Laser source diode (CB7840E)

This circuit for battery powered laser diodes was found in a 1992 RE Experimenters Handbook. The circuit uses common components today.

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Zener Tester (CB24999E)
The purpose of this circuit, which we found in the November 1986 Radio Electronics issue, is to...
Low Noise Crystal Oscillator (CB6151E)
This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...
Switching Regulator (CB5450E)
This switching regulator circuit with less than 100 mV ripple was found in a 1980s documentation. The...