Monday, May 16, 2022

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...
Emergency Light

Portable Emergency Light Using Power Bank

This portable emergency light is based on a DC-to-DC booster module and a power bank. The emergency light is designed to provide sufficient illumination in case of mains power failure. Generally,...

MOBILE BUG

This handy, pocket-size mobile transmission detector (Mobile Bug) can sense the presence of an activated mobile phone from a distance of one and a-half metres. So it can be used to...

Friendly Charger for Mobile Phones

Most mobile chargers do not have current/voltage regulation or short-circuit protection. These chargers provide raw 6-12V DC for charging the battery pack. Most of the mobile phone battery packs have a...

Auto Muting During Telephonic Conversation

Telephone conversation can be made disturbance-free using this simple circuit. As soon as you lift the telephone handset to converse, the TV, music system or any other appliance that may be...
Flashing Headlight for Mobikes

Flashing Headlight for Motor bikes

The dipper for a vehicle’s headlight changes the light from high beam to low beam or vice versa given a particular set of road conditions. The shifting of light from high...

Cupboard light

Here is a simple circuit that can temporarily illuminate your cupboard or other such usually dark places where mains connection is either not possible or not worthwhile. The circuit is nothing...

Musical Water Shower

Won’t it be nice to have music playing in the background all the while when you take a shower? This simple circuit does the same. It plays different tunes repeatedly for...
Automatic Heat Detector

Automatic Heat Detector

This automatic heat detector circuit uses a complementary pair comprising NPN metallic transistor T1 (BC109) and PNP germanium transistor T2 (AC188) to detect heat (due to outbreak of fire, etc) in...

Night Lamps

Here are two night lamp circuits using LEDs. One could be used as a night-vision clock and the other as a TV lamp. Both the circuits are AC operated and consume...
 
 

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