Author Topic: flip flop question (not really robot related yet:)  (Read 1955 times)

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Offline neopj3Topic starter

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flip flop question (not really robot related yet:)
« on: December 14, 2007, 07:51:19 AM »
what would be a couple of good flip flops to use with a  555 to make three leds flash in a sequencal order? while having a little lag time between each flask so that the lights will transition between each other. x-mas gift i'm making.  thanks for in the insite.

Offline ed1380

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Re: flip flop question (not really robot related yet:)
« Reply #1 on: December 14, 2007, 11:50:45 AM »
flips flops aka shoes?
Problems making the $50 robot circuit board?
click here. http://www.societyofrobots.com/robotforum/index.php?topic=3292.msg25198#msg25198

Offline Admin

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Re: flip flop question (not really robot related yet:)
« Reply #2 on: December 14, 2007, 12:27:15 PM »
How about a counter IC?

For example, an 8 bit counter IC has 1 input (such as a 555 ouput), and there are 8 output pins that could each be hooked up to a resistor and LED. There are many types of counter IC's with different output types.

To get the time delay, you could put a capacitor in line with the output (after the resistor) and ground, where the capacitor value determines the delay.

Offline neopj3Topic starter

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Re: flip flop question (not really robot related yet:)
« Reply #3 on: December 14, 2007, 01:38:10 PM »
that's pretty much what I had in mind.  my idea is to have one (a) light up, then the second (b), then soon after have a turn off and the cycle repeats to the third (c) and then back to a.  kinda fading back and forth.  however it looks like a long "blink" per led will be the best way.  anyone know of a good timer IC?  preferably something i can pick up at frys.  thanks for the ya'll.

 


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