hi,Originally Posted by MrDEB
The OP did say 20mA.
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- 100 LED Display - Please help, my job depends on it!!
hi,
The OP did say 20mA.
Eric " Good enough is Perfect "
I will NOT answer PM's requesting technical help, please use the Forum
PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/
Link to my Articles: http://www.electro-tech-online.com/a...icgibbs-55450/
Well then a 3A wall supply.
For life expectency = 15ma
sure 20 ma is the norm but 20% or so is perfered.
You car may go 100mph but do you ever run it to the max??
In my designs I shoot for 15-18ma max
Modern LEDs are pretty bright with less current than older LEDs. Just get them with a high MCD rating.
Bill,
I would use 100 large red marbles in a end lit, clear plastic tube.
Drop in a marble as required.
Zero energy.
Eric " Good enough is Perfect "
I will NOT answer PM's requesting technical help, please use the Forum
PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/
Link to my Articles: http://www.electro-tech-online.com/a...icgibbs-55450/
Well the OP better get cracking with whatever design he plans to use. I like the marble idea but I suspect they would get pretty dim after it started filling up.
her are the specs for bargraph leds
DC20/20SRWA Super Bright Red (GaAlAs) WHITE DIFFUSED 8000 31000 20 Segments
Bargraph-Displa
Not a good question.
My last car (Ford Scorpio) had a max speed of 200km/h resulting in an 8 hour trip from Hamburg to Munich, which meant a bad ratio of travel time vs. work time. (very often a one or two hour job to do)
After tuning it made 280km/h ensuring a travel time of not more than 5 hours.
Only flying is faster.
Bonuk
Proper Planning Prevents Piss Poor Performance
yes I have heard of the Autobahun
supposly has the least traffic fatalities per mile than any other highway in the world
and an unlimited speed limit to boot
go figure.
but then I guess you never drove on a S. cal freeway
max speed is like 30 if your lucky.
I did too, felt like being able to pick flowers on the way.
BTW, speed limit in German cities is 50km/h. Going through Munich at 80km/h police still waves their hands to speed up.
Proper Planning Prevents Piss Poor Performance
Wow! And I thought Bill's idea was minimalist genius.Bill,
I would use 100 large red marbles in a end lit, clear plastic tube.
Drop in a marble as required.
Zero energy.
Add a 5w bright red laser shining up from the bottom of the tube to make the marbles glow (and maybe a brightness adjust knob) and that would be a fully workable and visually beautiful display.
Add a pic controlled device
that drops a marble into the tube, makes the laser blink then an alarm sounds!!
sounds like a great idea
lets see you need a pic with software then a 2803 to drive the servo motor that controlls the elevator that gathers up a marble or more as needed then transports the marble/s up to the top of the "SB1" rocket and deposits them
the laser then blinks by way of a pic comand.
have a light sensing cell so at night when nobody is at work, the laser shuts off to save energy. Of coarse in the pic code you need to puyt the pic in sleep mode.
the op had better get cracking and maybe Bill will program the pic for the op
LOTS TO DO. only 8 days left.
sure hope parts have been ordered.
are you sure a 5W laser is big enought?
maybe program the pic to measure the weight of the marbles and switch on a second and/or third laser according to the weight/# of marbles
LOL
And it's gotten complex again. K.I.S.S.
You're right MrDEB, I would have done it with a PIC & a 10x10 matrix for the LED wiring.
PS firing a laser through glass marbles is not a good idea. Unless you're building a blind-o-matic.
The op would have been better off
going the pic route.
would be a simple up count code with option to count down if need be.
actually the pic would have been easier maybe than the dip switches.
My question is why did the op start throwing 74164's into the mix?
going from A to B via C, D, and E. IMO
I really like the laser idea could be exciting
8 days left!!
WARNING WARNING
only 8 days until blast off of the SB1 rocket
wonder how its comming along
getting comcerned as we have no contact!!!
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