Author Archive for: ‘waihung’

HD44780 2×16 Dot Matrix LCD

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Bought this at Ebay for only RM10 including shipping. This came all the way from China, hence why it is so cheap.¬†Took around two weeks to arrive and here it is. Apparently a paper box is too costly but thank God it arrived in one piece. The connector shown does not come with the LCD, I bought it separately so …

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Microchip PIC16F877A Analogue to Digital Conversion

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As mentioned in the previous post, the PIC16F877A has a built-in Analogue to Digital converter. What ADC does is basically convert an analogue voltage ranging from -Vref to +Vref (usually 0V to 5V) and converts it to a binary value. The ADC on the PIC16F877A has 10-bit resolution and this provides 1024 steps (2^10=1024) which is more than enough for …

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Microchip PIC16F877A

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Moving up the Microchip PIC16F Microcontroller family, we have the PIC16F877A. This is a very common MCU and it’s always mentioned in DIY projects. It’s popular among students, hobbyist and even engineers because it’s cheap. I got it for only RM23 and oddly enough that’s cheaper than its’ little brother I mentioned in a previous post, the PIC16F84A. Another reason …

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Microsoft LifeCam HD-5000


Got myself this as my digital camera died on me. The shutter on that camera is stuck and won’t close so all the photos turn out overexposed. Sadly, I can’t afford a new camera but certainly I can afford this. Bought it for RM58 at Viewnet Lowyat and comes with a 3-year warranty. I think they were trying to clear …

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EAGLE PCB Software

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PCB is the abbreviation of Printed Circuit Boards. They house all the components and contain electrical traces to connect them together. A PCB software helps in designing a PCB whether it is for a huge production or just self-made PCBs. In my college, I was taught how to use the Protel PCB software (now called Altium) and I was told …

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Electronic Dice

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This was actually one of my assignments and it’s a pretty simple project with a couple of LEDs to make an electronic dice. When turned on, all the LEDs will light up and the user have to press and hold on the button to roll the dice. Once the user lets go of the button, the rolling will stop and …

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