Those in the know, know, that if you want to play with analog circuits, using a simulator first is a really good idea. There are many analog circuit simulators out there, some free, some mega-bucks, but the most common of all is SPICE. There are many different versions of SPICE available, and lately I’ve been [...]

Here’s a little known fact about SD Cards. The little “lock” switch on the side of the card? It doesn’t lock the card.

This is a photo of a pretty typical SD card. On the left you can see the “lock” switch. You’d think that sliding this switch downwards, into the locked position, would write-protect the [...]