Raspberry Pi High-Precision AD/DA Expansion Board

WaveshareSKU: RB-Wav-08
Manufacturer #: 11010

Price  :
Sale price $46.99

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Stock  :
In stock, 9 units

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Description

  • Onboard ADS1256, 8ch 24bit high-precision ADC (4ch differential input), 30ksps sampling rate
  • Onboard DAC8552, 2ch 16bit high-precision DAC
  • Onboard input/output interface via screw terminals, for connecting analog/digital signal
  • Features AD/DA detect circuit, easy for signal demonstration

Raspberry Pi High-Precision AD/DA Expansion Board

There's no AD/DA function on the Raspberry Pi GPIO interface, this may trouble you in the Pi development. However, it won't be a problem anymore. The Raspberry Pi High-Precision AD/DA Expansion Board allows you to add high-precision AD/DA functions to the Raspberry Pi.

Raspberry Pi High-Precision AD/DA Expansion Board

  • High-Precision AD/DA Board x 1
  • RPi screws pack (2pcs) x 1
  • Weight: 0.032 kg

Raspberry Pi High-Precision AD/DA Expansion Board

ZIP File

  • Raspberry Pi GPIO interface : for connecting with the Pi
  • AD/DA input/output : screw terminals
  • AD input : pinheaders, the pinout is compatible with Waveshare sensor interface standard, easy to connect various analog sensor modules
  • 7.68M crystal
  • LM285-2.5 : provides reference voltage for the ADC chip
  • Photo resistor
  • LED output indicator
  • 10K potentiometer
  • DAC8552 : 16bit high-precision DAC, 2ch
  • Power indicator
  • ADS1256 : 24bit high-precision ADC, 8ch (4ch differential input)
  • ADC testing jumper
  • DAC testing jumper
  • Power selection jumper
  • ADC reference ground configuration : when AD single inputted, the AINCOM is reference terminal, can be connected to GND or external reference voltage

Supported Pi

  • Raspberry Pi 1 Model A+
  • Raspberry Pi 1 Model B+
  • Raspberry Pi 2 Model B
  • Raspberry Pi 3
  • Raspberry Pi 3 Model B+
  • Raspberry Pi Zero

Raspberry Pi High-Precision AD/DA Expansion Board

Customer Reviews

Based on 9 reviews
78%
(7)
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(0)
22%
(2)
0%
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0%
(0)
M
MITCH
Good Hardware, Docs and S/W Lacking

The hardware worked as advertised *after* I spent several frustrating hours deciphering the schematics and writing my own Python drivers to talk to it. If the board came with solid docs and code, I would have given it a 5. If you're looking for Python interface code, I've open sourced mine which makes use of 2 other projects (one for the ADC, one for the DAC). https://github.com/makahn64/waveshare_a2d_d2a_python

B
Brian
Great product. Easy to use

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

M
Metin
Great Product, Great Service!

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!

D
Dave
A couple of glitches

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 ...

K
Kevin
As described, fast shipping.

Nice board, didn't use it with a pi but with a Cypress PSOC 4.

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