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Category Archive for: ‘PCB’

Pinguino PIC18F4550

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I’m trying out the Pinguino platform, which is made for Microchip PIC MCUs and it mimics the Arduino environment. It uses programming syntaxes that are very similar to the Arduino environment. It is to make the programming of PICs easier. Since it’s an open source platform, the firmware (bootloader) and schematics are openly available at their website. I’m using a …

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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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74HC595 Shift Register Tutorial

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Shift register is a sequential logic circuit consisting of flip-flops. They are created mainly to store digital data in the form of bits. The basic working principle of a shift register is the user would enter data into it sequentially and the data will move from the beginning till the end of the shift register. Any bits that ‘flow’ out …

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Salvaging Valuable SMD IC

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I’ve got a non-working Pickit 2 clone lying around. It uses the popular PIC18F2550 because it has USB capabilities. A quick check on Element 14 says that this MCU costs RM 19. That is an expensive microcontroller. Normally a heat gun is required to remove SMD components but I couldn’t be bothered to buy one just to remove a few …

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L298N Dual-Channel 2A Motor Driver

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I’m working on a new project which has two 12V DC Geared motors. Below are their specifications. Its’ rated current is 410mA but if it is stalled, it requires a whopping 1.8A. Stall current is the highest current that the motor will consume when the load is too much (causing the motor shaft to stop turning). When choosing a suitable …

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