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.
We found this circuit in a 1994 publication. It makes use of a divider for 16 384 CMOS type 4060. By...
When the sensor, an ordinary photo-transistor, receives light, the relay closes its contacts. The...
The suggestion for using this circuit from an old American documentation is to use small antennas...