No light! because of a low voltage battery. How do you increase the voltage up?
You can do many ways.
And, I recommend a simple step-up converter circuit using TDA2822.
It can increase the input voltage of 3V-12V into 4.5V-22V at a max current of 300 mA.
Imagine…
With this circuit, you connect a 6V battery to 12V lamp. Oh…It is nice.
But…Do you wonder why I use TDA2822?
Often, TDA2822 is a small stereo amplifier well.
Also, we can use it is the DC to DC voltage doubler circuit.
They are a type of switching regulator circuit. But they are special patterns. There are IC, diodes, and capacitors only. Without a coil or transformer!
So, this circuit is easy and cheap. I like them. Or you too?
How does it work
If you are not clear. See in the basic Block diagram again. The Step-up DC to DC converter is middle. It turns low voltage(input) to high voltage(output) for your load. And can increase the voltage about 2 times.
They are suitable for low voltage power supply. For example Rechargeable battery of radio communication, car battery, other small size battery, etc.
Recommended: What is switching power supply vs linear, how does it work?
A simple principle of the circuit
Here is a complete circuit of the simple DC to DC step-up converter project.
Here is a complete circuit of the simple DC to DC step-up converter project.
Look! The TDA2822 is striking with a new style.
You may like to read these posts, too.
- 1.5V to 5V boost converter circuit for micro computer
- 5V to 12V boost converter circuit or higher using transistor
- Most DC to DC Converter Step Up Voltage Circuits using LT1073
You will see that inside IC has two op-amps. So, we set it in the astable multivibrator circuit. They make a pulse generator.
To control the on-off of four switching diodes (D1-D4) to charge and discharge at C10 to output.
We will have voltage is nearly two times of input voltage. Because of the voltage of C10.
Related: 555 DC to DC converter circuits
I feel that I explained to you not good enough.
Please keep seeing block diagram below.
I feel that I explained to you not good enough.
Please keep seeing block diagram below.
C10 is similar to a water tank. And, four diodes are a one-way valve.
They will work alternately. Because of different polarity.
Also: Simple 6V to 12V boost converter circuit using BD679 transistors
Suppose that the positive voltage of pulse comes. Cause D3 and D4 are ON. But D1 and D2 are OFF. The C10 will keep this voltage.
After that, the negative gets in, now D1 and D2 are ON. But D3 and D4 are OFF. So, C10 keep this voltage, too.
How it builds
This project, I bought the Kit from the store. So, It does not have the copper PCB layout. I cannot give you. I am sorry. But I think you are good. You can solder them on universal PCB.
Below is a normal PCB. It is not clear.
The Real PCB that I am sorry it is not clear.
Read next: USB 5V to 12V DC-DC Step-Up Converter circuit
The components layout
We finish the DC to DC step-up converter
Check out these related articles, too:
- DC Voltage Doubler and Voltage Multiplier Circuits working
- DC Boost Converter circuit 3-5V to 12V-13.8V
- Simple 12V to 24V step up converter circuit using TDA2004
Components lists
You may buy or find the electronic components as follows list.
Resistor 0.25 watts
R1, R2: 22K—2 pcs.
R3, R4: 4.7Ω—2 pcs.
Ceramic or mylar polyester Capacitors
C1, C2, C3, C4: 0.022μF 50V—4 pcs.
C5: 0.047μF 50V—1 pcs.
C6, C7, C11: 0.1μF 63V—1 pcs.
Electrolytic capacitor
C8, C9: 470μF 25V—2 pcs.
C10: 1000μF 16V—1 pcs.
C11: 1000μF 50V—1 pcs.
Semiconductors
D1-D4: MBR150, Fast frequency Diode—1 pcs.
IC1: TDA2822, stereo audio amplifier 1 watts+ 1 watts—1 pcs.
Others
Terminal, Sockets 8 dip, Universal PCB, and others.
Testing and Application
We must check this circuit for error.
Then to try a power supply to input point by a voltage of 3-12 volts since it can use voltage in this range. Which at the output will be 2 times of input.
Read also: CAR DC to DC converter circuit, output +/- 27V to +/-50V using LM3524
This project applies a maximum current load of 300mA. And in while no load will pull current 6-8mA only.
The application may use any battery between a voltage of 3V-12V to an input of the project. Then the output is connected to any circuits that use voltage 4.5-22 volts and current about 300 mA.
Use 12V LED lamp by a 6V battery
Connect 12V LED Lamp to 6V battery using this project
I have a super bright LED lamp that uses 12 volts 1.5 watts only or 150mA but I have 6 volts battery only.
As Video below. We cannot use them. Then I test it with this project.
It causes the voltage output is 11.8 volts. And I connect the LED lamp to output making it glow and have voltage 10.9 volts.
Conclusion
It is easy to increase voltage. You can use this circuit for any loads that low current. You can read a book at night under a LED light. Even low voltage battery.
Click! More…Step-up DC converter with adjustable output.
Related Posts
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I always try to make Electronics Learning Easy.
I want to run three 30W LEDs or two 70W LEDs using 12V dc supply only.
So i need to have 12V DC to 36V DC step up converter.
Kindly provide the circuit design for my requirements.
Has there any connection between pin 3 and 7 through 0.022uf capacitor, just like pin 1 and 5 are connected through 0.022uf capacitor?
another question, Can I use 1N4148 instead of MBR150?
Hi, owahid
Thanks for your feedback.
No, the 0.022uf not across between pin 3 and pin 7
But c3 connected to pin 1 and 5 as Figure.
Yes you can but low current you may use 1N4001 instead.
is this is can be use as DC driver for 18w led driver
is this circuit can be use for 18 w led panel or not
Hi Ali,
Maximum power current output is 100mA-300mA.
How to make 5v with this d2822a ic ? Can it be increase?
My power bank get problem, i want a circuit that will charge the battery and the charge in the battery to charge my Mphone
i have a 24vdc/ 110/220vac 5000w rms/20000wpeak pure sine wave inverter. i wanted a 12vdc/110dc inverter, but got this one instead. I presently have six 12vdc 600cca amp marine batteries in a series /parallel formation powering the inverter. I want to parallel the six batteries at 12vdc and use a converter or a voltage doubler to make 24vdc, thereby having the output power of 12vdc batteries in parallel.
Is there a converter/voltage doubler I can use to do this and what are the kind of specs are we talking about?
Sir ,
I want convert 3 vdc(2 AAA Cell ) to 24 vdc to operate realy .
So pl provide me circuit diagram ,related components.
With Thanq
hi dear friends
i make it and connect to amplifier stk 4432 with pre.amp tone control
but it make noise on speakers
guide me plz
Can I use for power 1A output max?
It’s a lower output current than 1A. You may try: https://www.eleccircuit.com/?s=MC34063
The MC34063 can boost current more 1A with helping of a power transistor or FET.