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Arduino Tip : Turn your Analog pins into Digital I/O

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Recently I’ve just found out that I can actually turn my Analog input pins into Digital Inputs or Outputs. It’s really simple. Usually for the digital pins, we write instructions such as digitalWrite(13, HIGH). To do that with analog pins, simply use digits 14 to 19. Pin 14 being Analog 0, 15 being Analog 1 and so on. Or you …

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Arduino Twitter Feed Viewer

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The reason why I got the Ethernet Shield is because I found that there are lots of interesting things to do with it. One of it is to make the Arduino obtain live twitter feeds from the Internet and display it on an LCD. I got the inspiration from the example Twitter sketch in the Ethernet Library. I just modified …

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Arduino SD Card

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The Arduino Ethernet Shield I bought last week also has a MicroSD card slot on it. It allows the Arduino to read or write files on the memory card and this is particularly useful for data logging purposes. Yes, you can use the EEPROM on the Arduino but it’s only limited to 1024 bytes and it’s not removable. This shield …

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Arduino Ethernet Shield R3

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Got myself an Arduino Ethernet Shield R3, the latest revision. I made an unboxing video for it, though it may be boring to some of you but I hope it’s at least informative 🙂 The box. The header pins are gold plated. The Wiznet W5100 chipset, the heart of the Arduino Ethernet Shield. The Ethernet Shield stacked on top of …

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LCD Smartie PCB

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If you’ve read my previous post on LCD Smartie, you’ll realise that I made my circuit on a breadboard. I liked it a lot so I decided to make a permanent PCB for it. I’m doing this so that I can practise my soldering too. I will be using a pre-made PCB because it’s quite a simple circuit. This is …

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Two Arduinos Talking To Each Other

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I wanted to play with keypads so I went to look for one at Jalan Pasar, but unfortunately they all cost at least RM20. I just wanted something cheap to experiment with first. So, I asked the salesperson are there any keypads that are cheaper than those, she immediately reached for a shelve and took this out. It’s a paper …

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