2N4988 and 2N4989 (IP058E)

SUS (Silicon Unilateral Switches) with a 8 V trigger voltage used in the controlo f SCRs and other applications.

Vox (CB9423E)
This relay triggered by voice or by another sound was found in an Elektor from the 90's. The...
12 V regulator with 1 A (CB9155E)
Found in an EDN from the 90s, this regulator makes use of the integrated circuit of the time. The...
Touch Switch (CB16251E)
This circuit consists of a design improvement that we have previously published (1982), obtaining a new...