2 Apr

Originally posted on MAKE:

It’s amazing what a little disk can do … when it’s layered with piezoelectric crystals. Piezo disks are impressively sensitive to vibration and can easily be adapted to work as a contact microphones. The trick is the preamp – a basic circuit used to match the piezo’s signal to levels compatible with modern audio gear inputs. The resulting piezo/preamp combo can be used for electrifying an acoustic guitar or simply exploring the lesser-heard world of small sound around us.

Piezo Preamp

Schematic for piezo preamp

The preamp I built is a variation of James T. Hawes’ design. In order to simplify construction, I reversed the MPF102’s source & drain connections from their usual orientation – which works fine in this case.

This thing really is an awful lot of fun to play with – you’ll likely here it used in some of my upcoming video soundtracks!

Subscribe to the MAKE Podcast in iTunes

View original 21 more words

31 Mar

Originally posted on hallrich037:

car-lokee-likee

View original

car-lokee-likee

31 Mar

car-lokee-likee.

Aside 31 Mar

A picture is worth 1000 words. This safe has been through a lot. Tell its story. Image credit: “safe” – © 2007 Paul Keller – made available under Attribution 2.0 GenericImage

31 Mar

looks like a young lady I used to know. wish I’d seen her naked!

Image

car-lokee-likee

31 Mar

car-lokee-likee

Image

yng-wankin-cock.jpg

31 Mar

yng-wankin-cock.jpg.

Follow

Get every new post delivered to your Inbox.