Stereo left right sound test

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If you reverse left speaker and right speaker position, you will see picture move right but sound move to left, that seem annoying. Now it's time to correct a mistake!!!


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How to connect volume control to an amplifier

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I saw a comment on my Youtube video, he asked me how to connect any amplifier module to a volume control or potentiometer. I think so many people who want to start an electronic project must know this basic wiring too, I hope this wiring diagram will help an electronic DIYer like me.First thing you need to know:use shield wire for an input signal to volume control and from volume control to amplifier if you don't want you amplifier suffers from parasitic oscillation (sound like JeeeeJeeeee).keep a wiring as short as possible.use low resistive value volume control (5-10 kilo-ohms) if the amplifier has random parasitic noise when you turn a volume control up or down.volume control is a potentiometer.Volume control principle is a signal divider, the more volume control output(yellow line) near input signal source(pink line) the most signal flow to an amplifier. When you lower a volume control the resistive value between a volume control output and an input signal are increase and cau…
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5 watts amplifier TDA7056A wiring diagram

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TDA 7056 A is an audio power amplifier IC that has 5 watts output power with 8 ohms speaker and 3 watts with 16 ohms speaker.The IC is simple to wiring and needs only 6 external components to make the amplifier working. TDA 7056A working with a power supply between 4.5 - 18 volts so the IC can use a battery as power supply. if you use more than 9 volts, you need to attach small heat sink to the IC.TDA7056A has a built-in DC volume control so you can control the gain of the amplifier by changing voltage value at DC volume control pin by use a potentiometer. DC volume control makes you connect the audio signal directly to the amplifier input so it makes a sound more transparent and cleaner than a normal amplifier. 
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I saw a new comment on my video, he asked me how to add a filter capacitor to amplifier board D.C. power supply. I think it's a good question so I will explain it here.
What is a power supply filter capacitor?

It is the capacitor that used to filter AC ripple from DC power supply present to amplifier board. If an amplifier has low capacitive power supply capacitor, it may present a little hum(50/60 Hz low-frequency sound) that you can hear in a quiet room.

The capacitor also stores power and bring it instantly to your amplifier when an amplifier needs more power for a short period of time such as  explosion sound in a movie.

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Below pictures are the place that you add power supply capacitor.



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Hall effect sensor switch is a switch that turns on when enough magnetic field near the IC. You can use hall effect sensor to make many Diy projects such as rpm meter, magnet detector, and more project involves with a magnet.
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how to make an automatic faucet

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Now you will not forget to close your faucet or waste water when you pick a soap to wash your hand or face. This project shows you how to make an automatic faucet, you can even use the faucet that water valve damage because of this circuit use solenoid valve to control water.Electronic components you need:
1 Arduino Uno R3
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R1 = 10 kilo-ohms
R2 = 100 ohms
R3 = 4.7 kilo-ohms
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12 volts 1 Ampere adapter


The Arduino code is very simple and you don't need to load any special module to make this project works


 created 29 Dec. 2008
 modified 9 Apr 2012
 modified 20 Oct 2017
by easyandworkproject.xyz
 by Tom Igoe

 This example code is in the public domain.

 */

// These constants won't change.  They're used to give names
// to the pins used:
const int analogInPin = A0;  // Analog input pin that the ir sensor is attached to
const int analogOutPin = 9; // Analog output pin that the LED is attached to

int senso…
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PAM 8403 board amp wiring diagram

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PAM 8403 is a portable 3 watts stereo class d amplifier that uses only 5 volts D.C. to operate. The amplifier board is easy to wiring and very small size, you can make a small amplifier project that not requires high voltages to work.The first thing you need to know. PAM 8403 cannot bridge together because the amplifier is already bridge-tie-load output configurationOver 6 volts can damage the amplifier module, if you want higher power you can check 10 watts class d amp PAM 8610 hereYou must use shield wire connect from input source to volume control and from volume control to the amplifier board input if you don't want your amplifier to suffer from parasitic oscillation (sound like JeeeeJeeee) Today I will show you how to wire PAM 8403 board amp that easy to understand. Let's see image below.
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This bass boost diagram is easy to build and work well, I made it because people asked me the schematic diagram of bass boost diagram on my youtube channel.

The circuit has 9 dB gain@40 Hz that mean you will get good bass performance even you play music to a small speaker. Why this circuit doesn't look like circuits on the internet?
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how to make condenser microphone pre-amplifier

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I saw a comment on my youtube video that he want to connect condenser microphone directly to pam8610 amplifier board. However, if he needs to connect condenser microphone to any amplifier board he must bias and amplify the signal before. Now let's start!!! Condenser microphone need a power supply to bias circuit inside that why we need specific preamplifier for it. You need two electronic component to make condenser microphone to operate 
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Above picture shows how to bias opamp for single power supply (V+ and Ground)
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