Lamp LI stabilizes the loop gain at higher frequencies while the limiting action of R2, CRI, and...
This nonlinear, passive filter circuit rejects ripple (or unwanted but fairly steady-voltage)...
Al and A2 are two sections of a quad comparator. The first, Al, functions as an amplifier and...
The transmitter for the wireless headphones is built around a CD4046 CMOS phase-locked loop,...
This is the door bell circuit with flashing LEDs to make the circuit more attractive. IC1 (NE555)...
Oscillating circuit (coil) are made on a ferrite bar. If you wish to listen long waves winding...
The sound produced imitates the rise and fall of an American police siren. When first switched on...
Components like resistors R1 and R2, capacitors C1, C2, and C3, diodes D1 and D2, and zener ZD1...
In most of the industrial processes it is required to rotate DC (or AC) motor forward and reverse...
The 555 circuit can be re-triggered if the input is held low longer than the output pulse. To...
Using a single 555 Timer IC and a small transformer to generate a high voltage, this circuit will...
AC by VDI ~ VD4 full-wave bridge rectifier output pulsating DC power for four lights. Rl, R2, VD5...
Cutter is protected by a printed circuit phototransistor constructed to prevent manual feeding...
DC voltage present on the telephone line is usually about 45 to 50V, on-hook and off-hook to 6V....