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Solar Light For A Portable Toilet

Despite being more expensive than standard permanent outdoor toilets, portable toilets (Fig. 1) have several significant benefits as these are self-contained and can be...

Make A Crystal-Locked FM Transmitter

The circuit presented here uses a crystal oscillator and frequency multiplier to generate a highly-stable carrier signal frequency of 96MHz. With 40mW of RF...

Battery Charger and Discharger Using USB Power Supply

Gadgets like electronic toys and musical players commonly use 1.2V rechargeable batteries in capacities ranging from 200mAh to 2800mAh, which need to be charged...

Automatic Water Tap Without Using Microcontroller

Water scarcity is one of the biggest issues plaguing the world today. To prevent this from becoming any worse, we need to focus on...

Illuminated Optical Magnifier

We often face problem while reading the values of ICs and miniature SMD components, detecting cracks or shorts in tracks in a PCB, or...

Electronics Projects: Low-Cost Dusk-Dawn Controller

Solar streetlights can be easily integrated with a dusk-dawn controller by simply employing a pnp transistor and a few resistors where the solar panel...

Multi-Sensor Data Plotting using Arduino IDE

Monitoring of various process variables such as temperature, pressure, viscosity, humidity, pH and flow-rate is very important in steel plants, petrochemical and other such...

Make Your Own Dual-Voltage Rechargeable Torch Light

The purpose of this circuit is to create a new topology with good power factor maintained at AC voltage input, to provide good efficiency...

Software-Defined Radio with Android Smartphones

Software-defined radio (SDR) is one of the most important wireless communication technologies. It is a unique type of radio system that can tune to...

Make Your Own FM Transmitter For Broadcasting

This FM transmitter design is one of the simplest you can build. No tuning is required, as the transmit frequency is crystal-locked at 90MHz....

Convert 12V DC To 9V DC Using IC LM2576

You may already have on hand a 12V AC/DC adaptor or 12V from your PC or 12V battery, but you need a 9V, 2.5A...

Automatic Water Refiller for Air-Coolers

Air-coolers provide cool air in a room by adding moisture to the air. This moist air is blown inside the room by an exhaust...

Build This Electronic Toy For A Child

Presented here is an electronic toy circuit for your child’s entertainment. The concept of a joint family is disappearing, and childcare is also becoming...

Make Your Own 15W Audio Amplifier

Here is a simple audio amplifier circuit based on TDA2050 IC. This amplifier can deliver an output power of around 15W for an 8-ohm...

Automatic Power-Resumption Alarm

Most power-resumption alarm devices produce non-stop alarm when power resumes. To overcome this problem, here is an automatic Power-Resumption alarm circuit that sounds an alarm...

Make This Solid-State Relay Driver for Microcontroller

Here is a simple solid-state relay (SSR) driver circuit using a transistor. An SSR is similar in operation to a traditional electromagnetic relay with...

Mini Fridge With Peltier Modules

It was in the middle of 1821 when J.T. Seebeck discovered that if two dissimilar metals connected at two different points are held at...

Smart Digital Calendar That Tells You Live News From EFY

We all must have used a photo frame in our houses, but have you ever wondered that you can make a smart digital photo...
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