This sophisticated circuit was found in the November 1978 issue of Radio Electronics magazine. Based on CMOS logic, it has several types of timing, controlling the wiper relay.
This circuit was taken from old American documentation. The transistors used make it possible to...
This oscillator uses a general-purpose transistor that can have BC548, BF494 or 2N2222 equivalents and...
This circuit of a 73 American magazine from the 1990s can generate multiple frequency signals from the...