Microcontroller

Digital-to-analog converters (DACs) provide accurate output voltages for actuation and control in many electronic applications such as industrial, medical, and RF systems.  The MAX5715 is a highly accurate, four-channel, 12-bit voltage output DAC. Development with DACs involves expertise in analog systems, power supplies, digital interfaces, and firmware. Now, the MAX5715 module is introduced to accelerate the development process. This module helps for rapid prototyping and development with the MAX5715 (a 12-bit, 4-channel, voltage-output DAC). DAC module interfaces to any Arduino-compatible or embed-compatible platform system with expansion ports configurable for SPI communication. The board directly interfaces to SPI with logic levels in the range of 2.7V to 5.5V.

C101
 

The project presented here uses the  MAX5541  chip, a serial-input, voltage-output, 16-bit monotonic digital-to-analog converter (DAC) that operates from a single  +5Vdc  supply. Notably, the DAC output is unbuffered, resulting in a low supply current of  0.3mA  and a minimal offset error of  1 LSB. The DAC output range spans from  0V to VREF, providing a wide range of voltage output options.

C103

This board created for makers, who want to use various Arduino UNO shields with PIC micro-controllers from Microchip. Board facilitates the use of any 28 PIN DIP PIC microcontroller with or without crystal. Omit Y1 , C9 and C10 in case of internal oscillator . Project can also be used to develop RS485 applications with the help of on board SN75176 IC. Two regulators provide 3.3V and 5V DC outputs. ICSP connector provided to program the PIC IC using PICKIT2/PICKIT3 programmer. On board DC jack connector and additional CN2 Header connector helps to power up the board. Input supply 7V-15V DC. This board has been tested using PIC16F886 IC. The board also supports PIC18F2331 and PIC18F2431 PICs mainly used for motor applications. Solder R9 and C8 if Motor PICs are used or left open for normal microcontrollers. Switch 1 helps to reset the board. Refer  to PCB top layout for Arduino to Microchip Pin configuration.

C102

The project described here is a Quad-channel digital isolator with  5000V_RMS  isolation ratings per  UL 1577. The board has three forward and one reverse-direction channel which makes this project ideal for isolated SPI interface between microcontroller and subnode unit. The circuit provides isolation between the main SPI unit (microcontroller) and the SPI slave. It has high electromagnetic immunity, reduces noise, and high voltage traveling to the main unit. All the outputs are normally high, use ENABLE pins to disable the outputs. Connecting Enable 1 and Enable 2 pins to GND respective sides puts all outputs LOW and all outputs are disabled. If the input power or signal is lost then the output goes high. Level translation range:  2.25V to 5.5V.

C105

Optically isolator Arduino Shield has been designed to provide optically isolated I2C communication between Arduino and any other device or sensors that works with  I2C  protocols. I have used the  ISO1540  Low-Power Bidirectional I2C Isolator IC from  Texas Instruments  to build this project, and the device is compatible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging the Arduino board. The  ISO1540  has two isolated bidirectional channels for clock and data lines. The project is suitable for multi-master applications. For applications where clock stretching by the slave is possible. LED D1 is the power indicator for side two. This board requires two separate supplies, side one powered from Arduino UNO 5V, side 2 require separate 3.3V to 5V.

C106

The project presented here is a USB port-powered, USB 2.0 isolator that isolates the USB host and USB device. It is a galvanically-isolated USB2.0 repeater, that supports low speed  1.5Mbps,  and full speed  12Mbps  communication. The project automatically connects and detects the bus speed. This  USB 2.0 isolator  is efficiently powered from the USB port and requires no external power, on board isolated DC-DC converter U1 provides 5V to the other side of the circuitry and USB port. U2 LDO provides  3.3V  to the chip. L1 and L2 ferrite beads take care of noise immunity on the DC bus. The project protects the host USB port from noise and high voltage.

C107

This module provides a solution for converting  RS232  signaling to  RS485  signaling. This allows long-distance communication since the range supported by RS232 is normally less than  50 feet  while RS485’s range can exceed  1000 feet. The design features an RS232 transceiver, an RS485 transceiver, a multivibrator, and a digital isolator with integrated power to implement bidirectional half-duplex communication without any software interference. The board has been tested for up to  800 feet  in length with a two-wire twisted pair cable. Up to  115200 baud  rate communication between two PCs via serial port has been successful. The design features the industrial standard IEC 61000-4-2 and 61000-4-4 protection with 5000 Vrms isolation protection.

C121

This is a low-noise,  32-bit,  38-kSPS,  10-channel (multiplexed),  delta-sigma  (ΔΣ) analog-to-digital converter (ADC) module. The project consists of  highly integrated  ADS1263  and includes a programmable gain amplifier (PGA), a 2.5-V low-drift voltage reference, an internal oscillator, dual-sensor excitation current sources (IDAC), several system-monitoring features, and an auxiliary 24-bit ΔΣ ADC. The integrated features and excellent performance of the  ADS1262  enable precision measurement of strain gauges, weight scales, pressure sensors, thermocouples, thermistors, and resistance temperature detectors (RTDs).

C108

Module is an  isolated RS-485 transceiver that features up to  ±42 V of ac/dc peak bus overvoltage fault protection on the RS-485 bus pins. The project is based on the  ADM2795E chip. The device integrates Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, RS-485 transceiver, and IEC electromagnetic compatibility (EMC) transient protection in a single package. The ADM2795E is an RS-485/RS-422 transceiver that integrates IEC 61000-4-5 Level 4 surge protection, allowing up to ±4 kV protection on the RS-485 bus pins (A and B). The device has IEC 61000-4-4 Level 4 EFT protection of up to ±2 kV and IEC 61000-4-2 Level 4 ESD protection on the bus pins, allowing this device to withstand up to ±15 kV on the transceiver interface pins without latching up. This device has an extended common-mode input range of ±25 V to improve data communication reliability in noisy environments. Supports a data rate  2.5Mbps.  The board operates with 5V DC, isolated DC-DC converter U1 helps to power the VDD2 supply. D1 is Power LED  

C109  

This simple, compact solution is ideal for isolated SPI data requiring communication across different ground potentials often found in Industrial PLCs (programmable logic controllers) and Instrumentation and data acquisition systems. Serial Peripheral Interface (SPI) is a protocol that is commonly used for communication between microcontrollers and peripheral ICs such as sensors, ADCs, DACs, and others.  The project is based on an  ISOW7741 quad-channel digital isolator with an integrated DC-DC converter. For many industrial control applications, the communications pathway between the microcontroller and the I/O module devices must be isolated. Isolation helps to minimize noise and ground loop issues and also protects expensive control units (MCUs or FPGAs) and equipment operators. This module is the solution to all these problems and the inbuilt DC-DC converter is a great advantage that powers the output side of the circuitry and thus the project can work with a single supply. The DC-DC converter output can be used to power the peripherals device maximum load up to  100mA with  5V_DC input.

C110
 

This module provides 16-bit, general-purpose parallel I/O expansion for I2C or SPI bus applications. The  MCP23017 chip supports the I2C interface and the  MCP23S17 chip is used for the SPI interface. The board can be populated with either SPI or I2C chip. Follow the connection diagrams for interface details.

C111
 

This  is a high-frequency differential line receiver amplifier that has excellent common-mode rejection at its inputs. The project is an ideal solution for a receiver of a digital signal or video signals that are transmitted over long distances 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 digital signal or analog transmission of signals such as video. These long cables pick up noise from the environment they pass through. This noise does not favor 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. This project is tested with  100Hz to 1Mhz square wave signal, however, it can support higher frequency.

B121