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A switch for two sources

  1. Jul 20, 2011 #1
    Hello, on my robot I essentially have two sources of power.

    #1. The first is my 9-volt battery to the BS2. (+ pin 24, - pin 23)

    #2. my second is a power source for the motors. it uses four C batteries not directly connected to the stamp but with it's own system of circuitry. check thumbnail below.


    Now I plan to use a fairly simple three-pronged switch to turn the entire robot on and off. I believe that I will need to put the switch into the negative wire of the #1 power source ( cathode of 9-volt battery to pin 23). However, what about the second power source? Is there any way that I can tie both in to the same switch?

    On the other hand, I'm not quite sure if I need a switch for the second source. Perhaps all the transistors will take care of it.

    Any thoughts? I'm thinking that last paragraph is correct and that a second switch or a tie-in won't be necessary.
  2. jcsd
  3. Jul 21, 2011 #2
    You could use a dual-pole single-throw (DPST) switch to control power for both things using one switch.
  4. Jul 21, 2011 #3
    ok thanks
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