How to create a master switch for 2 different circuit?

Projects General Guidance
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Hey guys,

As the title suggests, i have a physical switch that i would like to use as a master switch for my project.

I would like to, with a flick of the switch turn on two different sets of component:

  1. Arduino Uno (with components attatched to it) with 9v battery.
  2. some Servo motors and a motor module connected to 12v battery.

How do i go about connecting the switch since i am using 2 separate battery sets?

Thanks in advance!

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I guess theres no other way to do it except for dpdt switches huh! Thanks you for your reply!

4

Or ...

Use your switch to operate a relay off the 12v supply - it can face two sets of contacts that can switch your two devices ..

Or ..

Power up your Arduino with the switch , then get a digital output to switch a transistor to in turn switch your other devices

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hammy:
Power up your Arduino with the switch , then get a digital output to switch a transistor to in turn switch your other devices

Thats a great idea. Thanks alot!

spycatcher2k:
You asked for A solution, not a list of possible solutions!

Please be more specific in your questions next time.

Sorry about that! I thought that i had explained myself properly when i linked the picture in the original post. I'll make sure to be more specific next time.

I'll do the transistor method. Thank you for the reply!