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Showing posts from 2015

tda 7052B full wiring diagram, easy to understand

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I accidentally bought IC TDA 7052b from local electronic store (it should be TDA 7052) . I have been finding circuit diagram in google but seem the circuits not working so I decided to test it in my own way. Finally, I found the best wiring diagram that works, so I think I must share it to help DIY lover like me. TDA 7052B is bridge-tie load amplifier ic, so no need output capacitor coupling (Better bass respond and bass quality) 1.2 w@ 8 ohms load amplifier ic. The chip sound better compare to class d amplifier(pam8403) but less output power. The image below shows how to wiring proper volume control for TDA 7052B In real life, the IC can connect to 4 ohms loudspeaker without any problem.
List of component:1 TDA7052 B 2 100 uf 16 volts electrolytic capacitor(C2) 3 10 uf 16 volts electrolytic capacitor (C3) 4 0.1 uf mks capacitor(C1) potentiometer(volume control) 6 8 ohms 2 watts speaker( I use 4 ohms without problem). 7 DC source 3-18 volts (5 -9 volts recommend)

Need more power? 2.5 watts ampl…

Hack desktop lamp to USB loudspeaker.

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This project started when I want to save space in my desk but don't want to listen music direct from laptop/desktop directly because it's not loud enough and sound poor and don't want to spend much money for news loudspeaker. See video tutorial step by step.

List of component:

1 desktop lamp. 2 tda 7052B ic ( you can use pam8403/8406 sound amplifier module too). 3 Volume control. 4 capacitor 0.1 uf x2 and 1000 uf 16 volts electrolytic capacitor 5 10 uf 16 volts for input coupling(Don't believe junk website circuit that cut input coupling capacitor out if you use tda7052B ic, you will make your amp ic overheat and damaged.).
6 old male usb and audio jack(headphones jack is ok) 7 usb adapter or power bank. 8 wires and soldering iron.






















Happy your hobby world.

How to repair lcd display problem without paying any money.

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My multimeter LCD had the annoying big black spot on it. That made me hard to read numbers, so I decided to fix it without paying money because the multimeter cost not high.

This method is not cost you at all because the material I used was in my bin.

All you need:
Time
a piece of paper

See before and after picture below.



Why old LCD display always have black spots?

Because when LCD display exposes to sunlight, the moisture is slowly degrading glue that attaches to mirror foil. If you do not keep the multimeter away from moisture or the sunlight the multimeter's LCD display will be worst until you cannot see anything.

Below is the video that shows you how to repair the problem completely.

DIY Super bright light reading lamp usb power.

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Hello everyone today I'm going to show you how to make super bright light usb power      reading lamp from low cost 12 volts led made in china light bulb. Now you can use your  power bank to supply super bright reading lamp even if power outage. The bulb compatible  with computer usb supply too.

Let's get start!!!

List of component:
  Low cost made in china 12 volts led bulb  IC regulator 7833







 First open led bulb case
Then find led cathode that print circuit is connect to negative pole directly as show in dark bule  line in picture below and connect  positive wire(pale blue) to led anode. 

Solder wire to IC 7833 and bulb as picture below. White wire negative,pale bule positive.

Now assemble everything in the bulb and see full demonstration in my video below.


Have a good diy time. Bye bye.

How to fix mouse wheel scrolling problem.

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My 3 years old mouse had scrolling problem now it's time to fixed it. The mouse wheel is the part that usually has a problem but you can fix it without spending any money and your mouse will be good again.If you love DIY or hobby you can make your mouse wheel smooth by remove mouse case and clean mouse wheel and clean led pointer from hair,dust when you use it six months more.

All you need to fix it.
1 screwdriver
2 plier

That's it.

Below is the video that shows the method.


A mouse scroll wheel uses a rotary encoder to read movement and convert it to data that process and send to a computer. When you scrolling a mouse wheel for a long time the electronic component slowly wearing out and has a little gap when the gap large enough your mouse wheel will start jumping and you need to change your mouse to a new one. 

However, you can fix it without paying any money as show on above video and the method works for every mouse model if the rotary encoder not so much wearing out.
I am feeling…

Low volts simple circuit water detector.

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Hello everybody, today I'm going to show you how to make simple circuit water detector. The circuit is very easy to build and use minimal component and works very well.

How the circuit works.
This circuit use transistor to amplifies small current that pass through water to enough current to drive led light without using complex ic.

List of component.
The circuit is very simple and easy to build.
2 transistor bd 139
2 resistor 10kohms, 100 ohms
1 led
2.4 to 6 volts batteries(usb power compatible).
conductive tape.

The video below show test circuit and how it's working and circuit diagram




Water detector schematic diagram.




Water detector wiring diagram.


usb power automatic night light.

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Hello, today I'm going to show you how to build easy usb power automatic night light with easy to understand wiring diagram in this video.
The circuit consume just .24 mah per hour and can add up to 5 or more leds (five leds are recommend or just change some resistor value and attach heatsink to output transistor).
As you can see in this video that I used 4  rechargeable battery and got 4.8 volts, so you can use usb charger as power source too.

List of component
2 BD 139 transistors or equivalent transistor
1 100 ohms resistor
1 1000 ohm resistor
1 20,000 ohm resistor
1 photo resistor
1-5 LEDs (the more led the more power consume if you use batteries power souce)

wiring diagram:



Test circuit video.

Hope you like it.