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Category Archive for: ‘Arduino’

PCD8544 Nokia 3310 Graphical LCD

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Remember the good old Nokia 3310? For display, it’s using a Philips PCD8544 Graphical LCD. It features a whopping 84 x 48 pixels of resolution to ensure true clarity when playing Space Impact or Snake II 😀 Apparently now you can buy a module with this graphical LCD on it for around RM 10 shipped from China. Well, if you …

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Arduino + Visual Basic : Servo Control

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To start off, here is a demo video on how the program works. Servo motor provides angular control to users, and unlike normal DC motors, it can only rotate from 0 to 180 degrees. It is very accurate and are often used in robotic applications. Normally every servo motor has 3 connections, 5V (Red), Ground (Black) and Signal (White). The …

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Bluetooth Controlled Relay

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A relay is an isolated switch, there is no connection between the switching device and the connection. Relay is often used when controlling high voltage devices so that the intricate low voltage devices will not be damaged. There are many types of relays but the most commonly used ones are electromechanical relays. They are cheap, simple and provide very good …

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Arduino Tip : Built-in Pull-Up Resistors

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I’ve just found out a pretty awesome feature on the Arduino, or rather on all ATmega 328Ps. Below is a simple circuit that uses an ordinary push button to light up an LED. Normally I’ll need a pull-up resistor as shown in the red box, but with the built-in pull up resistors, I can totally remove that part and save …

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Arduino Bluetooth LCD

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Did a simple test with the Bluetooth module, send a text from the computer and display it on an LCD. Useful for displaying messages wirelessly, something like the queue counter displays you see in banks. I used the same exact sample code from the Arduino IDE. You can find it in File -> Examples -> LiquidCrystal -> SerialDisplay. Just connect …

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Skylab SKM53 GPS Module

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I got this GPS Module from ebay at just under RM 80. It’s not cheap but this is the cheapest solution to get GPS signal for any electronic projects. The module has a built-in GPS antenna and also the Skylab SKM53 chip. The moment when I tried to plug the module on a breadboard, I realised that the pitch of …

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