Voltage and current display

Discussion in 'General Electronics Chat' started by Dr.killjoy, Oct 25, 2014.

  1. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
    I am working on a constant current load and I want to add a 2x16 led backlight display .. With the display I want to be able to see the voltage,current,and the total watts being generated .. I have never dealt with being a display like to known where to begin ?? I have read a couple display voltage and current articles but I need the watts too so I don't overload the heatsink with too much heat..

    Jay Sr
  2. MrChips


    Oct 2, 2009
    I assume you mean a 2-line x 16-character LCD display.
    This is a very practical project.
    You will need a microcontroller to output to the display.
  3. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    My choice was to just drop some of these into the project.

    Personally, I'd use more then 2 lines to display 3 variables. But yeah, most any micro, some current shunts (like the EBay model has), perhaps a high side current shunt IC, and a voltage reference.

    I'd put some buttons inside the case so you can do an electronic calibration, which assumes the micro has some EEPROM too. Most do.