Dual-voltage power supply is required especially for powering the op-amps and some of the instrumentation amplifiers. A few low-power audio pre-amplifiers also use dual-voltage supply. This circuit provides both +9V as well as -9V supply from a single 9V battery. It consists of timer IC NE555 (IC1), negative-voltage regulator IC… Read more »
This circuit lets an external 12V SLA battery power a camcorder which normally has an inbuilt 7.2V battery. Such batteries can now be very difficult or expensive to obtain for earlier model camcorders. In essence, the circuit is a standard LM317 adjustable regulator with resistors R1 & R2 set to… Read more »
The halogen or krypton bulbs in modern torches (USA and Canada: flashlights) have a limited life and are not particularly cheap. A simple modification in the torch lengthens the life appreciably. It is a fact of nature that any incandescent bulb has a ﬁnite life. However, the bulbs in modern… Read more »
This circuit was purposely designed as a funny Halloween gadget. It should be placed to the rear of a badge or pin bearing a typical Halloween character image, e.g. a pumpkin, skull, black cat, witch, ghost etc. Two LEDs are fixed in place of the eyes of the character and… Read more »
2003 Peugeot 306 Under Dash Fuse Box Diagram 2003 Peugeot 306 Under Dash Fuse Box Map Fuse Panel Layout Diagram Parts: brake pedal position, data link connector, electronic control unit, fuseible link, hydraulic modulator, ignition switch, instrument panel, pump motor, pump motor relay, wheel speed sensor, ABS warning lamps, battery.
1998 Infinity Q.45 Engine Fuse Box Diagram 1998 Infinity Q.45 Engine Fuse Box Map Fuse Panel Layout Diagram Parts: ASCD actuator, daytime light cancel relay, wiper amplifier, fusible link and relay box, cooling fan, starter relay, wiper motor, actuator, battery, daytime light, power transistor, power transistor unit, headlamp relay.
2002 GMC Envoy Rear Underseat Fuse Box Diagram 2002 GMC Envoy Rear Underseat Fuse Box Map Fuse Panel Layout Diagram Parts: Right Rear Parking Lamps, Lock, Left Rear Parking Lamps, Auxiliary Power, Left Turn Signal, Radio, TR PARK, Right Turn Signal, Rear Fog Lamps, Door Control Module, Fog Lamps, Power… Read more »
2004 Chrysler Pacifica Power Module Fuse Box Diagram 2004 Chrysler Pacifica Power Module Fuse Box Map Fuse Panel Layout Diagram Parts: battery thermal guard, battery, intelligent power module.
2000 Cadillac Escalade V8 Front Fuse Box Diagram 2000 Cadillac Escalade V8 Front Fuse Box Map Fuse Panel Layout Diagram Parts: ground, courtesy lamp feed, ignition switch, battery, fuse output, delay accessory bus relay output.
2004 Pontiac Aztek Fuse Box Diagram 2004 Pontiac Aztek Fuse Box Map Fuse Panel Layout Diagram Parts: PCM relay, ABS system, trans solenoid, fuel injection, low beam, high beam, park lamps, air pump, ignition main, cruise control, ABS system, cooling fan, battery, fuel pump, A/C cluster, engine control.