Hi,
I was looking for a possibility to switch ε24 (actually, β24) on and off using 12V trigger signal, since ε24 doesn't offer this feature. Ti's idea was to drive a relay which would act as a momentary switch for the ε24.
Played with NE555 first, but couldn't produce an impulse when switching off.
Here is a possible workaround (found this circuit and adjusted it a bit):
The relay engages for a second when 12V voltage is applied or removed and can trigger ε24. It seems to work fine, unless the voltage fades out, then there is no action.
Any suggestions for improvement?