I need some electronics for a magic show, but unfortunately all I really know is that you need to form a circuit to make things work.
For the show, I need to press a secret button, which makes a circuit with the device and a 12volt battery,, and of course activates it (easy enough, even for me).
Now the hard part is, I'd like it to turn itself off/break the circuit after 15 to 30 seconds. Ideally I'd like some kind of countdown timer which I can put in between the switch and device, which automatically disconnects itself 20 seconds after a charge starts going through it.
If anyone could give me any advice it would be appreciated, although I should mention again that I really know very little about electronics, so I might not understand a lot of common terms, ect.
Thanks
For the show, I need to press a secret button, which makes a circuit with the device and a 12volt battery,, and of course activates it (easy enough, even for me).
Now the hard part is, I'd like it to turn itself off/break the circuit after 15 to 30 seconds. Ideally I'd like some kind of countdown timer which I can put in between the switch and device, which automatically disconnects itself 20 seconds after a charge starts going through it.
If anyone could give me any advice it would be appreciated, although I should mention again that I really know very little about electronics, so I might not understand a lot of common terms, ect.
Thanks