Old Projects Migrated From elonics.in

Below are all the old articles previously showcased in another website.

Light Sensor and Darkness detector circuit using LDR and Transistor

A tutorial on How to make a Light Sensor / Darkness detector circuit on breadboard using LDR and a transistor. This circuit can be used to automatically control and turn on-off lights or any loads depending on the brightness of ambient light, by adding a relay at the output.

IR (InfraRed) proximity sensor / Obstacle detector circuit using LM358 opamp

A tutorial on How to make an InfraRed (IR) proximity sensor circuit along with detailed explanation on how the circuit works. The sensitivity or Range of detection can also be controlled by adjusting the potentiometer.

LED chaser circuit / Sequential LED flasher using 4017 IC and 555 timer

A tutorial on how to make an LED chaser lights (or) sequential LED flasher circuit on a breadboard using 555 timer + 4017 IC and a few other components. The LED’s chasing rate can be adjusted using a potentiometer in place of 47K resistor.

Simple Flashing LED Circuit using transistors

This project is on how to make a simple flashing/blinking LED circuit using transistors on a breadboard. watch the video for detailed step by step instructions on how to build this circuit. Changing the flashing rate is also possible by changing the value of capacitor used, which is shown later in the video.

Touch on Touch off switch using 555 timer IC

In this project we will make a Touch on Touch off switch circuit using 555 timer IC on a breadboard. This circuit has two pairs of touch conductors. Touching one of the conductor pairs turns on the LED and touching the other pair turns the LED off.

Dual LED Flasher Circuit using 555 Timer

This project is to flash/blink two LED’s alternatively at an interval of around 500ms. The circuit uses 555 timer IC along with a few other electronic components and is built on a breadboard. In this circuit, 555 timer IC is used in astable mode which makes the output to continuously fluctuate between high and low until you turn the power off.

InfraRed(IR) Remote Tester / IR receiver Circuit using TSOP1738

A simple InfraRed(IR) receiver circuit using TSOP1738 IC. Also known as remote tester, this circuit can turn on LED whenever any button on the remote control is pressed. The heart of this circuit is TSOP1738 which demodulates the signals received from the remote control and gives output in the form of active low.

Simple Touch Switch using transistors

This circuit turns on LED with the touch of your finger!. Many a times we need certain actions to be done with a touch instead of pressing a button. This simple circuit does that using minimal components.

Flashing/Blinking LED Circuit using 555 timer

A tutorial on how to make a flashing/blinking LED circuit on a breadboard. This circuit flashes LED at an interval of around 500ms using 555 timer IC and a few other electronics components. This is a beginner project and is intended to make you understand the basic principles and working of the 555 timer IC.