Add Bluetooth Activated Switch (transistor) to Circuit

Thread Starter

rcullens

Joined Apr 26, 2008
15
Hi all I was wondering if it would be possible to us one of those bluetooth key locaters like tzumi tag it or magic finder to activate a transiistor to be used as a switch to turn this circuit on and off? If so what type of transistor would i need? The BT devices both have audio outputs as well as leds that flash that i could tie into to turn on the transistor therefore closing tthe circuit below correct?



 

Dodgydave

Joined Jun 22, 2012
9,320
The same way, you feed a positive voltage to the gate, and the drain pulls down to the source, its the same principle.

If you have an audio output you will need to rectify it to a dc voltage.
 

Thread Starter

rcullens

Joined Apr 26, 2008
15
I think the place to tap would be the flashing led that only flashes when you trigger it to from the phone, i want the on off effect to toggle if you get what i mean?
 
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