EL is only good for dark places and suffer a lot from direct sun light Tal -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Aaron Blohowiak Sent: Thursday, December 27, 2001 11:55 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: big led display why not use EL (electroluminescent cable)? it can be spliced like normal wire, and i am sure it wouldnt be hard to wire up a quick circuit to control. Aaron ----- Original Message ----- From: "David VanHorn" To: Sent: Thursday, December 27, 2001 4:47 PM Subject: Re: [EE]: big led display > > > >The customer only wants two digits, and I guess I can put at least 5 in > >series, so that would be 7 x 2 x 120 x 0.02 / 5 = 6.72 A. No problem for a > >car race environment where accu's are found all over the place. But how > >large were your digits? > > > I'm pulling a similar project, a replacement for a whelen slimlighter. > > The original is driven by an 8 pin PIC, but it failed after only an hour of > use, and is stuck on one flash pattern. I'll use an AVR2343 of course. > > The slimlighter uses two banks of 4x20 orange leds. I'm using two banks of > HP hyperbright 10,000 mcd lamps Eacn bank will draw about an amp with the > LED current set to 50mA at 15V input. > > I don't know what the slimlighter led specs are, but it puts an impressive > spot on the wall across the room. > > They go for about $0.22 each in moderate quantities. > Doing projects like these, it's easy to see where 1000 leds could dissapear > real fast. > (until you turn them on!) > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu