Beginner Electronics Projects

5V Voltage Regulator

Build a stable 5V DC power supply using the LM340 voltage regulator. Ideal for microcontroller circuits and small electronics projects.

12V to 5V Converter

Learn how a 5V voltage regulator circuit works, circuit diagram, applications, and how to regulate 12V or higher voltage down to stable 5V DC for electronics.

3.7V to 1.5V Converter

Learn how to convert 3.7V to 1.5V using a buck converter or voltage regulator. Ideal for low-voltage electronics like sensors, microcontrollers, or low-power LEDs.

Full Wave Bridge Rectifier Project

Learn how a full-wave bridge rectifier works using 4 diodes and a transformer. Explore working principles, circuit diagrams, and practical applications.

3.7v battery level indicator circuit

A simple 3.7V battery level indicator circuit using LEDs to monitor charge status for lithium-ion batteries. Ideal for DIY electronics and portable devices.

12V Charging Indicator circuit

Design a simple 12V charging indicator circuit using LEDs and transistors to visually show battery charging and full status for automotive or solar battery systems.

5V to 1.5V Converter Circuit

Learn how to convert 5V DC to 1.5V using a simple step-down (buck) converter. Perfect for low-power electronics like sensors, LEDs, and microcontroller peripherals.

12 Volt Battery Level Indicator

Simple 12V battery level indicator using LEDs or op-amps to show charge status. Ideal for DIY battery monitoring and renewable energy applications.

12V Charging Indicator Circuit

Easily monitor your 12V battery charging status with this LED-based indicator circuit. A simple and efficient solution for battery health monitoring.

12V Negative Voltage Regulator

Learn how a 12V negative voltage regulator works. Circuit, applications, pinout, and FAQ included. Ideal for power supply stabilization in electronics projects.

5 pin relay wiring diagram

Learn the 5-pin relay wiring diagram with terminals 85, 86, 30, 87, and 87a. Step-by-step connection guide for automotive, lighting, and motor control systems.

auto cut-off 12v Battery Charger

Learn a 12V auto cut-off battery charger circuit that charges safely and stops at full voltage. Includes schematic, parts, installation, and testing steps.

12v Battery Charger

Learn a 12V battery charger circuit for lead-acid or SLA batteries. Includes schematic, step-by-step wiring, safety features, and voltage/current regulation.

12v Dc motor speed control circuit

Build a 12V DC fan speed controller using BC557 PWM circuit. Adjust fan speed smoothly with the MOSFET driver. Simple, low-cost, and efficient design.

24v Voltage Regulator

Learn how to build a 24V voltage regulator using the KIA7824A IC. Provides a stable 24V DC output for electronic devices, circuits, and industrial projects.

18650ma Battery charger Voltage Protector Circuit

Build a 18650 battery charger with voltage protection using TL431. Ensures safe charging, prevents overcharge, and extends battery life.

Battery Charger

Build a simple 12V battery charger using a TIP120 transistor. Safely charges lead-acid batteries with automatic current regulation for protection.

12v Battery Level Indicator

Build a simple battery level indicator circuit to monitor battery charge. Displays voltage levels using LEDs for 12V batteries in a cost-effective way.

Battery Low voltage cut off Circuit

Protect your 12V battery with LM431 & TIP42C low voltage cut-off circuit. Automatically disconnects the load when the battery drops below safe voltage.

BC547 Touch Switch Circuit

Build a simple BC547 touch switch circuit. Turn on/off lamps or small devices by touch with a low-cost transistor-based electronic switch.

BC557 Transistor Project

Explore BC557 transistor projects for DIY electronics. Build amplifiers, switches, or LED control circuits using this PNP transistor in simple setups.

Component Tester

Build a simple component tester circuit to check transistors, diodes, resistors, and capacitors. Ideal for hobbyists and electronics beginners.

12v DC Fan Speed Controller

Control DC motor speed using TIP41 transistor. Simple PWM-based circuit allows smooth speed adjustment for small DC motors in robotics and DIY projects.

Delay LED Light Circuit

Control the LED light with an adjustable delay using a BC547 transistor. Simple RC-based timing circuit for smooth LED ON/OFF transitions in DIY projects.

Emergency Light auto Cut

Automatically cut off charging and power for the emergency light using the D882 transistor. Simple and reliable circuit for battery protection and LED safety.

Fire Alarm System Project

Design a simple fire alarm system using BC547 transistor. Detect smoke or heat and trigger buzzer or LED for early fire warning in DIY projects.