The Dual Channel Voltage and Current Monitor (aka: VoltsAmpsLogger) project was created as I needed a way to look at the voltage and current going into an Adafruit Powerboost 1000c module and through the soft switch circuit that I built from Mosaic Industries Raspberry Pi ON/OFF Power Controller. I wanted to be able to monitor the voltage and current coming out of the controller and going into the Raspberry Pi.
The project is based on the Adafruit INA219 High Side DC Current Sensor Breakout and a Raspberry Pi Pico. The Raspberry Pi Pico is a bit overkill for this project, but I have a few on hand so that is what I choose to use.
The project includes a Windows Desktop Application for plotting the measurements, which allows one to see how one channel may impact the other channel.
Sample capture from the Windows Desktop Application
See the GitHub Pages for the latest code and more information.22 March 2023 Update
The Windows Desktop application has several improvements that making it more stable.
- Fixed issue with random code crashes that would occur after the application had been running for awhile.
- Finding the meter is more stable and finds the meter on load.
Below is a capture of the Raspberry Pi Zero powering on using the Soft Latching Power Switch documented at https://teelsys.com/soft-latching-power-switch-revisited/. Channel 1 is the power going into the Soft Latching Power circuit and Channel 2 is the power out from the Soft Latching Power circuit and PowerBoost 1000C.
Power into (Channel 1) and out of (Channel 2) the Soft Latching Power Switch and Adafruit PowerBoost 1000C