The project presented here is an SPI programable Gain Amplifier using MAX9939. The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisition applications. It features SPI-programmable differential gains from 0.2V/Vto 157V/V, input offset-voltage compensation, and an output amplifier that can be configured either as a high-order active filter or to provide a differential output.
The PGA is optimized for high-signal bandwidth and its gain can be programmed to be 0.2V/V, 1V/V, 10V/V, 20V/V, 30V/V, 40V/V, 60V/V, 80V/V, 119V/V, and 157V/V. Precision resistor matching provides extremely low gain tempco and high CMRR. Although the MAX9939 operates from a single supply VCC between 2.9V to 5.5V, it can process signals both above and below ground due to the use of an input level-shifting amplifier stage. Furthermore, its inputs are protected to ±16V, allowing it to withstand fault conditions and signal overranges. The output amplifier is designed for high bandwidth and low-bias currents, making it ideal for use in multiple-feedback active filter topologies that offer much higher Qs and stopband attenuation than Sallen-Key architectures. The MAX9939 draws 3.4mA of quiescent supply current at 5V, and includes a software-programmable shutdown mode that reduces its supply current to only 13µA.
Note: This is a general-purpose SPI programable gain amplifier, all components are user-defined, capacitors and resistors value as per application. Refer to the datasheet of the chip for more information.
Key Features
Operating Power Supply 3V to 5V DC
SPI-Programmable Gains: 0.2V/V to 157V/V
Extremely Low Gain Tempco
Integrated Amplifier for R/C Programmable Active Filter
The switching theory uses switches in order to understand the operation and functioning of digital logic gates and circuits. The switching theory helps in developing better theoretical knowledge and concepts of digital logic circuits involving logical inputs producing a specific relational logical output. As it has already been discussed that Boolean data type has only two distinctive states i.e. “0” or “1”. They are also referred to as “LOW” and “HIGH” or “OFF” and “ON”, respectively. Digital logic input and output can have only these two states. A switch or an electromechanical contact of a relay also has only two distinctive states i.e. “OFF” or “ON”. Therefore, a digital logic input or output can be represented by a physical switch, and Boolean Algebra laws, rules, and theorems can be applied to them. The Boolean expressions can be expressed by switching theory which eases the understanding of digital logic gates.
The understanding of digital logic gates is essential when dealing with complex logic circuits or microprocessors. The digital logic gates are the basic building blocks of combinational and sequential logic circuits. The combinational logic circuits are dependent on only external inputs or signals applied to them. Whereas, the sequential logic circuits are dependent on the present state, its output, and externally applied inputs.
Theory of a Switch
A switch can be thought of as a wall switch which is normally found in households to turn “ON” or “OFF” a light/ lamp. A switch can also be an electromechanical contact of a relay to allow the flow of current in either direction.
A Normally-open Switch
In the following circuit, a voltage source is connected to a lamp through a normally-open switch. Under normal conditions i.e. the switch is open, the electric path between the voltage source and the lamp is not established and no current flows. The lamp does not glow or illuminate. However, when the switch is pressed i.e. switch closed, the electric path between the voltage source and the lamp gets established. A current flows to the lamp from the voltage source through the switch and illuminates the lamp.
Figure 1: A normally-open switch
The switch positions i.e. “OFF/ OPEN” and “ON/ CLOSED” are equivalent to Boolean states of “0” and “1”, respectively. Likewise, lamp states of “OFF” and “ON” by “0” and “1”, respectively. The switch can be represented by an input (A) and lamp as an output (L).
When the switch/ input (A) is open “0” then the lamp/ output (L) is also “0” or not illuminated. Likewise, when the switch/ input (A) is closed “1” then the lamp/ output is “1” or illuminated. This can be illustrated by the equivalent switching truth table which is shown below.
From the above table, the switch equals lamp i.e. A = L which means that when the switch is “OFF” the lamp will also be “OFF” and this phenomenon holds under the “ON” state of the switch. The switch used in the above circuit is normally-open and it has to physically make a contact to be considered closed. The other type of switch is normally closed which is opposite of normally open and has to physically break the contact in order to be considered open.
A Normally-closed Switch
In the following circuit, a voltage source is connected to a lamp through a normally-closed switch. Under normal conditions i.e. switch is closed, the electric path between voltage source and lamp is established and current flows to illuminate the lamp. However, when the switch is pressed i.e. switch open, the electric path between the voltage source and lamp breaks. The current flow along with the illumination of the lamp stops.
Figure 2: A normally-closed switch
Here, the switch positions i.e. “OFF/ OPEN” and “ON/ CLOSED” are equivalent to Boolean states of “1” and “0”, respectively.
The above electric circuit can be described as when the switch/ input (A) is open “1” then lamp/ output (L) is “0” (not illuminated). Likewise, when the switch/ input (A) is closed “0” then the lamp/ output is “1” (illuminated). This can be illustrated by the equivalent switching truth table which is shown below.
From the above table, the switch and lamp states are opposite to each other which means that when the switch is “OFF” the lamp will be “ON” and, likewise, when the switch is “ON” the lamp will be “OFF”. The normally-closed switch is performing the inversion function in terms of switching theory.
Series Switches Case
In the above circuit, a single switch is used to control the lamp operation. The single switch allowed the flow of current to the lamp in order to illuminate it. The state of a single switch is equivalent to lamp state i.e. both are “OFF” or “ON” at the same time. The addition of a switch in series with the first switch leads to a different state of affairs.
Consider the following circuit having a voltage source, a lamp, and two series switches. The switches can be labeled as inputs “A” and “B”. There open/ off states are represented by “0” and closed/ on states by “1”. The two switches make a total of four combinations to control the lamp. The first combination is A=0 & B=0, the second combination is A=0 & B=1, the third combination is A=1 & B=0, and the fourth combination is A=1 & B=1. The lamp has four states corresponding to each combination of A and B. As obvious from physical switches in series, the current will flow from the voltage source to the lamp when both switches are closed or at a logical “1” state. The series switches’ truth table is shown below:
Figure 3: A series switches case
From the following truth table, it is clear that when both switches/ inputs are closed or at “1” logical state then the lamp illuminates (state of “1”). When either of the switches is at the “0” logical state, the lamp is at the “0” state. This leads to L = A and B expression. In Boolean Algebra, it is an AND logical operation which is denoted by a single dot (.) between the input variables i.e. L=A.B.
Hence, in the switching theory and operation of series switches is equivalent to a digital logic “AND” gate.
Digital Logic AND Gate
The switching theory equivalent logic AND gate is shown below along with its truth table. The switches “A” and “B” are AND’ed together to yield an output “Q”.
Figure 4: The switching AND gate and truth table
Parallel Switches Case
Consider the following circuit having a voltage source, a lamp, and two parallel switches. Similar to the series switches, these two parallel switches make a total of four combinations to control the lamp. The lamp has four states corresponding to each combination of A and B which are now connected in parallel to each other. As obvious from physical switches in parallel, the current will flow from the voltage source to the lamp when any of the switches is in a closed or at a logical “1” state. The parallel switches’ truth table is shown below:
Figure 5: A parallel switches case
From following the truth table, it is clear that when both switches/ inputs are open or at a “0” logical state then the lamp does not illuminate (state of “0”). When either of the switches is closed or at a “1” logical state, the lamp illuminates (a “1” state). This leads to L = A or B expression. In Boolean Algebra, it is an OR logical operation that is denoted by a plus (+) between the input variables i.e. L=A+B.
Hence, in the switching theory and operation of parallel switches is equivalent to a digital logic “OR” gate.
Digital Logic OR Gate
The switching theory equivalent logic OR gate is shown below along with its truth table. The switches “A” and “B” are OR’ed together to yield an output “Q”.
Figure 6: The Switching OR gate and truth table
Idempotent Law of Switches
In the above text, the switching theory equivalent logical AND, and OR gates are discussed having two different switches or variables i.e. “A” and “B”. These two variables can be controlled by a single variable such as “A” and operation of logical AND, and OR on single variables is defined as Idempotent Law. According to Idempotent Law, the AND’ing or OR’ing of a variable with itself will yield the original variable. This means that “A” OR’ed with “A” will yield “A” and, likewise, AND operation will also yield “A”. This can simplify switching circuits as illustrated below.
Idempotent Law of AND Function
The electric circuit constituting of same series switches along with the switching theory equivalent of AND gate is shown below.
Figure 7: Idempotent AND equivalent of switches
Idempotent Law of OR Function
The electric circuit constituting of same parallel switches along with the switching theory equivalent of the OR gate is shown below.
Figure 8: Idempotent OR equivalent of switches
Switching theory of a Boolean Function
According to switching theory, a combination of series switches gives a logical AND (multiplication) operation which is denoted by a dot (.) between variables. Similarly, a parallel combination of series switches gives a logical OR (sum) operation which is denoted by a plus (+) between variables. Using these switching theory equivalents a Boolean function can be constructed from an electric circuit and vice versa.
Switching Theory Example
In the following figure, a Boolean function of Q = (A+B).C is implemented using switches to illuminate a lamp (Q). Likewise, a Boolean function can also be obtained from a switching circuit using switching theory.
Figure 9: Example of switching theoryFigure 10: The logic equivalent of the example switching circuit
Conclusion
A switch can be used to express a digital state of input i.e. “OFF” equals “0” and “ON” equals “1”.
The switching theory expresses Boolean expressions in terms of switches to help in understanding.
The switches in series illuminate the lamp when both are “CLOSED” or “1” and constitute a logical AND operation.
The switches in parallel illuminate the lamp when any of them is “CLOSED” or “1” and constitute a logical OR operation.
Using switching theory, any Boolean expression can be used to construct a switching circuit and, likewise, a switching circuit’s equivalent Boolean expression can also be derived.
BIVROST® Lite5 is an extremely compact industrial computer that breaks through I/O bandwidth barriers for the most demanding applications, including machine vision and the edge computing work model based on neural network accelerators. Using Intel Xeon and Intel Core processors and supporting 5 M.2 slots, only 5 inches in size (mini-STX standard), the data processing capabilities found in enterprise-class solutions were compressed.
BIVROST® Lite5 platform is a combination of a universal motherboard with carrier-board characteristics with a module in the COM Express architecture (Basic Module Type 6), on which the processor and operating memory are embedded. This solution ensures a long project life, increase fault tolerance, and reduce the costs of migrating to newer processors in the future. By default, the Intel Core i7-8850H processor (6 cores / 12 threads, 2.6 GHz – 4.3 GHz, 9 MB cache, 45 W TDP) is offered along with 16/32/64/96 GB DDR4 memory. The 8th and 9th generations of Intel embedded processors are supported, and the 11th and 12th generation will join this year.
The essence of BIVROST® Lite5 is to provide extreme capacity on all available I/O interfaces used in industry. Of the five available M.2 slots, three are high-throughput M-key, providing a transfer rate of 32 Gbps (size 2280, PCIe 3.0 x4 lines). They enable the installation of neural network (AI) accelerators based on Intel, Coral, Hailo systems or fast and independent NVME disks. The independent speed of the slots allows the use of video capture cards or individual specialized FPGAs embedded on the M.2 interface.
The Lite5 project was born out of our own need. The design challenge was the necessity to connect multiple industrial cameras Pixelink (Navitar) with 8Gbps data capacity each simultaneously, image analysis using a neural network model on a dedicated accelerator and simultaneous recording of this data. And all to increase the efficiency and reliability of the automated production line. Due to information security, the project had to be free from cloud data analysis, work 24/7 and offline.
says Paweł Surgiel, President of the Management Board of BIVROST Sp. z o.o.
The Lite5 provides a wide range of input-output interfaces, including GPIO, I2C, LVDS, USB (3.2 gen2, 3.2 gen1, 2.0), UART, M.2 (key B, key E, key M), HDMI 2.0. The special 4 USB slots in the 3.2 gen2 standard provide a guaranteed total bandwidth of 32 Gbps thanks to the use of independent root hub chips and independent PCI Express lanes.
Key features:
Architecture: COM Express Type 6, extended support provided (embedded class)
CPU / GPU (default): Intel Core i7-8850H i Intel® UHD 630 GPU (6 cores, 12 threads, 2.6GHz – 4,3 Ghz, 45W / 35W CPU TDP)
Memory: 3 slots DDR4, max 96 GB, default 16 GB
I/O for embedded systems: GPIO, I2C, LVDS, 2x HDMI 2.0, SPDIF, 2x LAN 1Gbps
2: 3x universal (M key, size 2280, PCIe 3.0 x4 lanes), 1x SATA (B key), 1x WiFi (E key)
USB ports with dedicated, unshared bandwidth
Compact size: 5-inches (mini-STX),
Compatibility OS: Windows 10, Windows 11, Ubuntu Linux
BIVROST is the project leader. It was created by an international team with the support of Intel engineers, and the Taiwanese company Advantech is responsible for production. Technical support is provided in 24 countries. Lite5 is targeted at the most demanding industrial applications, especially in image analysis, as a runtime environment for neural network accelerators, in multimedia and digital signage projects, and in the security industry.
Portescap returns in person to Medical Design & Manufacturing West 2022 for the first time since 2020 to discuss the benefits of its medical motors, which power surgical hand tools, medical pumps, lab automation and ventilation equipment, and several other medical devices.
Portescap will demo its Surgical Motor Solutions — featuring sterilizable motors and controllers designed to withstand 3,000+ autoclave cycles — and showcase recent innovations. These include the CNT1530 sterilizable motor controller for surgical hand tools and new additions to its line of Ultra EC™ brushless DC motors.
With electronics and software encapsulated in a single enclosure, the CNT1530 provides simplified system integration. Compatible with typical NiMH and LiOn battery voltages, it features 20 amps of continuous current and can be paired with Portescap brushless DC slotted surgical motors.
New sizes have been added to the Portescap Ultra EC motor family. When targeted performance is critical, Ultra EC motors deliver minimal joule and iron losses while maintaining maximum power, thanks to a proprietary U coil design. Whether you require high speed, high torque or a balanced performance solution, Ultra EC motors are perfectly suited for medical and dental hand tools, respirators, robotics and more.
Monolithic Power Systems (MPS) MP2733 Battery Charger Management Devices are highly integrated switchmode battery charger management devices for single-cell Li-ion or Li-polymer batteries. These devices work with Narrow Voltage DC (NVDC) system power path management. The MP2733 devices feature a low-impedance power path that optimizes efficiency, reduces battery charging time, and extends battery life. These devices support a wide range of input sources, including standard USB host ports and high-powered wall adapters with fast-charge capabilities. The I2C interface allows the device to be flexibly controlled with configurable charging and system settings.
The MP2733 devices initiate and complete a charging cycle without software control. It automatically detects the battery voltage and charges the battery in different stages. Charging automatically terminates when a full charge is detected. When the charged battery drops below the recharge threshold, the charger automatically begins another charging cycle. These devices offer various safety features for battery charging and system operations, including a charging safety timer, battery temperature monitoring, Over-Voltage Protection (OVP), and Over-Current Protection (OCP). Typical applications include smartphones, tablets, wireless cameras, and other portable devices.
Features
3.7V to 16V operating input voltage range
Up to 22V sustainable voltage
High-efficiency, 4.5A, 1.35MHz buck charger with up to 92% charge efficiency with 3A charge current:
Configurable D+/D- for flexible fast charge protocol support
USB OTG with 4.8V to 5.5V adjustable output:
Up to 3A output and up to 93% efficiency with 1.5A output
NVDC power path management:
Instant-on works with no battery or deeply discharged battery
Ideal diode operation in battery supplement mode
High battery discharge efficiency with 14mΩ BATTFET up to 8.5A
I2C interface for flexible system parameter setting and status reporting
Fully integrated MOSFETs and current sensing
Dedicated DISC pin to control shipping mode and system reset
13µA low battery leakage current in shipping mode
Integrated ADC monitors input voltage and current, battery voltage, charge current, system voltage, and battery temperature
Charging status indicator
Safety features:
Configurable JEITA for battery temp protection in charge mode, battery charging safety timer, thermal regulation and shutdown, watchdog monitoring I2C, and input/system OVP
Analog Devices Inc. LTC4249 Dual Electronic Circuit Breaker (ECB) provides independent overcurrent protection to a pair of loads. Each channel has a precision enable input, current monitor output, and ready status output. A single resistor configures the ECB threshold. If either channel detects an overcurrent condition, the corresponding breaker disconnects the input from the load.
After a circuit breaker event, the open-drain RDY status output of the Analog Devices Inc. LTC4249 pulls low, and the ECB latches off. Toggling the enable input turns the ECB back on after a 1-second cool-off period. The cool-off timer, overtemperature sensor, short-circuit detector, and inrush controller prevents operation outside the circuit breakers’ safe operating area.
The precision enable inputs, ready outputs, and analog current monitor outputs permit voltage sequencing and closed-loop bias current control applications. ECB channels may be paralleled as needed. Load isolation and reverse current detection applications are also possible.
Infineon’s CoolSiC™ MOSFETs use an optimized, state-of-the-art trench semiconductor process that enables both the lowest losses in the application and the highest reliability in operation. The products, with voltage classes of 1700 V, 1200 V, and 650 V and forward resistances from 27 mΩ up to 1000 mΩ, are ideally suited for integration in applications such as photovoltaic inverters, battery charging, energy storage, motor drives, UPS, auxiliary power supplies and SMPS ab. Infineon’s CoolSiC MOSFETs are available at www.rutronik24.com.
The MOSFETs in discrete packages are ideal for power factor correction (PFC) circuits, bidirectional topologies, and DC-DC converters or DC-AC inverters. They also impress with excellent immunity to unwanted parasitic turn-on effects and low dynamic losses, even at zero volt turn-off voltage in bridge topologies.
Using CoolSiC™ Trench technology, a flexible parameter set is enabled, which is used to implement application-specific features in the respective product portfolio:
The 650 V CoolSiC™ MOSFETs, for example, offer optimized switching behavior at high currents and low capacitances. They are designed for industrial applications such as servers, telecommunications, and motor drives.
The 1200 V MOSFET range is suitable for both industrial and automotive applications such as on-board chargers/PFC, auxiliary inverters, and uninterruptible power supplies (UPS).
The flyback typology characterizes the 1700V variant, which makes it ideal for use in energy storage systems, fast charging of electric vehicles, power management (SMPS), and solar energy system solutions.
Less offers more Infineon’s EiceDRIVER™ offers a range of selected driver ICs that meet the requirements of extremely fast SiC MOSFET switching. Combined, the CoolSiC products enable improved efficiency, reduced cooling requirements, space and weight savings, part count reduction, and increased system reliability with a longer lifetime at lower system cost.
Features
Low component capacitances
Temperature-independent switching and low conduction losses, especially under part-load conditions
Intrinsic diode with low reverse recovery charge
Threshold-free on-state characteristics; threshold voltage Vth > 4 V
Excellent gate oxide reliability
IGBT compatible drive (+18 V)
Short circuit and avalanche robustness
Higher frequency operation
For more information about Infineon’s CoolSiC™ MOSFETs and a direct ordering option, please visit our e-commerce platform at www.rutronik24.com
Satellite messaging devices have been around for several decades and with the introduction of various energy-efficient wireless technologies, many hobbyists and startups designed smartphone-like messaging devices, one being CircuitMess’ Chatter that uses LoRa communication and does not demand a cellular network or SIM card slot to work. Through its minimalistic design, the device creates its own wireless network to communicate with other chatter devices that have already been paired with it. With its DIY flexibility, enthusiasts can develop their own wireless communicator, thanks to the CircuitMess Chatter, an open-source project.
Marketed as a “free, private, security-first texting device”, the CircuitMess Chatter is shipped in a pair letting you use the messaging device with your friends. The motivation behind designing messenger is to provide enough functionalities to allow users to communicate freely and remotely without the need for internet service or a cellular network. As mentioned earlier, CircuitMess Chatter uses LoRa low-power wide-area network technology to communicate between messaging devices. Inside the shipped box, you will be receiving a Chatter circuit board with a built-in network communication module, a dual-core CPU, an antenna, a display board of size 128×160 TFT color and AAA batteries. For the enclosure, the package will include an acrylic casing and an instruction manual for educating the user how-to-use the device.
DIY CircuitMess Chatter will be required to be assembled yourself and the instructions will be provided by the manufacturer on its official product page.
“The messages you send to other Chatter devices are encrypted and are not passing through an internet service provider so you can share as many secrets as you want with your friends (maybe we should’ve programmed a pinky swear button),” the manufacturer notes on its latest design.
If you are using an Apple Watch or any other device with the Walkie Talkie feature, then you are very much familiar with the technology. As the manufacturer, CircuitMess says, “this device is not a replacement for your regular phone,” because it does not have any other function than wireless communication within a specified range of 1–7km depending on the surrounding area. The device will come with all the familiar messaging functions, including a friend list, friend pairing, chat color customization, profile avatars, memes, and notifications.
CircuitMess STEM Box was successfully funded last year on Kickstarter, which already showcased many other products, including the Chatter. Now the device is officially on sale on the company’s Tindie store for $114.99 which lets you build a pair of chatters.
NVIDIA brought Jetson Xavier NX with supercomputer performance to edge locations delivering up to 21 TOPS to run neural networks in parallel and process data from several high-resolution external sensors. To take advantage of the NVIDIA Jetson Xavier NX, many manufacturers developed custom hardware for AI and NLP applications that could be deployed at edge settings. Maltese AI manufacturer known for video analytics and AIoT devices, SmartCowannounced a new audio-visual development kit, Apollo, built around the NVIDIA Jetson Xavier NX allowing developers to create applications with conversational AI capabilities.
With rich onboard sensor functionalities including four microphones, two speaker terminals, two 3.5mm phone jacks, an 8MP IMX179 camera module, and an OLED display. In terms of storage, the SmartCow Apollo development kit gets 128GB NVMe SSD for storage and is shipped with NVIDIA DeepStream and RIVA embedded software development toolkits. The base frame also allows the hardware to stand upright, making it easy to work and deploy applications.
“Traditional development kits are geared toward beginner-level developers working with general-purpose use cases with AI vision widely used across applications. We recognize the breadth and depth of developers out there who want a dev kit that enables them to go deeper into their research and development, including the ability to implement conversational AI and NLP,” said Ravi Kiran, Founder and CEO of SmartCow. “Apollo is a specialized dev kit created to meet higher-level developers’ needs and give them a way to get straight to more conversational applications.”
SmartCow has provided a list of example use cases for the Apollo development kit and they include text-independent speaker recognition systems, speech to text and sentiment analysis, language translation and speaker diarizations, and applications for abnormal sound and surveillance. There are many vision-based applications that can be implemented leveraging the onboard camera sensor and providing a real-time video stream for data analysis and visualization.
“Edge computing technology has revolutionized the way people work, live and travel,” continued Kiran. “Apollo enables developers to continue to create and build applications that transform everyday life, such as digital transformation of conference rooms, airport self-service counters, facility management, and more. By including advanced NLP in our development kits, Apollo addresses these growing needs, enabling users to create conversational edge computing applications.”
To get your Apollo development kit, you are requested to fill out a Google form that takes your information. There is no update on the pricing as of yet, but the shipment is expected to begin on April 8, 2022. More details can be found on the documentation page.
Shenzhen Xunlong released its new board design Orange Pi 4 LTS, with almost the same specifications and layout as Orange Pi 4 but with minor changes. It is considered to be an optimized version of the original Orange Pi 4 integrated with readily available components while keeping the prices fairly reasonable. Built around the Rockchip RK3399 system-on-chip featuring dual-core Arm Cortex-A72 clocked up to a frequency of 1.8GHz also incorporates quad-core Arm Cortex-A53 at 1.4GHz clock frequency. Additionally, the SoC gets a Mali-T860 graphics processing unit but no neural processing unit unlike the RK3399Pro has 3 TOPS NPU.
For processing several applications simultaneously, RAM is one of the important aspects to look at, and the Orange Pi 4 LTS gives developers the option to choose between 3GB or 4GB LPDDR4 RAM. To store custom programs designed for your edge applications, there is a MicroSD card slot and optional 16GB eMMC flash storage. There are some other minor changes in the Orange Pi 4 LTS in comparison to the original model as noticed by CNX-Software. These include the replacement of Realtek ALC5651 audio codec by ESS ES8316 codec and the shortening of standard 40-pin to 26-pin GPIO headers. Changes might be subject to limited space on the board as they are now using two RAM chips instead of one like their predecessor.
For connectivity, the board will be shipped with a Gigabit Ethernet port via YT8531C (transceiver), dual-band 802.11ac 2×2 MIMO Wi-Fi 5, and Bluetooth 5.0. The integrated CDW-20U5622-02 module is responsible for the support for wireless connectivity, defined as “a single-die wireless local area network (WLAN) and Bluetooth (BT) combination solution to support IEEE 802.11a/b/g/n/ac WLAN standards and BT 5.0, enabling seamless integration of WLAN/BT and low-energy technology.”
Sized at 91×56 mm is slightly bigger than the Raspberry Pi 4 Model B but has decent input/output ports including the USB 3.0 and USB 2.0 Type-A ports, a USB 3.0 Type-C port, 24-pin mini PCIe connector, dedicated connectors for the camera, and display modules. To power the hardware, the power jack will support a 5V/3A DC power supply through a DC jack or USB Type-C port.
Today, the manufacturers have provided Android, Ubuntu, and Debian images which are available to download but we are still expecting some detailed documentation on getting started with the hardware. Interestingly, Shenzhen Xunlong has provided open-source schematics for the design for detailed viewing of the ICs used on the board. If you are looking forward to purchasing the board, it is available on AliExpress starting at $72.90 (if you are shipping it to the United States or Canada).
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