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Author Topic: Random or Pseudorandom blinking  (Read 5123 times)

Allanmenef

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Random or Pseudorandom blinking
« on: September 04, 2003, 05:30:27 PM »

I am working on a "power failure" mod, and I am looking for a way to blink 10-20 different white leds at seemingly random intervals.  It doesn't matter if it is truly random or not.  These LEDs will need to blink independently from each other as well.  I was advised that some creative circuitry and a 4060 clock chip would work, but although I am handy with a soldering iron, I am not that experienced at things like resistors and such.  I can build it if someone can give me a diagram example.  

As I said, "power failure" is the look I am going for.  Thanks in advance.
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Zero Nova

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Random or Pseudorandom blinking
« Reply #1 on: September 04, 2003, 07:16:52 PM »

sorry if im not catching on here, but can you explain a little more what a "power failure" look
actually looks like
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Skylined

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Random or Pseudorandom blinking
« Reply #2 on: September 04, 2003, 08:52:04 PM »

Search for CMOS Counters.
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Allanmenef

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Random or Pseudorandom blinking
« Reply #3 on: September 05, 2003, 08:36:41 AM »

The only example I can think of is Star Trek (I know...) This effect can be seen a lot in damaged ships.  Panels going on and off, blinking lights, sparks,etc.  Now, I don't want sparks shooting out (well, maybe....no)

I have looked at timer chips such as the 4060 and the 4777, but as I mentioned earlier, I am not very experienced at scratchbuilding circuits.  Maybe once I build my hard drive chaser I will understand a little better.  Heck, I had one of those RadioShack 100 in 1 electronics kits, and I never did figure out the the flip-flop chip was for.  :P
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Skylined

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Random or Pseudorandom blinking
« Reply #4 on: September 05, 2003, 11:54:00 AM »

There are several types of flip flops, they are latches, in common words it's a memory.

And again, search for CMOS Counters.
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renderblender

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Random or Pseudorandom blinking
« Reply #5 on: September 05, 2003, 01:23:37 PM »

A good site to get some free timers, latches etc. is www.ti.com you can get free samples.
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Allanmenef

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Random or Pseudorandom blinking
« Reply #6 on: September 07, 2003, 09:14:26 PM »

Okay, I found the wiring schematics I needed, but now I need to figure out how to get between 6 and 9 volts wo the circuit.  I bought a connector for my PCB that fits a FDD power connector already, and hacked one out of a CD drive for the larger molex connector.  I know there is 5v and 12v built into the power supply, and the chip I use regulates itself.
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daPyr0x

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Random or Pseudorandom blinking
« Reply #7 on: September 07, 2003, 10:05:24 PM »

Allan: you can get 7v by using the +12v in the molex as vcc and the +5v as ground.
12-5 = 7.
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viridius

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Random or Pseudorandom blinking
« Reply #8 on: September 07, 2003, 10:42:51 PM »

Actually, Winterstick made a semirandom blinking circuit here.
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Darkstrike

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Random or Pseudorandom blinking
« Reply #9 on: September 12, 2003, 06:15:30 PM »

Sounds like a pretty interesting mod u're planning on there, I think that would look quite cool. You should probably put a few different colored LEDs in there as well to make it different...
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