I totally agree that it is a good idea to keep track of which wall wart goes to which device - I usually do that myself. For instance, I have the meLaboratories EPIC programmer, which uses a 16 volt wall wart. This is a slightly odd value - the programmer won't work properly with a 12 volt wart, while the 1 volt output might be too much for devices with internal regulators. So it is labeled and kept with the EPIC. The problem here (Microtek) is that there is nothing anywhere on the power module or on the scanner to indicate that there is anything special about the combination - that using a different 12 volt wart will likely kill the scanner. Now, that warning IS on the website IF you go to the knowledge base and ask "which power module does my scanner need?" - you will get a list of models with their matching power units AND a warning that using the wrong one WILL damage your scanner. But actually, the fact that you are searching for info on power supplies, suggests that the damage has already been done, only you don't know it yet. So my original opinion here stands - that manufacturers who do things like requiring a specific power module for a specific device model should make that very obvious - especially when a mistake can cause destruction of the device. Label the case and module, use different colors, use a keyed plug on the wall wart. Something. But that's just my opinion - YMMV RJG > > ----- Original Message ----- > From: "Gerhard Fiedler" > To: "Microcontroller discussion list - Public." > Sent: Friday, May 13, 2005 8:08 AM > Subject: Re: [EE]: looking for schematics or other info on > Microtek4900scanner > > > > William ChopsWestfield wrote: > > > > > Entertainment happened when there was a big building move (throw your > > > phone, keyboard, power supplies, etc into a box, then take them out at > > > your new cube/office and put them back together...) > > > > :) That's why the first thing I do when an equipment comes with a wall > > wart is to write the name of the equipment on the wall wart and put a > label > > on the cable near the plug (I keep most of my wall warts under the desk, > > and usually want to know what cable belongs to what). > > > > Gerhard > > -- > > http://www.piclist.com PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist