Just assume that it's not in a defined state?
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From: s0lstice on 6 May 2008 05:04 On 4 May, 21:38, Tomás Ó hÉilidhe <t...(a)lavabit.com> wrote: > On May 4, 8:27 pm, Dombo <do...(a)disposable.invalid> wrote: > > > You could save two I/O pins if connect the input buttons to a voltage > > divider network on one side and the other side of the buttons to an > > analog input of your uC. > > Thanks for pointing that out, it hadn't crossed my mind. I'm looking > into it. > > Now I just need to find something frivolous to do with two extra > pins :-D Any ideas? I've already got seven segment displays and a > piezo speaker. What else can I put on it? It's a shame they don't have > chips that can give out a smell :P Put half an amp through your LEDs without current limiting resistors and you may create one ;->
From: s0lstice on 7 May 2008 04:34 On 6 May, 21:39, Hans-Bernhard Bröker <HBBroe...(a)t-online.de> wrote: > s0lstice wrote: > > Put half an amp through your LEDs without current limiting resistors > > and you may create one ;-> > > Actually, I would expect that to produce a sound instead. As in: PING > and they're gone. It might not be the LED that goes.
From: CBFalconer on 7 May 2008 11:26 s0lstice wrote: > Hans-Bernhard Br�ker <HBBroe...(a)t-online.de> wrote: >> s0lstice wrote: >> >>> Put half an amp through your LEDs without current limiting >>> resistors and you may create one ;-> >> >> Actually, I would expect that to produce a sound instead. As in: >> PING and they're gone. > > It might not be the LED that goes. Reminds me of the original IBM monochrome display for the PC. Set a wrong time or rep rate in the bios and the display cooks the horizontal (I think) drive transistor. -- [mail]: Chuck F (cbfalconer at maineline dot net) [page]: <http://cbfalconer.home.att.net> Try the download section. ** Posted from http://www.teranews.com **
From: Grant Edwards on 7 May 2008 12:57
On 2008-05-07, CBFalconer <cbfalconer(a)yahoo.com> wrote: > Reminds me of the original IBM monochrome display for the PC. > Set a wrong time or rep rate in the bios and the display cooks > the horizontal (I think) drive transistor. Been there, done that. Some of the registers in the original mono display controller card were write-only. Any accesses to those register's addresses were handled as writes. If you tried to read them, you ended up writing unkown values. I attempted to read the wrong set of I/O addresses using debug, and I let the smoke out of one of the high-voltage sections of the display. -- Grant Edwards grante Yow! Gee, I feel kind of at LIGHT in the head now, visi.com knowing I can't make my satellite dish PAYMENTS! |