This circuit came out in a 60s RCA documentation. The circuit uses common lamps and LDRs but can be implemented with LEDs.
We found this circuit in the March 1976 Radio Electronics magazine. The circuit is very...
This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms...
This circuit found in an American documentation from 1964, alters the duration of a pulse and can...