Emergency Light and Alarm Circuit

Emergency Light + Alarm

…loudspeaker. If SW1 is left open, when mains supply is restored the lamp or the alarm continue to operate. They can be disabled by opening the main on-off switch SW2….

Triac, SCR, Transistor Tester

…or transistor would be indicated by a permanent glow of the LED by itself, i.e. without pressing switch S1 or S5. Triac, SCR, transistor tester circuit come from EFYmag 2001…

Two Station Intercom Circuit Electronic

Two Station Intercom based on LM386

…a 47 ohm series resistor should be added to a supply lead for protection. Download the complete explanation of two station intercom circuit in PDF version: [wpdm_file id=41] Source: Kitsrus.com

Mini UPS circuit

Mini UPS Project

…time. A common step-down transformer delivers 12V of AC, that is rectified by diodes D1 and D2. Capacitor C1 features ripple-free DC to charge the battery and to the remaining…

5-band Graphic Equaliser

5 Band Graphic Equaliser

…document: 5 Band Graphic Equaliser Project 1 file(s) 191.71 KB Download Download datasheet document: LM833N PDF Datasheet 1 file(s) 1.85 MB Download NE5532 PDF Datasheet 1 file(s) 960.82 KB Download

Cheap Motorcycle Alarm

Cheap Motorcycle Alarm

…the stated differential angle. The differential angle is the measure of the “just closed” position to the “just open” position. The tilt switch has characteristics like contacts make and break…

Electronic Rat Repellent Circuit

Low Cost Electronic Rat Repellent

…studying electronics, can try to practice makes this circuit because it is considered easier for beginners. Just the information that the necessary components to built this circuit are very less,…

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