We understand that simple electronic circuits are very important. My friend said the large electronics project come of combining many small electronic circuits.
I also think that this passage is true. The some of your work may lack the small things. The small circuits will help it to work well.
Electronics are something near us. For example, cell phones, computers, televisions, etc.
Everything needs electricity as energy by plugging in a house or charging with AC adapter.
Inside these appliances consist of devices called those electronic components. They are connected in a manner known as the electronic circuit. Which using these appliances, we do not need to learn the workings of the electronic circuit inside it.
But learning electronic circuit is a very good skill or ability. The working principle of electronics may be tedious and useless.
Because of all the knowledge. It may be useless. If it is not used. We like the foods stored in the refrigerator. But it will not make full your stomach.
We have to bring it to cook or eat it.
If you have a passion for electronics works. We should learn electronics by using electronic circuits to create the fun projects. To solve everyday problems, is good, make your free time is useful.
Also, if you have technical skills. You can save money. Because when the appliance is broken. You can repair first.
List of simple electronic Circuits
- 1 1A Fixed Regulator using 78xx
- 2 Variable power supply using LM317
- 3 30 Minutes Transistor Timer
- 4 5-30 minutes timer circuit using IC 555
- 5 Simplest Inverter circuit using transistors
- 6 Small high volts shock using 2SC1815 transistor
- 7 Low watts Audio amplifier circuit with PCB
- 8 Low watts Stereo amplifier circuit
- 9 LED Chaser circuits using IC 4017 + IC 555
- 10 Dual LED Flasher using 2N2907
- 11 Simple music sound using UM66T
1A Fixed 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 it.
The first choice we recommend using LM7809 from family IC-78xx as popular three-terminal linear regulators. In the circuit above.
The ACV 12V to 18V from a transformer is fed to D1-D4. To 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 IC-7812 = 12V DC output.
If you want to build this. You can see more simple electronic Circuits with PCB layout.
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.
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 and 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.
30 Minutes Transistor Timer
And we can apply it to turn on-off electrical appliances. The application, just put relay instead of LED. Continue Reading
5-30 minutes timer circuit using IC 555
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.
Simplest Inverter circuit using transistors
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 store.
Continue Reading >>
Small high volts shock using 2SC1815 transistor
In circuit has a few components just two small NPN transistors, 2 resistors, and a transformer. So easy to builds and inexpensive!
Low watts Audio amplifier circuit with PCB
Which can be used with a small 9 volts Battery operated. The 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-inchs loudspeaker easily.
Low watts Stereo amplifier circuit
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. Continue Reading>>
LED Chaser circuits using IC 4017 + IC 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 oscillator pulse generator. It is best for a beginner or for kids to learn digital also my son loves them. Continue Reading>>
Dual LED Flasher using 2N2907
This circuit 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.)
Simple music sound 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. Continue Reading>>
Learn more : Simple Electronic circuits
Quote and Order boards in minutes on https://jlcpcb.com/quote