Motor Power supply design

Discussion in 'General Electronics Chat' started by GoswamiG, Jun 7, 2016.

  1. GoswamiG

    Thread Starter New Member

    Aug 26, 2015
    Dear all,
    I am working on my new project . This project haveone ATMEGA 328 P and motors . I was trying to run the motor & controller on the same supply but controller get reset. it is a well known problem but my project cannot afford 2 power sources So I need to design anew power supply

    can anyone suggest a relevant tutorial or design I can follow for supply design.

  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    Keep motor ground and circuit ground separate except where they come together at battery.
    Monitor voltage when motor starts. Powersupply must be able to source this current without voltage sag. If voltage drops when motor starts. Redesign using higher current capable supply
  3. dannyf

    Well-Known Member

    Sep 13, 2015
    Isolate the mcu's rail from the motor's rail. It can be done via a resistor + capacitor, or a diode + capacitor, or a regulator.... all depends on what's available to you.
  4. GoswamiG

    Thread Starter New Member

    Aug 26, 2015
    thank you for your reply,
    let me add my circuit details. please find attachment I think the SMPS used should not create the problem as it is very stable. (expecting so)

    fo I need to design a new supply so what are points should I consider for designing such power supply ?? ????2??
    @Kermit2 I will check the voltage drop tomorrow I will check
    thank Rgds