This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
January 2017 - New ROHM TFZV series of zener diodes is now available from Mouser Electronics. The...
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This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response...