This circuit is from an old American documentation. The circuit generates 20 to 200 ms steps for stepper motors.
This circuit, obtained in a 1983 magazine, can drive loads up to 100 mA if the transistors are...
It is possible to design a monostable multivibrator around a voltage comparator of the four...
This voltage inverter circuit is from a Radio Eklectronics from October 1965. It was used in...