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Turning a "switch" off when voltage present

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Kevin
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Last seen: 4 months 1 week ago
Joined: 26/12/2017 - 09:58
Turning a "switch" off when voltage present
For a project I'm working on, I want to be able to turn a "switch" (eg, a transistor) off when a voltage is present in another part of the circuit.
 
Is there a way of doing this?
 
TIA,
Kevin

SOLVED: Problem solved: nand gate (Can't post a reply with my phone)
Ashutosh Bhatt
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Last seen: 1 week 3 days ago
Joined: 21/12/2010 - 15:59
ok congretsbut I didnt get

ok congrets

but I didnt get you exactly!

what was your problem? what you were trying to do? and what you get as solution?