AUTODESK EAGLE – Tips & Tricks 1

Most hobbyists and many professionals use EAGLE CAD as a daily tool in designing schematics and laying out PCB. I’m ...

Why are Crystal Oscillators required?

Crystal oscillators have only one function. That is to provide stable clock pulses to the digital circuit. Almost all ...

How does a watch keep working at the same pace until the last drop of a battery cell?

Well, this is actually a very interesting question technically. And it gets us to how quartz movements work. I beg the ...

Matrix Keypad with Atmega8 – part 2

In the previous post - Matrix Keypad with Atmega8 - part 1, we discussed why a matrix keypad is useful and how we can ...

Matrix Keypad with Atmega8 – part 1

Many embedded applications require a large number of keys connected to a computing system. For example - a PC ...

Polling Vs Interrupts

We may have many external devices attached to the CPU like a proximity sensor, temperature sensor, buttons, etc. ...