This detector with ultra-low deviation was found in an American documentation from the 90s. Operational amplifiers are from that time. The power supply must be symmetrical.
This circuit was found in an American 1980s documentation. The components are current but most...
This circuit, suggested by Texas Instruments, uses a TIS43 or 2N2646 to produce short light pules. The...
This circuit is from a Popular Electronics from 1993. The magazine is no longer printed, but the...