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
We found this circuit in the November 1985 issue of Radio Electronics magazine. It uses TTL...
The basis of this circuit is a CA3130 operational amplifier. The transistor can be BC548, and the...
This circuit switches off a load in case of excess current acting as a fuse. The circuit is from a...