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
In the figure we have an interesting possibility that consists of the activation of a heating...
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
We found this configuration in documentation from the 1970s, but all components are current. If a...