Electronic Circuits

In this section you will learn and build simple electronic circuits projects. You will make interesting analog electronic circuits useful in daily life. Moreover, you will know electronic circuit design using circuit elements.

The circuits include home made electronic circuits, hobbyist circuits and prototypes.

Articles Written 248

Simple Flood Alarm

The electronic flood alarm circuit presented here is wired around an LMC555N (IC1) – CMOS version of the bipolar 555 timer chip. IC1 is followed by a complimentary pair of emitter followers (T1 and T2) […]

Unique Electric Heater Controller

Circuit of a little solid-state heater controller is described here. This circuit can be used to regulate standard resistive heating coils widely used in AC230V grid supply powered heating gadgets like Air Heaters, Hot Air […]

White LED Bulb AC230V

Presented here is a simple yet useful AC230V White LED light bulb with an isolated digital interface to control its on/off switching actions through a microcontroller or an external electronic circuitry. The design is based […]

Automatic LED Night Light

Inspired by a Chinese design, recently I built a small automatic LED night light with the help of a few generally available inexpensive components. Shown below is the base schematic of that automatic White LED […]

Microwave Radar Motion Sensor Switch

Presented here is an automatic motion sensor switch built around a cheap ‘Doppler Microwave Radar Sensor’ that can be easily used as standalone detection sensor. The circuit, designed as an alternative to the common PIR […]

3V3 uC Power Supply

Nowadays most electronics hobbyists require a precision 3.3V power supply module for their microcontroller (uC) and/or internet of things (IoT) projects. The traditional linear power supply is not a good choice in many situations because […]

Poorman’s Laser Diode Driver

Recently I got a couple of powerful laser diodes from a friend abroad. The ‘invisible’ (infrared) laser diodes with 1000mW and 2000mW power (808nm wavelength) are good for numerous applications like solid-state laser excitation, infrared […]

Universal Relay Module

Here is the circuit of a do it yourself universal relay module for microcontroller projects. One advantage of this design is that it can work with both active-high and active-low TTL signals from the I/O […]