Simple electronic circuit for beginners

Are you interested in electronics? But of course, the theory is boring. So let’s start with a simple electronic circuit for beginners or who want a circuit that can be made quickly and cheaply. First of all, we should know all the basics before getting on with the real circuits.

Simple electronic circuit

What is a simple electronic circuit?

My daughter has asked me: “What is an electronic circuit?”

It is a combination of electronic components in a specific way. Whereby we connect it with the conductor wires for the electrical current to flow through.

What is a SIMPLE electronic circuit?

It is a small circuit, uses a few components, and the working process is easy to understand. In my opinion, to keep it simple, it is the circuit that combines components under 25 pcs.

Why do we learn about the simple electronic circuit?

  • Sometimes our work is required small circuits, so there is no point in using a larger circuit. Also, the smaller the cheaper. Comparable to “Do not use a sledgehammer to crack a nut”.
  • The understanding of a Simple electronic circuit will help us learn about larger projects better. Because a large project is a lot of small electronic circuits together.

If you want to learn more about electronic circuits in depth or technically. I recommend reading more on Wikipedia.

If you are only an electronic hobbyist like me. Let’s see the circuit below. But…

Are you a beginner? Before creating various circuits, you should:

  1. Learn Electronics for beginners
  2. At least you should know the Basic Electronic Components List by Images.

Below are the circuits we have picked for you.

Learn Two LED flasher circuits

Two LED flasher circuit using NPN transistor

This calls for more Free Running Multivibrator work to resemble Flip Flop. Which encourages itself repeatedly. The Q1 and Q2 be Transistor PNP be usable general (2N3906,2N2907, etc.)

DIY Flashing Bicycle LED Taillight Circuit

Using transistors instead of ICs because they are simple and economical. It is quite simple because there are few components. But learning its working principles is very interesting.

LM386 audio amplifier circuit

LM386 audio amplifier circuit

This is my first audio amplifier circuit. I use the LM386 as the main amplifier; it is a low-voltage (4V–12V) amplifier designed specifically for audio applications. Which can be used with a small 9V or 3.7V Li-ion battery operated with as little current as 5 mA and amplification up to 500 mW. It is enough to expand the sound from a mobile phone to a 3-inch loudspeaker easily.

Non-Contact Voltage Tester circuit

Non-Contact Voltage Tester circuit

Do you want a tool to check the AC main without touching it?  This circuit can do it. In a simple way, in-circuit use transistors without IC. You can hear a sound, and show it with an LED display. Let’s create.

Small High Voltage Generator Circuit Shock!

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

Simple Condenser Mic Preamplifier Circuit

The mic brings to change the sound into electrical signals. it is a simple circuit and uses a 9V battery

5-20 Minutes Timer using 555 timer

5 Minutes Timer using 555

This timer circuit uses a 555 IC timer. It is small, compact, and portable. For the alarm by using the buzzer.  We can select the time 5, 10, 15, and 20 minutes with S3 to S7 as the order. You can read more: 5-20 minutes 555 timer with PCB layout.

LED Chaser circuits using 4017 + 555

LED Chaser circuits using 4017 + 555

There are 5 circuits with PCBs for LED Chaser circuits or Running lights. They use CD4017 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.

Gel cell battery charger circuit

Gel cell battery charger circuit

It can charge any size of the Gel cell battery and extend the life of the Gel Cell battery. While the circuit is running, the LED indicates charging

Simple AC inverter circuit

simple AC inverter circuit

When you need to use a small light bulb with a 12V battery. But no light. Why? It requires an AC line of 220 volts. How do I convert 12 VDC to 220 VAC? There are many ideas for this. But we are in a hurry. Try this circuit, the simplest inverter, with just 2 power transistors, 2 resistors, and one transformer. So easy!

TDA2822 stereo amplifier circuit

TDA2822 stereo amplifier circuit

This is my first stereo power amplifier circuit kit that can be used with a small 9-volt Battery Operated, Current use is as little as 5 milliamps, and amplification is up to 500 mW. It’s enough to amplify the sound from your cell phone to make it louder and clearer. Let’s build:

3.7V to 5V Boost/Step-up DC converter circuit using MC34063

3.7V to 5V boost converter circuit

Here is a 3.7V to 5V boost converter or step-up switching circuit using MC34063 and a few parts,1N5819,100uH. For 200mA-300mA of load current.

Automatic LED Night Light circuits

Automatic LED Night Light circuit

Try making a simple automatic LED flashlight with only 5 components. And, we would have learned about the transistor, LDR, LED, and more that work together as a voltage divider.

Simple Water Level Alarm Circuit using a Transistor

It worked by sounding an alarm when the water level rose to the set level. So we can close the water valve in time and prevent an overflow.

Simple Solar-powered Plant watering alarm circuit


It will sound an alarm whenever the soil is dry. So, we can water the plant to prevent it from dying. The solar cell works like a 6V DC power supply to save us money by not requiring batteries. It can be built easily with a few parts (without IC).

5V Low Dropout Regulator Circuit using transistor and LED

5V Low Dropout regulator-circuit using transistor LED

The 6V input voltage can make the output regulator 5V 0.5A. So, the voltage across it is 1V only.

Making a Simple 12V DC Power Supply

How to Build a Simple 12 volts power supply circuit

If you are looking for a 12V AC adapter. You can create it yourself even as a newbie. It can supply all circuits that require a 12V DC source under 2A. For example, the TDA2004 Audio Amplifier. Especially, it is built with a hammer!

30 min transistor timer circuit

30 min transistor timer circuit

We can use these simple electronic circuits. To learn the basic timer circuit. The working of the circuit is based on learning the charge and discharge of the capacitor. And we can apply it to turn on-off electrical appliances. In the application, just put a relay instead of an LED. 

Simple 1.2V AA Ni-MH Battery Solar Charger circuits

Simple 1.2V AA battery Solar charger circuit

Create it with common parts for charging 1.2V AA, So easy and cheaper

Constant current circuit using transistors

Constant current circuit using transistors

Learning experiments with a simple constant current circuits using transistors, and a few plain parts, was so helpful, especially the Ni-HM battery charger.

Toy Organ circuit using transistors

Toy organ circuit using transistors

Let’s play with a simple toy organ circuit. A daughter of mine has interested in piano. But at the moment we are unready to study it. Believe it or not, we can create a simple piano circuit by ourselves

Continuity tester circuit with Buzzer and LED

Create continuity tester circuit with buzzer and LED

This is a continuity tester circuit with a buzzer and LED. Also, I like this circuit. Because unnecessary to take my eyes off the tested circuit. We will hear the buzzer and see LED glows.

USB 5V to 12V DC-DC Step-Up Converter circuit

USB 5V to 12V DC-DC Step-Up Converter circuit

This circuit will increase the voltage from 5V to 12V load without IC. It is good to learn a switching mode regulated power supply in low power output.

UM66T Melody circuits

simple melody circuit

In the circuit basically, usability base IC UM66T uses the sound of music’s sweet-sounding origin and be usable easily. It uses just integrated one circuit and a loudspeaker, a piezo buzzer, the small-sized, and has a power supply of 3V only.

Make: LM317 Power supply (My first power supply)

LM317 power supply circuit

Sometimes you need a 1.5V power supply instead of a battery. Or other levels like 13V, 4.5V, 7.5V, etc. Use this variable-regulated power supply. Which is my first power supply. It has still worked well after 30 years.

Recommended: LM317 Voltage Regulator IC & Calculator

Fixed Voltage Regulator using 78xx

Many Fixed Regulator Circuits 5V,6V,9V,10V,12V 1A using IC-78xx series

When we need a fixed voltage regulator, the first choice is the 78xx popular three-terminal linear regulator. Because it is easy and cheap. For example, in 5V digital, we use the IC-7805, 9V (7809), 12V (7812) and etc. If you want to build this. You can see more simple electronic Circuits with PCB layouts.

See In the circuit here: 7809 converts this unregulated DC voltage to stable +9V

All electronic circuits for beginners

There are many circuits on my site you can look at the list below.

DC converter, Switching mode

Battery charger circuits

Sound Generator

Making Simple Buzzer circuit —Let’s make the electronic buzzer circuit in simple ways. But useful well worth and the price is lower than 1$. By using just a 9-volt battery only. […]


Automatic Solar Light circuit — Let’s create a simple automatic solar light circuit or a Solar Night Light Circuit. My kids made it for daily use and to learn electronic circuits. They worked well, so we are happy. […]

Simple Automatic Motion Sensor Light Circuit Is there a way we could save as much electricity as possible?


10 Key Code Lock Switch Circuit


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

Not only that. Look at more circuits below!

See! 99+ Basic Electronic circuits

18 thoughts on “Simple electronic circuit for beginners”

  1. 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’

  2. 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.

    • Hello Ganesh Shinde,

      Thanks for your visit to my site.

      I am sorry. Now, I do not have a 24V battery low voltage alarm circuit.

      But it is much interesting. I like this.

      Unfortunately, I am busy. I would like to find/test this circuit for you.

      I may use LM339 as the main.
      But I will add a 12V regulated power supply for LM339. Because It should get 12V stable voltage.

      Then, at the input, I will use the voltage divider circuit with 2 resistors and use a potentiometer to set sensitivity.

      This is just an idea. But I cannot confirm it will work well.

      Please think first to try it. Have fun.

  3. There are a few projects where you have added PCB artwork… would it be possible to get the PCB artwork in Gerber format, where we could get the board made by JLCPCB for only a couple of dollars


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