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.
Try a simple automatic LED flashlight. With 5 parts only.
Learn about the transistor, LDR, LED, and more work together as a voltage divider.
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.
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.
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. […]
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!
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.
There are 5 circuits with PCBs for LED Chaser circuits or Running lights.
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
To check solder joint defects, not kill components on PCB, as probe gives tiny current and voltage.
This Buck DC to DC circuit will increase the USB 5V to 12V or called the Boost converter circuit.
The 6V input voltage can make the output regulator 5V 0.5A. So, the voltage across it is 1V only.
Create it with common parts for charging 1.2V AA, So easy and cheaper
The mic brings to change the sound into electrical signals. it is a simple circuit and uses a 9V battery
Learning experiments with simple constant current circuit using transistors, and a few plain parts, was so helpful, especially the Ni-HM battery charger.
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.
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.
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!
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