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Author Archive for: ‘waihung’

Bluetooth Audio Mod on Car Cassette Player

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My daily commute to and fro college is a long one. Coupled with bad traffic jams in KL, I spend a lot of time in my car. I needed to play my music in the car but that would mean upgrading my old cassette player to a new one. The only feature that I’m looking for is Bluetooth Audio. Most …

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Bluetooth Audio BLK-MD-SPK-B Eagle Library

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I bought this bluetooth audio module called the BLK-MD-SPK-B from ebay and couldn’t find any eagle library for it. So I’ve made one on my own and would like to share it to anyone who needs it.

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HC-SR04 Ultrasonic Sensor on PIC

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HC-SR04 is a very common ultrasonic sensor and it is normally found in Arduino kits or projects. The library for this sensor is widely available for the Arduino platform but not for PIC. I’ve been asked to help to write a simple PIC code to interface with the ultrasonic sensor. It’s actually very simple by referring to the timing diagram. …

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Bluetooth Mini Robot

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Got another new robot kit and decided to create a bluetooth controlled robot with it. It’s from DFRobot and it’s called the MiniQ. Here it is assembled. Created a simple circuit on a donut board with a L293 H-Bridge and Arduino Nano. It is powered by a 2 cell Lithium Polymer battery. Typically each cell provides 3.7V so that amounts …

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Programming Arduino using Atmel Studio 6

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Arduinos are based on Atmel microcontrollers, and they can be programmed using Atmel’s native IDE – Atmel Studio 6. The main reason to use Atmel Studio 6 instead of Arduino IDE is because it provides better performance, Arduino IDE might be easy to use but it is slow because of inefficient compilation. It takes more cycles to execute an instruction …

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Using Internal Oscillator on ATmega328P

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I’ve been working on a project which involves a very small PCB layout, and I found it very hard to route unless I remove some unnecessary connections. Therefore, I decided to remove the external oscillator and use the internal 8MHz oscillator. To do this, you’ll need a programmer. I’m using a cheap USBASP bought from ebay. To enable the internal …

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