[sdiy] Impressive collection?

[Colin Fraser]

> -----Original Message-----
> From: Martin Czech [mailto:czech at Micronas.Com]
> Sent: Monday, January 29, 2001 10:28 AM
> To: colinf at ntlworld.com
> Cc: synth-diy at node12b53.a2000.nl
> Subject: RE: [sdiy] Impressive collection?
>
> Just some hardware in the PSU that takes some days to melt
> short or open
> will do the trick.  Perhaps underdimensioned resistor....
> I have seen chemical devices, you know, in ancient times charge
> was measured in grams of deposed silver.
> There are chemical "wear out" indicators which change colour over
> time. Perhaps something corosive could make a circuit open.

Of course, large manufacturers of domestic electronic equipment already use
such parts - carefully selected to fail after a set time depending on the
warranty period of the unit.
I think they pinched the idea from the motor industry.

;-)

Colin f