This circuit is from an ancient American documentation. The transistors are of the time and the circuit uses a special sensor to detect the trigger point to produce spark plugs.
This circuit was found in an American publication from 1965. The circuit uses components from that...
This circuit prevents damage by accidentally reversing the power supply polarity. The circuit is...
A square signal of about 1 kHz is produced by this astable multivibrator. Frequency is determined...