Balanced Modulator MC1594 (CB14588E)

This circuit is from the Motorola Linear Databook from 1990. The integrated circuit used is uncommon today.

RMS to DC Converter (CB25352E)
This circuit is from a Radio Electronics magazine from August 1990. The circuit uses components from the...
Car Thermometer (CB24759E)
The circuit we show is part of an article that taught its complete assembly. The article is from...
Polarity Indicator (CB17361E)
This ultra-simple polarity indicator uses common green and red LEDs and can work with 3 to 9 V...