Parts Required Semiconductors: T1 - Transistor BC548 T2 - Transistor BC558 Resistors(all 1/4W, ±5% carbon): R1 - 270 Kilo- ohm R2 - 10 Kilo-ohm Capacitors: C1 - 0.1μF,Ceramic disk Miscellaneous: S1 - SPDT Toggle(On/Off) Switch LS - 8Ohm,1Watt Loudspeaker Battery Holder Printed Circuit Board(PCB) The…

This circuit is designed to run any regular CFL or LED bulbs up to 32 watts. You can try using a higher wattage bulb or changing the transformer. The power supply voltage (Vin) is usually 12 volts. The output of this circuit is fed to…

Circuit Diagram Parts Required The circuit shown in the presentation will sound an alarm endlessly until the circuit is switched off. The circuit shown at the top of this page is used to cut off the alarm automatically after a few seconds or minutes. Alarm…