Line Following Sensor (DIY)
This is my attempt to create a simple line following sensor on my own. These sensors can be easily bought but it can be quite expensive considering that the components on it are quite simple. It’s been some time since I’ve played with passive components and analogue design. I will be using the humble op-amp (operational amplifier) to compare the …
Interfacing with Rotary Encoder
Rotary encoder or rotary switch are mechanical sensors that can track the direction and distance of a rotation movement. It is commonly used as digital volume knobs (where the rotation is endless, unlike a potentiometer). More advance types of rotary encoders are used on robots to track the distance of its’ movement. I got this rotary switch breakout board from …
PCD8544 Nokia 3310 Graphical LCD
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 …
Arduino + Visual Basic : Servo Control
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 …
Bluetooth Controlled Relay
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 …
Persistence of Vision
Persistence of vision is a phenomenon where our eyes retain images for a fraction of a second. By taking advantage of this phenomenon, we can quickly project images by portions and the human eyes will still perceive it as a complete image. Persistence of vision or POV in short is commonly found in electronic projects and there are a multitude …
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