Introduction

This website builds to collect my little DIY projects, fixing and repairing and share them with people who interest DIY like me.

My DIY projects on this website are simple and can use in real life. This website may be not good for someone who wants complex and complicated circuit and instruction!!! But if someone likes easy and work DIY projects you will be happy with this website. The main topics on this website are electronic, amplifier, fix and repair, computer tip, and some random interesting topic.Please feel free to ask any questions on my FB page and I will respond as fast as possible.You can also request DIY project here in the comment box below.



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Comments

  1. esw3/17/18, 11:56 PM

    Post any electronic project you want here, I will make it for you if I can!!!

    ReplyDelete

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Resistor color code

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A resistor is the most important electrical component in almost every electronic circuit, it can limit current to any load such as led, transistor, op-amp, etc.  We must read the resistor color code if we want to know the resistive value, tolerance, temperature coefficient. Resistors have different color bands (3,4,5,6) the more color bands the more resistor information. Now let's start with 3 bands resistor color code. The above resistor has only 3 bands First digit, Second digit, and multiply. A 3 bands resistor color code has a fixed +/- 20% tolerance which means if the color code value is 1,000 ohms the real-life resistive value may be +/- 200 ohms.  4 band resistor color code A 4 bands resistor color code has a tolerance value color strip, the resistor on the above picture has 5% tolerance. This type of resistor uses in a regular circuit such as television, radio, washing machine. 5 bands resistor color code A 5 bands resistor colo...
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How to add power supply filter capacitor to amplifier board.

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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. However, If an amplifier has high-frequency power supply noise from a switching power supply, small capacitor need to parallel to a power supply and must be attached close to power amplifier IC as much as possible. Below pictures are the place that you add power supply capacitor. PAM 8610 board amplifier powe...
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