RC delay circuit

ericgibbs

Joined Jan 29, 2010
18,984
hi m,
Using the datasheet and your figures of 1.3Vg at 15mA, indicates an input load of ~90R.

In LTSpice using that load indicates the SCR will not trigger.
E

Update: In your simulation, try a 470R and a 10uF
 

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