15 Simple electronic circuit for beginners

Are you interested in electronics? Of course, the theory is boring.

Let’s start with better simple electronic circuits.

For a beginner or who wants a circuit that quick to make and inexpensive.

Also, It is great learning! Why?

Because understanding simple electronic circuits a nice basic.

Simple electronics circuits

My friend said.
“A large electronics project includes a lot of small electronic circuits together”

Do you think really?

I also think it is true. Some of your work may want the tiny parts. So, small circuits will help it to work well.

So what,

I used to build a lot of small circuits. Of course, it takes a long time. Our time is precious.

I want to help you choose this circuit that is easy. And build quickly in time.

There are a total of 15 circuits below.

1# Lego Automatic LED Flashlight

automatic LED flashlight

Try a simple automatic LED flashlight. With 5 parts only.

Learn about the transistor, LDR, LED and more work together as a voltage divider.

Read More about This circuit

2# Simple Solar Plant watering Alarm


It will sound alarms when the soil is dry. So, the trees do not die. 

The solar cell is a 6V DC power supply. So, saving convenience and does not require batteries.

The circuit without using PCB. You can build easily with a few parts.

Read More about This circuit

3# Make 12V 2A DC power supply

12V 2A AC adapter power supply

If you are looking for a 12V AC adapter, easy project.

You may love this circuit.

It can supply all circuits that require a 12V DC source under 2A.

For example CAR audio system: TDA2004 Amplifier.

Anyway, let’s get back to look at this circuit.

It is a special building with a hammer!

Read More about This circuit

4# Fixed Voltage Regulator using 78xx

Usually, the main power supply of an electronic circuit is the battery.

Because it is small, energy is clean and safe.

Fixed Regulator 5V,6V,9V,10V,12V 1A By IC 7805,7806,7809,7812

For example, most circuits use a 9V battery. When its power is gone.

We need to buy a new replacement. It’s not convenient at all.

Thus, I make 9V power supply instead of it.

The first choice, we recommend using LM7809.

It is one of family IC-78xx as popular three-terminal linear regulators.

See In the circuit above.

The ACV 12V to 18V from a transformer is fed to D1-D4. They rectifier AC to DC. 

Then, C1 filters to smooth DC. 

Next,  the 7809 converts this unregulated DC voltage to stable +9V.

In addition, if you need other voltage levels.

For example, 5V digital, we use the IC-7805 instead of IC-7809.

So, use IC-7812 for 12V DC output.

If you want to build this.

You can see more simple electronic Circuits with PCB layout.

Read More about This circuit

5# First Variable power supply

Circuit Diagram of My First Variable DC Power Supply 1.25V to 30V at 1A using LM317
1.5A, 1.2V to 30V Variable power supply using LM317

Sometimes you need to use 1.5V power supply circuit.

But you cannot use IC-7805. Or.

You need to use other voltage e.g. 13V or 4.5V.

Recommended: LM317 voltage Regulator IC Calculator

In the best way, you should use a variable Regulated power supply. 

For beginner and easiest, we use LM317 (3 terminal positive adjustable regulators).

The LM317 is an adjustable regulator IC that designed to many supplies for 1.5A output.

Related: LM317 2N3055 Variable power supply

Also, it adjustable over 1.2V to 37V, and with current limiting, thermal shutdown, full protection.

This circuit is designed for you.

It can supply voltage 1.2V to 30V at all range is about 1A. 

Read More about This circuit

6# 30 Minutes Transistor Timer

We can use this simple electronic circuits. To learn the basic timer circuit.

The working of the circuit is based on learning of the charge and discharge the capacitor.

30 minutes Timer using transistors

And we can apply it to turn on-off electrical appliances.

The application, just put relay instead of LED. 

Read More about This circuit

7# Make Non-Contact Voltage Tester

Do you want a tool to check AC main without touching? 

This circuit can do it.

Simple Non-Contact AC Mains Voltage Detector

In a simple way, in-circuit use transistors without IC.

You can hear a sound, and show it with an LED display.

Read More about This circuit

8# 5-30 Minutes Timer using IC 555

This timer circuit uses a 555 IC timer. This is small, compact, and portable.

For the alarm by using the buzzer. We can select the time 5, 10, 15, and 30 minutes with S3 to S7 as the order.

It makes clear the brain is ready to continue to work.

Many friends like this. You may also like it.

You can read more: this 5-30 minutes timer with PCB layout.

9# Simplest Inverter using transistors

Simple Transistor Inverter Circuit Diagram

When you need to use a small light bulb with a 12V battery.  But no light. Why? This light bulb requires high voltage,220VAC. How to convert 12VDC to 220VAC 50Hz?

You may have many ideas for this. But if you are in a hurry, here is another easy idea. It names the simplest inverter.

It just uses two power transistors, two resistors, and one transformer only. So easy! You may have them in the store.  […]

Read More about this circuit

10# Small High Volts Generator Shock!

If you want to make a funny circuit for people. This circuit may make laughter.  It is a small high volts shock circuit. The output is low current. It is not harmful to people.

high volt shock using transistor-2SC1815

In-circuit has a few components just two small NPN transistors, 2 resistors, and a transformer. So easy to builds and inexpensive!

Read More about This circuit

11# Low Watts Audio amplifier with PCB

This is my first audio amplifier circuit. I use LM386 as main, it is a low voltage (5V-12V) amplifier designed specifically for audio applications.

LM386 Datasheet Low voltage audio power amplifier

Which can be used with a small 9 volts Battery operated. Current use as little as 5mA. And amplification up to 500 mW.

The gain is internally set to 20. The gain can be increased to 200 by connecting a 10-uF capacitor across pins 1(+) and 8(-). Enough to expand the sound from a mobile phone to 3-inches loudspeaker easily. 

Read More about This circuit

12# Stereo Low Voltage Power Amplifier

TDA2822 stereo amplifier datasheet

This is my first stereo power amplifier circuit kits that can be used with a small 9 volt Battery Operated, Current use as little as 5 milliamps. And amplification up to 500 mW.

Read More about This circuit

13# LED Chaser circuits using 4017 + 555

led-chaser circuit using IC-4017-555

There are 5 circuits with PCBs about LED Chaser circuits or Running lights.

They use IC-4017 to drive LEDs and IC-555 as an oscillator pulse generator. It is best for a beginner or for kids to learn digital also my son loves them. 

Read More about This circuit

Here are many interesting sites about these.

Top 10 Simple Electronic Circuits for Beginners Thank you for showing my circuit on your sites
Basic Electronics: 20 Steps
12 Simple Electronic Circuits – A collection of Simple electronic circuits
EasyEDA – Online PCB design & circuit simulator

14# Dual LED Flasher Working

Learn 2 LED Flasher circuits using transistor

This  calls more Free Running Multivibrator work to resemble Flip Flop. Which encourage itself repeatedly.

The Q1 and Q2 be Transistor PNP be usable general (2N3906,2N2907, etc.)

Read More about This circuit

15# Basic Music Sound Melody

How to make simple melody using UM66T

In the circuit basically usability base IC UM66T use the sound of music sweet-sounding origin and be usable easily.

It uses just integrated one circuit and a loudspeaker, piezo buzzer, the small-sized, and have power supply 3V only.

Read More about This circuit


These are just a few easy circuits diagram. If you want to look more circuits click here!

Not only that. Look more circuits below!

See! 99+ Simple Electronic circuits

Related Posts

Do you have it yet? Buy Electronics Components


I always try to make Electronics Learning Easy.


  1. M.S.Swamy

    Can I get PCB for some of the project such as Video Amplifier,O-30 volt power supply

  2. Michael Cote

    How do I go about starting a design for an inverter that outputs 15kv ac?starting with the first segment of the design, what questions do I ask myself?  How do I decide what values to give the components of each part of the design?  Sort of a DC to DC to AC Coninvertor so to speak.  Or am I just whishfull thinking?  Either way how do I start giving values to the components to make a DC to DC Converter Work for a Set Voltage in mind, say 300kv?  How do I set the first voltage divider and establish a working Vs?

    Thank you,
    Michael Cote’

  3. raj

    hello, sir nice and valuable information in your article. the diagram is very easy and easy to read and make.
    sir, I want to know that in one of your diagrams like Learn 30 Minutes Transistor Timer you mention The Transistor value BC 549, I think this is an on/off switch transistor.
    sir can use BC 547,548 for this circuit.
    In Motor Winding

    • Hello raj,
      Thanks for your feedback.
      Yes, you can use BC547, BC548, and BC549 or BC550. They are small NPN transistors.

  4. Witek

    What kind of software do you use to generate those funky colorful schematics?

    • Hello Witek,
      Thanks for your visit. I like your question.
      Now I use the Inkscape software on Ubuntu OS.

      Before, I used Illustrator on MAC and Corel draw on Windows OS.

      Have a great day.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.