Last updated on May 24th, 2022 at 07:01 pm
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.
What is a simple electronic circuit?
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 circuit that small, use a few components, easy to understands working process.
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 is 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 the larger projects better. Because a large project is a lot of small electronic circuits together.
Below are the circuits we have picked for you.
1# Learn LDR 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.
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.
3# Make 12V 2A DC 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!
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.
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.
5# First Variable power supply
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 is adjustable over 1.2V to 37V, and with current limiting, thermal shutdown, and full protection.
This circuit is designed for you.
It can supply voltage 1.2V to 30V at all ranges is about 1A.
6# 30 Minutes Transistor Timer
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.
The application, just put relay instead of LED.
7# Make Non-Contact Voltage Tester
Do you want a tool to check AC main without touching?
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.
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
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. […]
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.
In-circuit has a few components just two small NPN transistors, 2 resistors, and a transformer. So easy to builds and inexpensive!
11# Low Watts Audio amplifier with PCB
This is my first audio amplifier circuit. I use LM386 as the main, it is a low voltage (5V-12V) amplifier designed specifically for audio applications.
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.
12# Stereo Low Voltage Power Amplifier
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.
13# LED Chaser circuits using 4017 + 555
There are 5 circuits with PCBs for 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.
Here are many interesting sites about these.
- Top 10 Simple Electronic circuits for Beginners Read more
Thank you for showing my circuit on site. - Basic Electronics: 20 steps: Read more
- 12 Simple Electronic Circuits – A collection of Simple electronic circuitsRead more
- EasyEDA – Online PCB design & circuit simulator Read more
14# Dual LED Flasher Working
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.)
15# Basic Music Sound Melody
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.
10 Latest Simple Electronic circuits for you
Continuity tester circuit with Buzzer and LED
To check solder joint defects, not kill components on PCB, as probe gives tiny current and voltage.
USB 5V to 12V DC-DC Step-Up Converter circuit
This Buck DC to DC circuit will increase the USB 5V to 12V or called the Boost converter circuit.
5V Low Dropout Regulator Circuit using transistor and LED
The 6V input voltage can make the output regulator 5V 0.5A. So, the voltage across it is 1V only.
Simple 1.2V AA Ni-MH Battery Solar Charger circuits
Create it with common parts for charging 1.2V AA, So easy and cheaper
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
Constant current circuit using transistors
Learning experiments with simple constant current circuit using transistors, and a few plain parts, was so helpful, especially the Ni-HM battery charger.
Gel cell battery charger circuit
It can charge any size of the Gel cell batteries and extend the life of the Gel Cell battery. While the circuit is running, the LED indicates charging.
3.7V to 5V Boost/Step-up DC converter circuit using MC34063
Here is 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.
Conclusion
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
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I always try to make Electronics Learning Easy.
Can I get PCB for some of the project such as Video Amplifier,O-30 volt power supply
I regret not being able to service the PCB for you.
But I would like to recommend a good service for you.
https://jlcpcb.com/
First, you may design them with https://easyeda.com/. It is great and free.
Then, use service at jlcpcb.com. It is a good idea.
The simple projects of electronics students. we providing embedded system training in trichy for all steaming students.
Good site for coding. If I have free I will learn too.
can you design a circuit that can produce square wave ,saw tooth and sin wave and show me where the terminals of an oscilloscope and power supply are connect please
ecually i want a design of an oscilloscope
Hi Mziwenkosi,
Please see the function generator: https://www.eleccircuit.com/xr2206-function-generator/
Your idea is very interesting. If your project is successful. Do not forget to share with me, thank you.
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’
Tl082 surround circuit
Hello Saravanan,
Do you want a surrounding circuit?
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.
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.
Thanks
I want to make 24V battery low voltage alarm 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. https://www.eleccircuit.com/lm339-quad-comparator-ic-datasheet/
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.