Linked Questions

4 votes
2 answers
1k views

Reading Voltage Input on ADC

I'm thinking of using the Waveshare ADC board with a RaspPi 3 to monitor the current driving a DC brushless motor. I've run through the waveshare examples, and I can handle reading inputs ...
CDog's user avatar
  • 41
2 votes
2 answers
1k views

How can Rpi read ADS1256's negative values?

I'm using this Raspberry Pi High-Precision AD/DA Expansion Board from waveshare. I have some questions regarding its ADC (model name: ADS1256) unable to give out negative value. Specifically, only ...
Jihun Kim's user avatar
0 votes
2 answers
871 views

How to detect low amp AC current with GPIO

There is switch inside a commercial gate operator that I need to monitor with my RasPi. The switch has two ~18 AWG wires, when the switch it closed, it's 50V AC connection. When the switch is open, ...
RockWest's user avatar
0 votes
2 answers
1k views

Detecting Voltage With a Raspberry Pi

I want to use a Raspberry Pi to detect whether a generator has started. I had planned to hook a 5V power supply to 1 of the 240V legs on the generator and then run that through a 3.3V voltage ...
David Green's user avatar
0 votes
2 answers
668 views

Turn a Raspberry Pi into a voltage tester

I would like to create a voltage tester like the one described in this video, using 555 ic, and then connect it to Raspberry Pi, in order to log the frequency a 220V waterpump is switched on. My ...
Marinos An's user avatar
3 votes
1 answer
813 views

Strange I2C behaviour

First of all: sorry for the title, I don't know how to describe further... Background: I'm working with the RDA5807M FM receiver chip. It worked fine for at least one month now. I just had jumper ...
linusg's user avatar
  • 432
2 votes
1 answer
7k views

ECG monitoring using ADS8232 and MCP3008 noise problem

I am making a project of Real-time ECG monitoring device using Raspberry Pi 3B+, Heart monitor AD8232 sensor by Keyes, MCP3008 ADC and 7" HDMI LCD. I am giving supply to RPi using 5V DC charger ...
Umer Farooq's user avatar
1 vote
1 answer
2k views

Reading Temp/Pressure with a single Raspberry Pi

I would like to be able to read values of two thermal couples and a pressure gauge using my raspberry pi. Recording the data and then sending it to a server at the end of the day. I am using dual t/...
Max's user avatar
  • 13
1 vote
1 answer
400 views

Can't read the analog channels from my ADC board using raspberry pi I2C

It seems like the ADC I am using does not provide instructions about how to communicate with the pi using the I2C interface. Does that mean I can't use I2C? I have the register addresses for all the ...
Yukti Kathuria's user avatar
0 votes
1 answer
929 views

How can Rpi I2C read a Coulomb Counter, up to 18V, 10A?

I"m building an autonomous boat with a solar panel. The heart of the boat is a Raspi zero which contains a small program doing the navigation. I've got a 3S li-ion battery of which I'm already ...
kramer65's user avatar
  • 305
0 votes
1 answer
724 views

Reading Output signal from external circuit using Rpi GPIO Pin

I am trying to read a signal coming from an external circuit thru the use of raspberry pi's gpio. the signal I am trying to read is a 3.3V signal coming from a voltage divider circuit. this circuit ...
Rikku's user avatar
  • 19
1 vote
0 answers
295 views

How to read AC current sensor (10,12 channel's)

I have a python program which needs to read the power, voltage and current. (Raspberry , I2C & CT Sensor) Please explain whether Arduino is required if we are using Raspberry. Is it possible to ...
sethu's user avatar
  • 11