time shift pulses (see picture)

ScottWang

Joined Aug 23, 2012
7,397
The 555 triggers on a negative going pulse so you don't want Q2. It will cause U2 to trigger at the start of U1's output pulse instead of at the end of the pulse as needed for the 10ms delay. Just remove R5, R6, and Q2 and connect C4 directly to U1-Q.

A simulation of the circuit would have spotted that problem. ;)
Thanks for pointed out the error.
You are right, I copied the circuit and forgot to redraw the parts of the circuit.
If plus the transistor, it will lose the 10 mS delay.

 

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