Author Archive for: ‘waihung’

Home Made PCB – Arduino Prototype Shield (Part 3)

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This is Part 3 and also the final part of my journey in making my first home made PCB. If you’ve not read the previous parts, here is Part 1 and Part 2. My aim of this project is to create my own Arduino Prototype Shield. With the PCB done, it’s time to turn to the components that will be …

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Home Made PCB – Etching Copper Layer (Part 2)

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This is Part 2 of my journey in making my first Home Made PCB. If you’ve not read Part 1, here it is. In the last post, I showed the entire process of etching the photo resist layer. Now what’s left of the photo resist layer (green in colour) is the actual PCB layout. Beneath the photo resist layer is …

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Home Made PCB – Etching Photo Resist Layer (Part 1)

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I’ve always wanted to make my own Arduino Prototype Shield. This shield allows the user to use a breadboard on an Arduino. It’s a very simple shield but if I were to buy it, it will cost me at least RM30. An example would be this Prototype Shield from It is sold for USD 15, which translates to approximately …

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Tools To Make Your Own PCB

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Today after work I went to Jalan Pasar to do some shopping. Went to get some tools and supplies to make my own PCB at home. I made the PCB shown above in college, it was for an IR Transmitter and Receiver project. I’ve always wanted to make my own PCB at home but couldn’t find the time and resources …

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555 Timer Flashing LED

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I found a 555 Timer IC from an old PCB and decided to play with it.┬áBasically what a 555 Timer does is provide time delays by creating oscillations. Just imagine it like a function generator but only for square waves. I don’t have much knowledge in the 555 Timer but from what I’ve read so far, it has 3 modes …

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Arduino Playing a Melody

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There are many ways a microcontroller can display its’ output, but they can be categorized into three types, sight, motion and sound. Sight means that the output is visual based, such as LEDs and LCDs. I’ve done many examples on that so today I’m going to step into new territory, sound. To produce sound, we need a speaker. Normal speakers …

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