This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of components of the era, but modern equivalents can be used.
Found in an RF Design from the 90's this circuit is intended for crystals of less than 1 MHz....
This 1968 Mullard circuit detects fire by smoke using LDR-type sensors. The circuit makes use of...
This circuit can memorize an input signal as a charge on the capacitor. The memorization time...