>I was also quite surprised that such a simple component would die, >and what I find more confusing is that it died while I was using >the machine.
A 555 can also take a Commodore PET down because it's solely in charge of the RESET circuit, and no RESET == no PET. On 2 November 2017 at 14:22, Aaron Jackson via cctalk <cctalk@classiccmp.org > wrote: > Thanks! It was very satisfying and not the worst thing to go wrong > for a beginner. > > I was also quite surprised that such a simple component would die, > and what I find more confusing is that it died while I was using > the machine. > > Aaron. > > Noel Chiappa via cctalk <cctalk@classiccmp.org> wrote: > > > > From: Aaron Jackson > > > > > Picked up a few 555s and sockets and now it works! > > > > Congratulations! > > > > It's odd that a 555 failed, but sometimes there's no rhyme or reason to > what > > fails. E.g. I was fixing some broken M7859's (KY11-LB Programmer's > Console), > > and on one of them a 7493 (4-bit counter) had died. That's not one of the > > 'problem' 74xx chips, like ISTR the 7474 being? > > > > Noel > -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk
