[sdiy] Free stuff - ideas? Also, ringmod schematics?

[Andre Majorel]

On 2005-08-14 23:19 -0400, Eric Honour wrote:

> While driving back tonight I came across a computer (133 mhz), a dual
> cassette deck, and a pair of computer speakers (in that order, spread
> throughout a neighborhood).  Since they were all free I have no
> worries of screwing any of them up, but I can't right now think of
> anything fun to do with them... any ideas?

You could drop it at you parents' so that you have something to
check your mail with when you visit them. Or install Linux and
make yourself a firewall, FTP, maybe HTTP server. Or configure it
as an X terminal for checking schematics while working at the
bench.

> Also, a friend of mine works in a junkyard and said he could get me
> car audio equipment cheap or free.  If he isn't a complete flake
> (which he often is) I may get some speakers, but would it be possible
> to use the car amp as the basis for a line-level amp?  Some car amps
> are really high powered for the price I'd be paying (fifty watts x 4
> channels for less than ten dollars)... so if it works out, I could
> save much money on amps.

You'll still have to find a 12V/17A linear power supply, which is
not cheap, and they probably won't sound very good.

> One last question.  I know it's possible to make a passive ringmod out
> of 2 transformers and a few diodes, but I can't for the life of me
> remember how.  Anyone have a link to schematics?  I had one bookmarked
> before my computer crashed, but it's gone now...

http://cgs.synth.net/modules/cgsrr.html

-- 
André Majorel <amajorel at teaser.fr>
http://www.teaser.fr/~amajorel/