The USB Isolated V 1.0 is an extension board for RaspBerry Pi based on an Open Hardware Design. It is a board with an USB Digital Isolator (ADuM4160) produced by Analog Device. The board is connected to the Raspberry with an USB Bus, this feature allow the compatibility with other linux boards.
The ADC Relay Adapter V 8.0 is an extension board for RaspBerry Pi based on Open Hardware Design. It has two principaln hardware features: control of 4 relays and 4 ADC channels. The board is connected to the Raspberry with an USB Bus, this feature allow the compatibility with other linux boards.
This board contains four switch relay 1 Form C, 2 ADC IN 0-10V and 2 ADC IN 4-20mA. The connection with Raspberry PI is made with a classical USB-UART converter FT232RL (FTDI Chip) compatible with the kernel, the USB connector provides also the power supply.
This choice make the device usefull also in non-linux based board too.
You can control it with a serial connection with /dev/ttyUSB*. I prefer Putty, but if you use the command line, you can work with minicom.
You can develop your own GUI, for example using QT-QML/C++ libraries, so you can realize simple control algorithms (P,PI,PID) with and without autotunig, or more complex cost effective control devices.
by Pier826·Comments Off on Simple RS 422 transceiver
Simple RS 422 transceiver
The interface RS 422 is a serial communication with differential signals for TX and RX. We have a TX that becomes TX+ and TX-, and a RX that becomes RX+ and RX-. There are two important advantages of a differential serial communication: the first is the high noise immunity, and the other is is the possibility of utilize long wires (up to 1500 m).
ServoBerry V 1.0 is an extension board for Raspberry Pi derived from the shield Adafruit 16-Channel Servo Driver, and it is an Open Hardware Design. It has two functionalities: a PWM led/motor driver IC and an ADC.
The PWM is the PCA9685 an I2C-bus controlled 16-channel LED controller. Each LED output has its own 12-bit resolution (4096 steps) fixed frequency individual PWM controller that operates at a programmable frequency from a typical of 24 Hz to 1526 Hz with a duty cycle that is adjustable from 0% to 100% to allow the LED to be set to a specific brightness value. All outputs are set to the same PWM frequency. The LED output driver is programmed to be either open-drain with a 25 mA current sink capability at 5 V or totem pole with a 25 mA sink, 10 mA source capability at 5 V. The MCP3008 device is successive approximation 10-bit Analog-to-Digital (A/D) converters with on-board sample andhold circuitry. The MCP3008 is programmable to provide four pseudo-differential input pairs or eight single-ended inputs. Communication with the devices is accomplished using a simple serial interface compatible with the SPI protocol. The devices are capable of conversion rates of up to 200 ksps.
You can see a couple of PWM motors connected to ServoBerry board.
It is possible to preorder this board for only 25€.
ServoBerry with CodeSys
It is possible to use servoberry board with codesys application for raspebrry.
The GPIB standard was created in the late 1960s for use with automated test equipment, and is still in use for that purpose. More recent standards such as USB, FireWire, and Ethernet take advantage of declining costs of interface electronics to implement more complex standards providing higher bandwidth, so many new measuring instruments can be controlled without GPIB. The USB-GPIB Adapter is important to control old / second hand instruments. Typical instruments of a laboratory for hobbistic electronic.
GPIBerry Pi V 1.1 is an extension board for RaspBerry Pi. It is an Open Hardware Design. It has the functionality of a GPIB-USB adapter. The board is connected to the Raspberry with an USB Bus, this feature allow the compatibility with other linux boards.
GPIBerry PI 1.1 is composed by two blocks: an Arduino Nano V3.0 board and GPIB drivers SN75160BDWG4 and SN75161BDGW4.
GPIBerry V1.1 is not longer supported, it remains in experimental phase.