Page 246 – Electronics-Lab.com

Precision Thermocouple Amplifier (Thermocouple to Digital Converter with Linearization – SPI Interface)

This precision thermocouple sensor module performs cold-junction compensation and digitizes the signal from any type of thermocouple. The output data is formatted in degrees Celsius. The converter resolves temperatures to 0.0078125°C, allows readings as high as +1800°C and as low as -210°C (depending on thermocouple type), and exhibits thermocouple voltage measurement accuracy of ±0.15%. The thermocouple inputs are protected against overvoltage conditions up to ±45V. A lookup table (LUT) stores linearity correction data for several types of thermocouples (K, J, N, R, S, T, E, and B). Line frequency filtering of 50Hz and 60Hz is included, as well as thermocouple fault detection. An SPI-compatible interface allows the selection of thermocouple type and setup of the conversion and fault detection processes. The operating supply of the project is 5V and it consumes a very low current. The module communicates over the SPI interface.

Arduino Interface

Testing this module with Arduino is very easy. The pin configuration information is available below.

Adafruit library and example code are available at the Adafruit website below and on downloads under the article.

https://learn.adafruit.com/adafruit-max31856-thermocouple-amplifier/wiring-and-test

Arduino Connection to board CN1

CN1 Pin 1 >> 5V
CN1 Pin 2 >> DY DIGITAL PIN D5
CN1 Pin 3 >> CS DIGITAL PIN D10
CN1 Pin 4 >> SK DIGITAL PIN D13
CN1 Pin 5 >> SO DIGITAL PIN D12
CN1 Pin 6 >> SI DIGITAL PIN D11
CN1 Pin 7 >> FAULT NO CONNECTION
CN1 Pin 8 >> GND

Features

Supply 5V DC @ 10mA
Supports K, J, N, R, S, T, E, and B Type Thermocouples
Easy SPI Interface
Screw Terminal for Easy Sensor Connections
Male Header Connector for Micro-Controller Connections
On-Board Power LED
Detects Open Thermocouples
Over- and Under temperature Fault Detection
Provides High-Accuracy Thermocouple Temperature Readings
Includes Automatic Linearization Correction for 8 Thermocouple Types
±0.15% (max, -20°C to +85°C) Thermocouple Full- Scale and Linearity Error
19-Bit, 0.0078125°C Thermocouple Temperature Resolution
Internal Cold-Junction Compensation Minimizes System Components
±0.7°C (max, -20°C to +85°C) Cold-Junction Accuracy
±45V Input Protection Provides Robust System Performance
Simplifies System Fault Management and Troubleshooting
50Hz/60Hz Noise Rejection Filtering Improves System Performance
PCB dimensions: 21.59 x 33.81 mm

Schematic

Parts List

NO.	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	1	CN1	8 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5321-ND
2	1	CN2	4 PIN MALE HEADER PITCH 2.54MM	DNP		DNP
3	1	CN3	2 PIN SCREW TERMINAL PITCH 5.08MM	PHOENIX	DIGIKEY	277-1247-ND
4	3	C1,C4,C5	0.1uF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
5	2	C2,C3	0.01uF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
6	1	D1	LED SMD SIZE 0805	OSRAM	DIGIKEY	475-1278-1-ND
7	3	D2,D3,D4	1N4148 SMD	MICROCHIP	DIGIKEY	1N4148UR-1-ND
8	2	L1,L2	FERRITE BEAD OR 100E 5% RESISTOR SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
9	1	R1	470E 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
10	3	R2,R3,R4	10K 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
11	1	R5	0E SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
12	1	U1	MAX31856	MAXIM	DIGIKEY	MAX31856MUD+-ND
13	1	U2	LM117-3.3V	TI	DIGIKEY	LM1117MP-3.3/NOPBCT-ND

Connections

Block Diagram

Supported Thermocouple Types

Gerber View

Photos

Video

MAX31856 Datasheet

Introducing SnapEDA on Electronics-lab.com

Posted on 22 July, 202123 July, 2021 by mixos

Today we are announcing our collaboration with SnapEDA.com, the first and leading electronics design search engine of the web, that each year, over a million hardware designers around the world use it to design electronics faster, making everything from smartwatches, to drones, and robots. They provide ready-to-use building blocks for design, including symbols & PCB footprints, their library shaves days off product development, allowing designers to focus on optimization and innovation.

With a common purpose of making engineers’ lives easier, SnapEDA and Electronics-Lab have teamed up to provide their engineering community with SnapEDA’s seamless CAD search experience on Electronics-Lab.com. This new integration will allow engineers to search, discover and download millions of CAD models (symbols, footprints, and 3D models) directly from Electronics-lab.com. Engineers will also be able to find other resources like datasheets, technical specifications, and purchase options.

Here are some of the key features that Electronics-Lab users will experience with the new SnapEDA integration:

Search millions of electronic component models by manufacturer, orderable part number, specs, and packaging.
Download the symbols and footprints in over 15 PCB design formats including Altium, KiCad, Autodesk EAGLE & Fusion360, Cadence Allegro, OrCAD, Pulsonix, DipTrace, Proteus, & more.
Find component datasheets.
Check prices, stock availability, and purchase components directly from major distributors’ sites including Digikey, Mouser, Arrow, Online components, RS Components, among others.
Request CAD models if they’re not yet available in SnapEDA’s parts library with our InstaPart service.

This new collaboration will help engineers find the components they need, by searching either by part number, manufacturer, or general keywords like ‘20 pin SMD connector’

Navigation Demo

How to Search and Download SnapEDA CAD Models from Electronics-Lab.com

Go to https://www.electronics-lab.com/snapeda-cad-models/?/#/
Search for any keyword like ‘Ultrasonic MEMS’

Select the component

Under the 2D tab, select the PCB format of your preference over the 15 formats supported by SnapEDA

Go to the 3D tab to see the preview of the 3D model

To request parts that are not available, simply click on the request button and we will create it for you in less than 24 hours. If you don’t have credits, request them here.

That’s how seamless it is to navigate through this new integration. Start searching now!

NANO-6063, the Latest NANO-ITX Embedded Board Powered by Intel Atom® x6000E Series Processors

Posted on 22 July, 2021 by mixos

NANO-6063 is Designed with 2.5GbE featuring Intel TSN/TCC Real-time Capability and -40°C to 85°C Wide operating Temperature for Industrial Automation, Healthcare Systems and Outdoor Gateway Application.

Intel Atom® x6000E Series SoC based NANO-ITX Board with Triple Display, GbE LAN, USB 3.2 Gen 2, M.2, SATA III, Mini-PCIe, and mSATA

American Portwell Technology, Inc., a wholly-owned subsidiary of Portwell, Inc., and a Titanium Partner of Intel Partner Alliance, recently announces the release of NANO-6063, a NANO-ITX form factor (120mm x 120mm) embedded system board based on the Intel Atom x6000E processor series, formerly codenamed Elkhart Lake. Installing with the latest released Intel Atom platform, NANO-6063 supports the next generation of IoT edge devices. Intel has developed this new type of processors to enhance IoT applications depending on new levels of CPU and graphics performances with integrated IoT features, real-time performance, manageability, security, and functional safety.

Versatile, Compact, Powerful and Fan-less

The NANO-6063 Nano-ITX embedded board is built with the Intel Atom processor x6000E product family. Not only does it operate well with thermal design power (TDP) under 12W suitable for fan-less applications, but it also supports a wide industrial temperature range from -40°C to 85°C. With superior quad-core processing power and high computing capability, it builds up even greater and faster performance than the previous generation. The flat/low-profile design — measuring 25.25mm in height with I/O shield — allows space-saving installation in display and compact workstation, like digital signage and control solutions for applications of industrial and business levels. In brief, it’s a quick and easy solution with newly integrated IoT features for customers. By using Portwell’s NANO-6063, they can design in their own unique systems in diverse applications such as industrial automation, robotic control system, automated test equipment, automated guided/unmanned vehicle, medical equipment, outdoor gateway, outdoor digital signage and more.

Features

Intel Atom® x6000E series SoC based NANO-ITX board
DDR4 3200 MT/s non-ECC SO-DIMM up to 32GB
Triple Display by DP, HDMI and VGA
Dual Gigabit Ethernet, M.2 socket, SATA III port, Mini PCIe and mSATA socket
Supports Real-Time Performance: TSN, TCC
Support a wide -40°C to 85°C industrial temperature range
On board TPM 2.0

Great Computing Performance and Long product life span

The NANO-6063, designed with Elkhart Lake Intel Atom x6000E processor series, features one DDR4 3200 MT/s SO-DIMM socket equipped with up to 32GB capacity. To perform multiple high-resolution 4K videos in parallel and improved AI performance, it integrates Intel Gen 11 UHD Graphics with triple independent display support via DisplayPort and HDMI in 4Kp60 resolution, and one VGA offering flexible display options. Moreover, it supports four USB 3.2 Gen 2 ports (10Gbps) to ensure fast data transmission with low-power consumption. With one multiple function with mSATA & mini-PCIe port, it can be configured to support either full-size mini-PCIe or mSATA by BIOS. In addition, it features SATA 3.0 interfaces with up to 6 Gb/s allow quick and flexible system expansions. Last but not least, to fulfill real-time performance and high-speed computing, it is equipped with one GPY215 driven 2.5GbE port with Intel Time Sensitive Networking (TSN) and Time Coordinated Computing (TCC) technologies for real-time computing and control capability, and one Intel I210IT Gigabit Ethernet controller to provide dual Gigabit Ethernet LAN access via two RJ-45 ports.

“At Portwell, we strive for excellence,” says Maria Yang, product marketing engineer at American Portwell, “and the NANO-6063 is merely one example of the multitude of superior products designed and manufactured at our facilities. We challenge ourselves constantly to understand our customers’ unique business needs and are committed to meeting their demands. Our customers also benefit from the peace of mind they get from the 10+ years long product life span support inherent with this Portwell product.”

more information: https://www.portwell.com

Single-ended Video/Digital input to differential output driver (High Speed Differential Driver)

The project described here is a low-cost solution to transmit a video or digital signal up to 300 Meters over a twisted pair cable. The project has been designed using the AD8131 chip which is a differential driver for the transmission of high-speed signals over low-cost twisted pair or coaxes cables. The project can be used for either analog or digital video signals or for other high-speed data transmissions. It is capable of driving either Cat3 or Cat5 twisted pair or coax with minimal line attenuation. The AD8131 has on-chip resistors that provide for a gain of 2 without any external parts. Several on-chip resistors are trimmed to ensure that the gain is accurate, the common-mode rejection is good, and the output is well balanced. This makes the AD8131 very suitable as a single-ended-to-differential twisted-pair line driver. The board works with +/-5V DC (Dual 5V) supply, RCA connector J1 to feed single-ended Video or digital signal, connector CN2 is used to connect the twisted pair cable (CAT5), D1 Power LED, Resistor R7 and R8 terminate the line at transmitting side.

The AD8131 is a differential or single-ended input to differential output driver requiring no external components for a fixed gain of 2. The AD8131 is a major advancement over op amps for driving signals over long lines or for driving differential input ADCs. The AD8131 has a unique internal feedback feature that provides output gain and phase matching that are balanced to −60 dB at 10 MHz, reducing radiated EMI and suppressing harmonics. Manufactured on the Analog Devices, Inc. next-generation XFCB bipolar process, the AD8131 has a −3 dB bandwidth of 400 MHz and delivers a differential signal with very low harmonic distortion.

This project converts analog Video/Digital signals into differential signals and can be used with Twisted-Pair Cable-CAT5 – Composite Video Differential Receiver Amplifier project published on our website. An alternative driver with an adjustable gain is the Balanced Line Driver for High Speed Digital and Video Signal.

Features

Supply +/-5V DC
Fixed Gain 2
Single-Ended Video or Digital Signal Input – RCA Connector
Differential Output – Screw Terminal
Low Balance Error
Output Impedance 100 Ohms
PCB Dimensions 36.67 x 24.77 mm

Schematic

Parts List

NO	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	1	CN1	3 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5316-ND
2	1	CN2	3 PIN SCREW TERMINAL PITCH 5.08MM	PHOENIX	DIGIKEY	277-1248-ND
3	2	C1,C3	0.1uF/50V SMD SIZE 0895	MURATA/YAGEO
4	2	C2,C4	10uF/16V SMD 1206 OR 1210	MURATA/YAGEO
5	1	C5	100uF/25V ELECTROLYTIC	NICHICON	DIGIKEY	493-12902-1-ND
6	1	D1	LED SMD SIZE 0805	OSRAM	DIGIKEY	475-1278-1-ND
7	1	J1	RCA CONNECTOR
8	1	R1	1K 5% SMD SIZE 0805	MURATA/YAGEO
9	2	R2,R3	0E SMD SIZE 0805	MURATA/YAGEO
10	1	R4	24.9E 1% SMD SIZE 0805	MURATA/YAGEO
11	1	R5	DNP
12	3	R6,R7,R8	49.9E 1% SMD SIZE 0805	MURATA/YAGEO
13	1	U1	AD8131 SOIC8	ANALOG	MOUSER	584-AD8131ARZ-R7

Connections

Gerber View

Photos

Video

AD8131 Datasheet

600V – 30A IPM Module Carrier Board for Variable Frequency Drive (VFD)

Posted on 21 July, 2021 by mixos

This compact IPM module circuit provides a fully-featured, high-performance inverter output stage for AC Induction, BLDC, and PMSM motors. The circuit is based on FNA23060 chip which integrates the optimized gate drive of the built-in IGBTs to minimize EMI and losses, while also providing multiple on-module protection features: under-voltage lockouts, over-current shutdown, temperature sensing, and fault reporting. The built-in, high-speed HVIC requires only a single supply of 15V and translates the incoming logic-level gate inputs to high-voltage, high-current drive signals to properly drive the module’s internal IGBTs. On-Board optional current sense circuit can be used to monitor the current. LM317 regulator provides 5V DC output to drive op-amp current sense circuit. LED D4 and D5 indicate 5V power and 15V power. Board has an option for 3 current sense resistors. An external 3 phase current circuit is required for 3 phase current sense circuit, if a single current sense circuit is required, solder all 3 phase NU+, NV+, NW+ together and use U4 op-amp circuit, in this case, solder R16. The current sense circuit is built using op-amp based, the gain of the circuit can be set as per user requirement. The board works with lethal high voltage DC and requires extra care while testing. PFC-based DC power supply is recommended to power the board.

600V – 30A IPM Module Carrier Board for Variable Frequency Drive (VFD) – [Link]

300W Off-line Power Factor Correction (PFC) Boost Converter

Posted on 21 July, 202121 July, 2021 by mixos

The circuit presented here is a 300W off-line power factor correction (PFC) boost converter providing a nominal regulated output voltage of 375V @ 0.8A of load current. The project accommodates an input voltage range of 85V AC to 265VAC and uses average current mode control at a fixed programmable switching frequency of 116KHz. The project is based on UCCC28180 PFC controller module which incorporates a wide range of protection features to ensure safe system operation. The controller operates under average current mode control at a fixed programmable switching frequency of 116 kHz. Simple external current and voltage loop compensation, along with advanced protection features, make this controller ideal for server and desktop power supplies, industrial power supplies, and white goods. The project includes onboard fuse for short circuit protection, EMI filter, NTC to control inrush current, Bridge rectifier for DC rectification, high voltage/current MOSFET for switching, switching diode, high current inductor, high-value DC bus filter capacitor on the output. This project requires UCC28128 based controller board that can be mounted vertically on the PCB socket.

300W Off-line Power Factor Correction (PFC) Boost Converter – [Link]

3 Phase AC input – DC Output – High Voltage DC Power Supply (2KW)

Posted on 21 July, 2021 by mixos

Although this power supply design is specific to the Intelligent Power Modules (IPM) VFD drives, high voltage boost converters, high voltage battery chargers, etc, the concept and circuit design may be used for any power supply that requires a high voltage output of up to 800V DC and 4 A. Since it is an unregulated power supply the output will depend on AC input voltage. The circuitry includes a passive EMI filter consisting of elements C8, C9, C4, T1, and L1. Bridge rectifier D1, R1 for inrush current protection, and a relay RL1 for soft powering up and reducing conduction losses in steady-state. 4 x electrolytic capacitors C2, C3, C6, C7 are used for buffering the rectified DC bus voltage, bleeding resistors R1, and R2 provided to discharge the DC bus capacitor after power off. It is advisable to use a heatsink for the bridge rectifier. Inrush current circuit requires 12-15V DC @ 80mA. Choose appropriate fuse as per current requirement. The relay takes care of the inrush current. It is important to switch ON the 12V-15V DC and 3phase power same time.

3 Phase AC input – DC Output – High Voltage DC Power Supply (2KW) – [Link]

Clock Multiplier – Crystal Frequency Generator using PT7C4511

Posted on 21 July, 2021 by mixos

This is an easy-to-build project and it is the most cost-effective and high-performance frequency multiplier, which instigates analog phase lock loop techniques. The circuit provides high-quality, high-frequency output from lower frequency crystal or clock input. The project can be used as a crystal frequency oscillator, clock multiplier and frequency translation. Using phase-locked-loop (PLL) techniques, the device uses a standard fundamental mode, inexpensive crystal to produce an output clock up to 200Mhz. On-board jumpers are provided to select from nine different multiplication factors, which output many common frequencies. The device also has an output enable pin that tri-states the clock output when the enable pin is taken low. The chip is intended for clock generation and frequency translation with low output jitter.

Clock Multiplier – Crystal Frequency Generator using PT7C4511 – [Link]

VD6283TX Hybrid Filter Multispectral Sensor

Posted on 21 July, 2021 by mixos

STMicroelectronics’ color sensor with advanced light flicker extraction is fast and accurate thanks to an individual ADC

STMicroelectronics’ VD6283 (1.83 mm x 1.0 mm x 0.55 mm) is a color sensor with advanced light flicker extraction. Light measurement is fast and accurate thanks to an individual ADC and a readout for each color channel. The VD6283 uses hybrid color filters with precise responses allowing accurate computation of the correlated color temperature (CCT) and Lux information. The VD6283 can be used for display brightness management or scene light correction.

With a patented architecture and a high-performance photodiode design, the VD6283 can extract light flickering frequencies to avoid banding effects on videos or check that they are safe for the human eye. Additionally, the VD6283 is the only sensor able to extract different light flicker waveforms from 100 Hz and 2 kHz, including LED square signals, that can run flicker operations simultaneously with ALS operations.

Features

Miniature optical module
- 1.83 mm x 1.0 mm x 0.55 mm
- Optical BGA, 6-balls, reflowable package
- Operates with cover glass on top
ALS operation with 6 independent channels (red, green, blue, IR, clear, and visible)
- Advanced hybrid filters with high photocount response
- Operating conditions: 7 mLux to 30 kLux (green channel)
Light flicker extraction
- Innovative readout architecture to extract AC light flicker signal
- From 100 Hz to 2 kHz frequency detection, sine or square wave
Software driver provided by ST
I²C interface up to 1 Mbit/s (Fast mode plus)
1.8 V power supply
Operating temperature: -30°C to +85°C

Applications

Screen brightness control for personal electronics
Auto white balance color for displays or cameras
Light flicker removal for cameras
Scene light correction thanks to Lux and CCT measurement
IoT display brightness control for power saving
Light control for smart buildings or greenhouses
Predictive maintenance for light aging
Light flicker frequency extraction to check eye-safety

more information: https://www.st.com/en/imaging-and-photonics-solutions/vd6283tx.html

ICL88xx family of single-stage flyback controllers have constant voltage output

Posted on 21 July, 2021 by mixos

Cost-effective dimmable and intelligent LED systems are expected to increase the market share disproportionately in the coming years. Introducing the ICL8800, ICL8810 and ICL8820 single-stage flyback LED controllers for constant output voltages, Infineon Technologies AG addresses the need of LED driver manufacturers in this regard. With their unique features, the ICs meet the necessary performance requirements for LED lighting applications, such as LED drivers and luminaires up to 125 W, smart lighting, and emergency luminaire. Outside this market segment, adapters and chargers, flat TVs, all-in-one PCs and monitors up to 125 W profit from the ICL88xx family.

All three variants offer benchmarking performance for power factor correction and total harmonic distortion at full-load and low-load conditions, thus enabling platform design and window drivers. They are optimized as secondary-side regulated (SSR) constant voltage (CV) output flyback controllers and are also well suited for primary-side regulation (PSR). To achieve optimum efficiency and low electromagnetic interference (EMI) without compromising light quality, they are featuring critical conduction mode (CCM) and quasi-resonant mode (QRM) with smart valley hopping.

The ICL88xx family offers an external start-up circuit control signal for more flexibility and a cost-optimized bottom-up platform design for many applications. It has a comprehensive set of protection features, including a power limitation and secondary side over-voltage protection. In addition, the devices require a minimum number of external components, leading to outstanding cost-effectiveness compared to existing solutions. The gate driver current enables designs up to 125 W with state-of-the-art MOSFETs. The system performance and efficiency can be further optimized using Infineon’s CoolMOS™ P7 power MOSFETs.

ICL8800 is the basic variant providing all of the above features. ICL8810 is an advanced variant with an integrated burst mode that allows a very low standby power consumption of less than 100 mW and flicker-free deep dimming down to 0.1 percent. This feature makes ICL8810 ideally suited for smart lighting applications in connection with microcontrollers. Finally, ICL8820 is the fully-featured variant, additionally equipped with an integrated DC-input jitter function. The latter improves EMI performance and supports the fulfillment of EMI requirements in DC operation. ICL8820 eases EMI certification in the design of emergency lighting LED driver applications without additional circuitry, minimizing cost and effort.

Availability

ICL8800, ICL8810 and ICL8820 single-stage flyback LED controller variants are available in PG-DSO-8 packages and can be ordered now. More information is available at www.infineon.com/icl88.