Intermediate Projects

Presented here is a simple circuit that uses six red, green and blue (RGB) LEDs to generate a running-light effect in seven colours—blue, green, red, cyan, yellow, magenta and white. The...

In older carbureted cars, the contact breaker (CB) point ignition system is used to fire the spark plugs. You can convert the ignition system of your car from CB-point-cum-condenser type into...

This article describes a low-cost low noise audio distribution amplifier based on hybrid or mixed technology. Input to the amplifier is from low-noise, high-gain npn transistor. Output buffers are implemented with voltage...

As you may already know, using a USB OTG (on-the-go) adaptor, you can connect pen drives, game controllers, etc to your Android device. This adaptor can also be used to power...

Here is a circuit through which the speed of a fan can be linearly controlled automatically, depending on the room temperature. This temperature controlled fan circuit is highly efficient as it...

Use of brushless DC motors (BLDCs) is on the rise. But their control usually requires rotor position information for selecting the appropriate commutation angle. Normally, a Hall Effect sensor is used...

This ball speed checker circuit measures the speed of a cricket ball based on the time taken by the ball to travel the distance from the bowling crease to the batting...

This circuit can be used to control up to four electrical devices through a cellphone or computer. The main advantage is that you can login from anywhere to control the device(s)....

This article describes a simple, low-cost DC to DC converter for a microcontroller (MCU) kit. This converter is built around popular NE555 timer. It can provide positive and negative output voltages...

Here is an Arduino based social distancing alarm cap meant for Covid-19 pandemic or similar disease outbreak. Maintaining the right gap for social or physical distancing is not always feasible. When...