One Shot Circuit Created by Constant Voltage Supply

Thread Starter

James Gatsby

Joined Jul 8, 2010
1
Hello,

I'm trying to understand how the circuit below creates "one-shot" functionality. If the control voltage is maintained (110VAC), the circuit is supposed to provide a one-shot. If the control voltage is removed, the one-shot may be applied again. It appears to me that the control voltage will be maintained indefinitely after being applied - I can't see how this circuit will provide a one-shot. I do not have magnitudes available for the resistors, capacitors, and relay coil. Any help is appreciated

2017-10-16_11-45-11.jpg
 
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