Wednesday, August 17, 2022

ANTI-COLLISION REAR LIGHT

During poor visibility, i.e., when there is fog, or at dawn or dusk, or when your vehicle gets stalled on a lonely stretch of a highway, this flashing light will provide...

LAPTOP PROTECTOR

Protect your valuable laptop against theft using this miniature alarm generator. Fixed inside the laptop case, it will sound a loud alarm when someone tries to take the laptop. This highly...
Simple Stereo Power Amplifier With 7905

Simple Stereo Power Amplifier With 7905

79xx is a widely known series of low-cost, fixed-negative-voltage regulators. These integrated circuits are available with output current of 100-150 mA (L series), 0.4-0.5A (M series), up to 1A (standard series),...

Night Lamp From Scrap CFL

Compact fluorescent lamps (CFLs) are available in different shapes and power ratings. These consist of an electronic ballast circuit and a programmable-logic-controlled tubelight. Most CFL manufacturers offer a guarantee of half...

Multicolour Curtain Backlights

This circuit comprises two parts: a string of 5mm high-intensity white LEDs connected in series and the circuit wired around. IC CD4060 with an inbuilt oscillator. The IC is wired such...

SAFE CIGARETTE LIGHTER POWER SOCKET

Cigarette lighter sockets available on the dashboards of some vehicles act as a heat source to light cigarettes. Besides, these can power electronic gadgets like tablets, laptops, portable video players, MP3...

PORTABLE SIGNAL WAND

Flashing lights have varied applications. For example, travelers can use these as warning beacons on highways to catch the attention of the public in case of an emergency. Described here is...

Door-Opening Alarm

Children are at a high risk of drowning in a swimming pool. Majority of accidents occur when children get into a pool unsupervised. Such situations can be avoided by attaching a...

Door Alert

This circuit can be operated by any kind of switch. For example, it can be used in a shop to warn that a customer is waiting, with a micro-switch attached to...

Doorbell-controlled Security Switch

One way to check whether anybody is at home is to ring the doorbell. Burglars too use this very technique. The circuit described here comes handy in such a situation. It...
 
 

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