These circuits were found in the February 1995 issue of Electronics Now magazine. The circuits have normal response in (a), boost in (b), cut in (c), and plate response in (d).
Small time intervals up o some minutes can be achieved with this circuit. Only incandescent lamps...
Light falling on the transistor changes both the mark and the space of the generated signal thanks to the...
The frequency of the square signal produced by this circuit depends on the light falling onto the...