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| General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion? |
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Thread Tools | Display Modes |
24th April 2004, 02:35 PM
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New Member
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Whats the switch?!
my mate steve handed me this zn1034 timer circuit last thursday, and asked me to make it for him
 can anyone tell me what the highlighted switch does in the circuit???! |
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24th April 2004, 04:44 PM
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Experienced Member
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Don't quote me on this but it looks like a manual override. Both the output of the timer and the switch are connected to an npn transistor which in turn controls (what I believe to be ) a relay coil with a reverse diode shunt. Ya throw the switch and it applies the pos supply thru a 1K resistor to the transistor base.
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24th April 2004, 04:56 PM
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New Member
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no, the coil, is a solenoid
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24th April 2004, 05:04 PM
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Experienced Member
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well then the switch may be a manual trigger then.
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Linear Mode
