Timer circuit

Jan 25, 2007 1 Replies

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P.Webb 19 years ago

Hi All, I want to make a time delay circuit using transistors,

12v supply switch on a 3Watt bulb and go off after about 3 seconds if possible, I don't want to use a relay or 555 and I would like to use pnp ZTX 751 transistors which I have plenty of ! Thanks.....Peter

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Jonathan Kirwan 19 years ago

Peter, since I recently posted something close to what you want, I'd like to save time and suggest that you might try something like the following:

I haven't looked at the data sheet for the Zetex part, though. I'm assuming that you already know it can handle the 3W load.

Jon

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