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How to Use a Transistor Instead of a Relay to Trigger a 555 Timer Circuit

How to Use a Transistor Instead of a Relay to Trigger a 555 Timer Circuit

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#1 21670392 12 Nov 2013 05:51

Andrew Betts Andrew Betts

Anonymous

Post #1
21670392 12 Nov 2013 05:51

Just starting out...

I wish to feed a circuit from another circuit without using the relay (no moving parts wanted)

I have a circuit i found for example:

http://www.electroschematics.com/5132/dark-activated-relay/

and i want to run this circuit for example

http://clarkson-uk.com/555-timer/operation/frames3.html.

I'm sure its simple to most off you

Thanks in advance
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#2 21670393 12 Nov 2013 06:15

Andrew Betts Andrew Betts

Anonymous

Post #2
21670393 12 Nov 2013 06:15

Fogot to say i wish to use 12v dc on the second circuit.

the first circuit the relay is rated at 6V does the voltage drop through the Bc558??
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How to Use a Transistor Instead of a Relay to Trigger a 555 Timer Circuit

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