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
This circuit appears several times in this section and on this site, obtained from different...
We found this circuit in a 2002 documentation. What it does is put in a reduced power outlet for...
In the figure we have the diagram of an amplifier stage using transistor and a 6AQ5 valve. The...