Found in 1980s Radio Electronics, this circuit triggers the ignition of a rocket after the countdown is completed. The countdown is monitored by the sequential lighting of LEDs
The transformer inf this circuit is a 6 or 9 V unit and diodes 1N4002. The filter capacitor is 2...
This complementary transistor stage was found in a 1968 publication. The transistors are germanium types and...
This circuit uses an optical coupler called Raystor created by Raytheon in the 1960s. The circuit...