JSCalc

You have downloaded that movie four times and progress bar is still crawling. You check your bill and it clearly states you’re paying for a … Read More

Estimating a wireless link is kind of like stuffing a suitcase for a vacation that hasn’t happened yet. You know how many bits per second … Read More

The clock divider creates a slower clock from a faster one, at an exact whole number ratio. The underlying formula is straightforward: fout = fin … Read More

Is it oscillating like an out-of-tune orchestra? Your microcontroller won’t lock. You’ve used the right part number. You can read the schematic and everything seems … Read More

Inexpensive: The 555 timer is cheap, but it also has lots of application. Want to create a precise pulse generator for a hobbyist robot? No … Read More

The way pulse width modulation functions is to turn a voltage on and off rapidy. To your eye… Or to some sort of mechanical load, … Read More

If you’ve worked with an Arduino hooked up to a motor, then you know that the resulting high-pitched whine sounds like this: You control how … Read More

If you’ve ever watched a movie where a helicopter’s rotors seem to turn backwards, you’re witnessing an example of something called aliasing, a sampling artifact … Read More

But then you connect it to an analog-to-digital converter. Your pretty analog signal gets converted to an ugly digital one. There’s all this nuance and … Read More