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555 Timer Flashing LED

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I found a 555 Timer IC from an old PCB and decided to play with it.┬áBasically what a 555 Timer does is provide time delays by creating oscillations. Just imagine it like a function generator but only for square waves. I don’t have much knowledge in the 555 Timer but from what I’ve read so far, it has 3 modes …

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Arduino Playing a Melody

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There are many ways a microcontroller can display its’ output, but they can be categorized into three types, sight, motion and sound. Sight means that the output is visual based, such as LEDs and LCDs. I’ve done many examples on that so today I’m going to step into new territory, sound. To produce sound, we need a speaker. Normal speakers …

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Arduino Fake Screenshot Trigger

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I think most of you will be wondering what I’m on about. For those of you who are working in an office, and you have a computer on your desk, most of the time you’ll tend to surf the Internet when there’s less work or when the boss is not around. This is all nice but what happens if your …

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Arduino Controlled by Visual Basic Program

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Before this I’ve always used the Serial Monitor of the Arduino IDE to communicate with the Arduino. Actually what the Serial Monitor does is basically reading or sending data through the Serial interface. In my future project, I want to create an application in the computer that allows the user to click some buttons to control the Arduino. Currently, the …

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Arduino Voltmeter

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I’ve been experimenting on ADCs alot recently and I suddenly thought of doing this small experiment. I’ll try to turn my Arduino into a voltmeter by using its’ analog input and the very powerful map() function. I’ll be using a HD44780 character LCD to display the voltage output and a 10k potentiometer to vary the input voltage going into the …

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Microchip PIC16F877A ADC Configuration

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I’ll admit that the datasheet is very confusing especially for beginners like me. In this post, I’ll attempt to summarize everything I know about the ADC on a PIC16F877A and hopefully it will be informative to my dear readers. First and foremost, we must have a clear picture on what the built-in ADC is doing. Think of it like there’s …

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