Failed Prototype: VAmeter v3

Just a few days ago the PCBs for VAmeter v3 came in.

VAmeter is a simple board that connects to your existing power supply and shows the volatge, current, etc.

Upon building, the major fault was discovered. There was no connection to the input voltage so the unit is unable to measure the input voltage. It is only able to measure the current.

However, This can be fixed by adding two more flying resistors to the board, but that makes the PCB design a failure.

Faulty Schematics

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11 Responses

  1. Vanja says:

    Hi my friend Arup.
    Thanks from this SCH.
    Please does the HEX file is same like from version V 2.0.?
    On SCH, I do not see crystal?
    How do I need to set up FUSE from burning ATMEGA8.?
    Best Regards

  2. Vanja says:

    Thank my friend.
    But, for this unit v3.0 is the hex file MAIN.HEX or it is different ?!
    Best Regards and have a nice day!
    Vanja

  3. John says:

    Hello,
    I have tried to make a breadboard of V2 but I only have an atmega328p chip. Is there anyway I can alter the code to use this chip?
    I can program the atmega328p with AVRDUDE but there is nothing showing on the LCD.
    Any suggestions would be appreciated.

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