Single Power supply with multiple output powers

Other Hardware Motors, Mechanics, Power and CNC
1

Hi Everyone,
i am trying to run several different components from the one adapter.
my adapter plugs into the wall and gives an output of 12V, 3A
from that i want to

  1. run my arduino

  2. run a bunch of servos

  3. run a 12 volt motor

  4. i need to reduce the 12V to 5 for the arduino and servos however i don't think i want them on the same circuit because the servos will draw to much current that could damage my arduino so i need to split them into 2 different circuits i think

  5. i need to run my 12 V motor which is being controlled by a relay wired to one of the arduino pins

for the servos and 12V motor, i want lots of power however for the arduino i have read that i only need around 5V 0.5 A

so just to make sure that was clear
result needs to be

  1. arduino 5V, 0.5A
  2. Servo's 5V, 3A
  3. 12V Motor 12V, 3A

i feel like this is a really stupid question and the answer is just a resistor or something, i just cant seem to find the answer, sorry if it is.

Thanks in advance
James

2

Your adaptor is only rated at 3amps, you have listed the motor itself will take 3amps, see a problem :wink:

3

apologies
motor is rated under load at 1380mA

4

One way is to get three 2 amp diodes and attach the anodes to +12.
Next attach three 1000uf (with 18 volt or more rating) capacitors to each cathode with the negative sides all going to 0volts.
You now have three legs that can be regulated as needed.