Raspberry Pi High-Precision AD/DA Expansion Board

I just plugged in my raspberry pi3 and i was up and running.

The RB-WAV-08 is an ideal platform for interfacing with analog systems through the PI Raspberry platform. The board is high quality, easy to work with, and comes from the factory with an on-board light sensor, potentiometer and LED's to test board functions. On a side note, I had a bit of trouble with my PI 3, unrelated to the RB-WAV-08 board, and customer service from Robotshop responded to my support request in a few hours and I was able to resolve the problem. I followed the instructions downloaded in the documentation package from Robotshop and had the software compiled and working in about 3 minutes. Thanks to the on-board pot and led's I could immediately test the software. Overall, I'm impressed. This is a well supported, high quality board at a bargain price.

The AtoD would shut down on my board after a minute or so of running. I found two problems. First, the board had resistors R14 (100R) and R17 (10K) swapped in position (goes to the /PDWN pin). Second, the provided example software for the ADS1256 does not initialize gpio header pin 13 (GPIO27) which is connected to the ADS1256 /PDWN pin. Pin 13 should be initialized to be an Output and set High, else the AtoD will shut down. When that happens, the ADS1256 example program will print something like "Error, ADS1256 Chip ID = 0x0, ADS156_WaitDRDY() Time Out ...

The A/D portion of this board was recently added to Mycodo - a graphical sensor and controller environment that runs on raspberry pi. https://github.com/kizniche/Mycodo There is a python library that will work with the A/D named PiPyADC https://github.com/ul-gh/PiPyADC Python cannot sample above about 1k samples per second, however lower speeds are required for precision.

The product is original make, and arrived reasonable fast by regular mail. Nothing seems broken. Fits perfectly to raspberry pi. Haven't done actual testing yet, but I don't expect problems from its looks. Thanks guys!