The operational amplifier is probably the most widely used component in ICs (integrated circuits). The name is self-explanatory: it is an amplifier with a high gain (40dB or more) and with additional circuitry it can be used to do a lot of arithmetic operations such as sum, difference, integrals and so on.

In this article I will try to explain you how it works.

Read more »

Here’s a short, simple tutorial on how to build a cable and connect your laptop to a TV, using the S-Video output port of the former and the SCART input port of the latter. I’ve looked for something like this for days, and I think it can be very useful to someone.
You can modify an existing cable, or build your own.
Read more »