How complicated a circuit would you need for this to work?
A simple, hollow cube, each side with about 25 LEDS on it (looking a little like a Rubix's cube). I would then want these light to either..
- turn off one by one in a sequence (which could be mirrored on each side or be different)
- have the light turn off one by one in a random order
I was also thinking of having a timer so the speed of the sequence could be slowed or sped up. So it could go from taking 15mins for it to turn on/off, to up to about 4-5hours.
Thank you so much for any help, this would reallllly help my project out if anyone has any advice on this or knows where I could get advice on this. Thanks :D
Thank you for all the help :) Searching those things will really help me. I have no knowledge of electronics at all, but we've been set a lighting project at university. We don't have to make any of the electronics or make it work, but we need to be able to prove that it *would* work if made in industry / had more knowledge. These links and equipment stuff really helps, thank youuuu
You can use software or hardware (like almost any other circuit).
Unfortunately I've forgotten most of my electronics.
You'll be working with some kind of shift register. Look up things like Johnson counters, ring counters, sequential logic, etc. You might even check combinational logic for a semi-random affect.
You will need some sort of clock, like an oscillator, frequency generator, or something simple like a "triple nickle" (search 555 timer).
You can use simple RC networks for short time periods like 15 minutes. For long term timing up to 4-5 hours might be a little trickier. I've forgotten most of this stuff and can't think of anything off the top of my head for long term timing other than a processor or a counter combined with a 555.
I think fairly complicated, and perhaps quite bulky - it probably wouldn't fit inside a box the size of a Rubik's cube, for example (esp. if it needs a battery too). Like Aercz says, this probably isn't really the best place to ask.
The easy alternative would be to just use a programmable controller, like a Mini Maestro / Arduino - but that might be considered cheating...
Not that complicated. Just look up LED sequencer circuits. It's like a timer, a counter, a few resistors, a hand full of LEDs, a capacitor, etc. For increasing and decreasing speed I'm guessing you're going to need and oscillator to control the speed of the clock. Search google for circuits and kits I'm sure you can find something close to what you want to play with on a bread board.