MOSFET trigger (CB21480E)

This circuit was found in a 1967 Electronic Design. FETs are from the time, so modern equivalents can be used.

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Multimeter EM53 (CB18411E)
This is the circuit of a commercial analog multimeter - voltmeter, sold in Japan in the 1960s. The...
5 A Regulator with Protection 7800 (CB14534E)
This circuit, for 78xx series integrated devices, is suggested by Motorola in its 1990 Linear...
Coaxial Driver (CB13426E)
We found this circuit in a 1972 publication. The circuit is indicated for the application of TTL...