This circuit was found in RCA documentation from the 1980s. The circuit uses LDRs of the time and the 50 uA instrument has zero in the center. R1 and R2 may have 2k2 and R3 10k typically.
This circuit, suggested by Texas Instruments, uses a TIS43 or 2N2646 to produce short light pules. The...
This circuit was found in a 1970 American publication. The FETs are power types according to the...
March 2017 - Vishay's new SiRA20DP N-channel MOSFETs for synchronous grinding applications, DC /...