SCR Optical Full Wave Control (CB13766E)

This shield circuit, from a documentation from the 70s, employs an optocoupler with two SCRs to control a small load of 1.5 W.

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4046 Wide-Band VCO (CB25754E)
Found in the August 1994 issue of Electronics Now, this CMOS circuit uses the 4046, which is...
Under Temperature Alarm (CB12155E)
We found this circuit in an English publication from 1982. The power MOSFET can be of any type and the...
27 MHz Oscillator (CB24983E)
This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low...