact that we could execute the software directly on the device, just as we would a computer program. There is no need to worry about picking a port, flashing, or any other issues that can arise while dealing with C++ programs. Overall, this VS code extension provides all of the fundamental functions of the web-based interface, as well as additional app deployment options.
Getting Started with Toit
To flash the firmware, first-time users will require an ESP32 board and a USB cable. Users can now start creating even without installing anything on their PCs, thanks to the support for flashing from the browser via Web serial. The provisioning of your device will just take a few minutes, and you’ll be up and running in no time. You can try out anything on the device once it has been provisioned, as long as it is connected to the internet as all the communications between the devices and cloud will happen over the air.
The console includes a built-in code editor that allows you to write, run, and monitor code on your device using timestamps. This is a terrific approach to try something new and enhance your software quickly. After your program is up and running, you can install it as a long-running application on your device. The app’s output, if any, will be logged and may be viewed in the console’s LOGS section. Toit’s excellent multitasking abilities convert an ESP32 into a whole computer. You can now easily commence your journey with Toit by referring to their quick-start guide.
Leetop has introduced a high-performance, interface-rich NVIDIA Jetson Nano / Xavier NX compatible carrier board named Leetop A205.
Leetop A205 comes with HDMI 2.0 output, GbE, microSD card, USB3.0, USB 2.0, M.2 key E Wifi / BT, M.2 key M, SATA, CSI camera, RS232, SD card, CAN, I2C, I2S, and fans, just to mention a few.
According to the company, the carrier board works only with an NVIDIA Jetson Nano or an NVIDIA Xavier NX module and is targeted at environments with strict requirements and complicated real-time vision computation.
“With the NVIDIA Jetson Nano/Xavier NX Module assembled, it could support NVIDIA JetPack, which includes a board support package (BSP), Linux OS, NVIDIA CUDA®, cuDNN, and TensorRT™ software libraries for deep learning, computer vision, GPU computing, multimedia processing, and much more.”
The Leetop A205 board also supports 4G communication and is perfect for complicated AI graphical applications such as Automated Optical Inspection, In Video Action, Robot control, Drone, 3D modeling etc. There’s a consideration for better heat dissipation as the board also comes with up to 3 fans interfaces.
Features and Specifications of the A205 Include:
SoMs: NVIDIA Jetson Nano and Jetson Xavier NX
5x SATA ports
1x MicroSD card slot
2x HDMI 2.0 up to 4Kp60
6x MIPI CSI camera connectors
3.5mm audio jack
2x microphone headers
2x speaker (1W) header
2x Gigabit Ethernet RJ45 port
Optional WiFi and Bluetooth via 4-pin USB header or M.2 Key E socket
4x USB 3.0 Type-A ports
1x USB 2.0 Type-C OTG port
M.2 Key E socket
1x SPI, 2x I2C , 2x GPIO, 1x UART, 1x CAN
I/O voltage: 3.3V
2x fan headers (12V/5V)
1x 5V PWM fan header
System control
Power control
LED
RTC with 3V coin-cell battery (not included)
Power supply: 13V to 19V DC input up to 8A via the 2-pin yellow connector
Dimensions: 170 mm x 100mm
Temperature Range: -25°C to +80°C
Application areas include:
Industrial automation
Robotics
Healthcare
Computer vision
Smart City, and,
Smart Office
The company also introduced a Leetop A203 that is smaller than the A205 and about the size of the modules themselves. This A203 provides less functionality but can be used for space-constrained AI or IoT applications. It offers Gigabit Ethernet, HDMI output, USB 3.0/2.0 ports, a camera interface, and an M.2 slot for optional WiFi and Bluetooth connectivity. Board dimension is 87mm x 52mm x 26mm while weight is 57 grams.
Both boards are available for pre-order for $349(A205) and $179(A203). None of them however comes with a Jetson module, so you may need to place a separate order for it (this is also available for $129).
Shipping for the A205 is expected to commence by October 21 while the A203, by September 30 this year.
This tutorial will show how to transfer files wirelessly over the Bluetooth Low Energy protocol. We will use two BleuIO dongles for this project—one for sending and another one for receiving. The sender dongle will be in central mode, while the receiver dongle will be in peripheral mode.
First, connect two BleuIO dongles to your computer.
Note down the COM port for each dongle. You can find the port using device manager.
Try to find receiver dongle MAC id. To do that, start advertising your receiver dongle and note down the MAC id. Follow the video if you need more details on how to do it.
Open file_recieve.py and file_transfer.py files. Update COM port and MAC id where necessary.
Set the file type that you are expecting to receive. For example, if you are expecting a jpg file, change file_name on file_recieve.py to result.jpg, and for a text file, you can rename it to result.txt
Keep the file in the same directory with file_transfer.py and change the file name accordingly.
Now run the script file_recieve.py using a terminal. It will start advertising and will be ready to receive.
Now run the file_transfer.py script.
Once both the dongles are connected, you will be asked to send the file from the file transfer script.
The receiver dongle will give you a confirmation once received, and you will find the file stored in the same folder with the receiver script.
Finally, you can check if you received the file correctly by running a checksum.
Please follow the video if you have difficulty in understanding.
Fibocom, a global leading provider of IoT (Internet of Things) wireless solutions and wireless communication modules, announces that its 5G module FG360-NA has been successfully certified by a US major carrier. The module is now qualified to provide wireless connection services under the US 5G network, which accelerate the deployment of 5G FWA (Fixed Wireless Access) in the US market.
The 4G and 5G frequency bands in North America are diverse, the CA and ENDC of which are complex, and operator certification requirements are strict. Having overcome numerous difficulties and challenges, Fibocom’s R&D and certification department has completed relevant regulations and carrier certification in 4 months. With the certification, the Fibocom FG360-NA module is able to empower a wide range of IoT applications by leveraging the high bandwidth and low latency 5G network, including FWA (CPE, ODU, gateway, router), MIFI, etc. Specially, the module supports full FWA software turnkey, realizing seamless plug-in and easy use.
“We are proud to see our 5G module FG360-NA receiving the certificate. The module is now fully capable to be deployed in the US IoT market, boosting the commercialization of 5G FWA at scale. Fibocom will continue to enable industry digital transformation with our advanced 5G technology.” said Gene Santana, VP of Overseas Carriers Certification Dept., Fibocom.
According to a recent GSA report, the numbers and types of 5G devices announced and launched has increased rapidly, among which FWA CPE account for the second largest proportion. 5G FWA, with an average marketed speeds of 648 Mbps, has become one of the main options for operators worldwide to develop home broadband services. Fibocom is optimistic about the development potential of 5G FWA worldwide, and its 5G module FG360-NA has taken the lead in the 5G FWA market, supporting major overseas 5G Sub-6 and 4G frequency bands such as n66, n71, n77 and n78.
Based on the World’s 1st FWA CPE customized 5G SOC chipset, MediaTek T750, Fibocom’s FG360-NA module supports 5G NR Sub-6 band with up to 4.67 Gbps on the downlink and 1.25 Gbps on the uplink theoretically, enabling exciting 5G speed experience. It is worth noting that, integrated with MediaTek T750, the FG360-NA module has high integration and excellent performance that cover global main frequency band & ENDC (with NA and EAU Skus). Supporting 5G standalone network (SA) and non-standalone (NSA) network architectures, the module is also backward compatible with LTE/WCDMA network standards, which helps to reduce investment complexity in the initial stage of 5G construction.
Coming with a built-in quad-core & 2 GHz ARM Cortex-A55 CPU, Fibocom’s FG360-NA module supports 5G Sub-6GHz 2CC CA (Carrier Aggregation) 200MHz frequency to improve the utilization of spectrum resources and ensure an extended 5G coverage. In addition, supporting Wi-Fi 6 AX1800/ AX3600 (Main stream)/ AX4200/ AX6000 configuration, the FG360-NA module allows end devices to enjoy the full benefits of high-speed 5G + Wi-Fi 6 connectivity. The module also supports GNSS, including GPS, GLONASS, Beidou, Galileo and QZSS.
The Fibocom 5G module FG360-NA has a rich extension of interfaces including 2.5Gbps SGMII, USB 3.1/3.0/2.0, PCIe 3.0, GPIO, I2S, UIM and so on. At present, Fibocom’s FG360 module series has been globally certified by FCC/ CE/ PTCRB, and the commercial samples of FG360 are ready for massive production.
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