The CA3020 integrated circuit was one of the first commercial types, sold in the 1960s. The circuit presented is from 1968 using a power stage with RCA transistors of the time.
This circuit was taken from a Popular Electronics from the 1990s. The circuit triggers a relay that...
This circuit is intended to trigger an auxiliary flash with a xenon lamp as it is still used by...
This bargraph-type circuit employs a not very common integrated circuit today, but can be adapted...