Questions tagged [analog-to-digital]

For questions pertaining to signal conversion, either through hardware or software.

21
votes
6answers
31k views

How can I connect an analog to digital converter (ADC)?

I'm looking at options for ADC on the Rasbperry Pi. I'm wondering what is possible so far. Of course easy and cheap is good.
0
votes
1answer
492 views

Raspberry Pi Current & Voltage Sensors (10A rating and ~40V respectively)

I've been searching through multiple forums, and gone to different links online trying to find a "cheap" solution to my question. I am currently trying to monitor the current and voltage of an ...
4
votes
2answers
2k views

What is the best way to increase digital I/O lines on Pi?

In one of my projects I need six PWM outputs, 12 digital I/O and around six analog inputs to be controlled by a Raspberry Pi. What are some of the best options available to increase the I/O capability ...
10
votes
2answers
5k views

What Analog to Digital Converters Are Available For RPI?

I am interested in obtaining an ADC (Analog to Digital Converter) or Analog input for the Raspberry Pi. I understand that various boards exits to use an Arduino as input to the Pi and that Libellium ...
3
votes
1answer
3k views

Using Pi's built-in audio as general-purpose DAC?

Any common Audio output on any electronic device is in essence a two-channel Digital-to-Analog converter, where the voltage sent to each of the channels (Left, Right) powers the electromagnet that ...
16
votes
8answers
35k views

Is Pi powerful enough for an oscilloscope project?

My goal is to make Pi based instruments, starting with an oscilloscope. So I read answers to What Analog to Digital Converters Are Available For RPI? How can I connect an analog to digital converter ...
1
vote
1answer
59 views

How to read ADC with low restance range

Does anyone have any ideas on how I can use RPI with ADC to measure a tank level sensor which has a range of only 20 to 200 ohm.
6
votes
1answer
2k views

AD7705 analog to digital converter with RPi, viable?

I have a couple of AD7705 chips I'm attempting to use with my RPi to read the analog pins from a sensor that spits out 0~4V. Nice, detailed datasheet for the ADC is here: http://www.analog.com/...
3
votes
2answers
343 views

Can I do anything with a pre-wired photo resistor and no additional A/D converter?

So I have this SunFounder Photo Resistor module: https://www.sunfounder.com/learn/sensor-kit-v2-0-for-raspberry-pi-b-plus/lesson-20-photoresistor-module-sensor-kit-v2-0-for-b-plus.html Until five ...
0
votes
1answer
279 views

Interface AD7193 with Raspberry Pi

I have been trying to interface an ADC with raspberry Pi namely AD7193 via SPI . For that I have enabled my SPI and installed spidev on my pi. but i dont know what to do next in order to get the ...
0
votes
0answers
205 views

How to connect sensor to Raspi via poor man’s a/d converter?

TL/DR: I’m using this and there are things I don’t understand about this circuit. Ultimately I’d like to read data from this sensor, but all I get is gibberish. Please, help. I have set up “poor man’...