M3DVQ wrote:Also very important to make sure that whatever is driving your matrix can't ever stop clocking with the led driver still active! It would be much like burning a dot into a CRT only there might be a bit more smoke
Urk! yes indeed...
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Steve Anderson wrote:Interesting to note in Grant's newsletter item that once he sorted out a few LED driver problems the intensity was sufficient, even at this very low duty-cycle. So maybe this is a go-er.
I think that it would be a worthwhile experiment though to knock-up a 555 to drive a LED at this very low average current, a simple breadboard exercise that should only take a few minutes.
Steve A.
Viewmaster wrote:I have to apologise to you Steve
harry dalek wrote:Hi Albert
The`4017 is an ic i have played around with on its `own i can see string them together as you think might work ...i was thinking about an easy way to modulate the the string of leds while also scanning...do you think this might work ? simple like me .
Could you use the sync from say the club circuit and use that to sync the clock i am thinking the clock has to be faster than 400 hz ...is it that times the number leds you use per line ?
M3DVQ wrote:That is quite a lot of LEDs isn't it
Even buying surface mount LEDs on tapes of 1000 it's going to be dear. What colour were you planning on doing it?
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