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Arduino like design verification

Discussion in 'Microcontrollers, Programming and IoT' started by G1234, Dec 2, 2017.

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  1. G1234


    Nov 29, 2017
    Because I am a software dude, I would like some help verifying this minimal Arduino based circuit which I designed with some changes.

    It is single AAA cell operated (NiCd or Alkaline), needs to be very energy efficient.
    4 push buttons, each can wake it up from sleep using Pin Change Interrupt on port D.
    Once awake the circuit should read which switch woke it,
    A visible light Phototransistor whose analog value can be read.
    A tact switch whose on/off value can be read.
    Output is done by blinking an LED using PWM.
    The software (including Arduino boot loader) needs to be burned over SPI using USBTinyISP.
    The FTDI port is for Arduino IDE debugging.

    Are there errors in this design? Anything missing? Anything can be improved?
  2. G1234


    Nov 29, 2017
    Updated with internal pull ups and disconnected pin 6 from Vcc. fi.png
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