8 Jul
2005
8 Jul
'05
3:55 a.m.
On Thu, 7 Jul 2005 20:23:16 +0100 (BST)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Figuring out alien unmarked and complex resistor networks is a nerds
treat. It's a mathematical puzzle in physical form.
Even where IBM
cards of that era used 'commodity' components, they
were usually completely house-marked and impossible for a mere
mortal to figure out. This goes all the way down to resistor
networks and resistors/capacitors (except those few that have
color-code bands.)
Yes, but it's easy to measure the value of a resistor or capacitor,
and even resistor networks can generally be figured out. HP used
custom house-coded resistor netowrks in some of their products and it
didn't stop me...