Just wanted to get this out there before I forget about it, so I won’t have the schematics up.

This is your basic audio amplifier without any filters or fancy stuff. The little breadboard on the right has the pre-amp stage, a simple inverting op-amp amplifier with a gain of 4 V/V or so to get the voltage up. The one on the big breadboard on the left is the Class AB stage amp that provides the current to drive the speakers.

All that is plugged into my iPhone on one side and some computer speakers (without internal amplifier, that would be cheating) on the other. David Crowder Band – Wholly Yours is playing! You can see the waveform on the scope in the background, too!

Here’s the video, enjoy!

Recently I switched from Opera to Safari, more precisely the Webkit nightlies. The main reason is the great 1Password password manager and form filler that takes care of all my logins and more so that I can be more secure on the web.

One of the main things I missed in Safari that I came to love in Opera are mouse gestures. I checked out the programs most often recommended, but they either didn’t work anymore or cost money now. Until I stumbled upon SafariGestures. It’s a SIMBL plugin (I use PlugSuite instead, either should work) and adds a menu item to your toolbar. From there you can set a plethora of preferences and customize it to your needs.

I actually prefer it over Opera’s mouse gestures; so far it’s been a good switch!