This interesting transistor circuit has several effects and an included amplifier. The circuit is monophonic and powered by standard batteries. The number of keys can be changed.
This source can supply currents up to 1 A. The circuit is from Motorola's 1993 Linear Interface ICs....
The presented circuit uses a window comparator to keep a relay activated only when the sensor is...
The SCR sector of this circuit can be powered by high voltage AC and instead of the LEDs we can...