This remote control or light-beam operated switch was found in the June 1970 Radio Electronics magazine. Sensitivity is set at R4.
This circuit was obtained in an old Elektor. It is a reference, since the integrated products of the...
The trigger shown in the figure, built around a 4093 can generate pulses that reach 1 hour with a...
This circuit has the transistor chosen according to the maximum current desired at the output. Unlike...