schematic 5 led chaser circuit using 555 chip


Posted on Feb 7, 2014

Some simple 555 and flip flop circuits to add electronic lighting effects to `modernize` the games. I`m collecting quite a few for different aspects of the game - i. e. idle, flipper shot, flowers open, winning shot etc. I have a few hundred LED`s, 20 LM555`s from an ebay purchase on the way and I`m putting in an order with All Elecronics for he other components. I`m o. k. with the schematic,


schematic 5 led chaser circuit using 555 chip
Click here to download the full size of the above Circuit.

but in my ignorance, if I only use 5 LEDS, do I just leave pins open on 4017 or do I have to connect them to `something` I only want five for a model fire engine I`m building and it sits on the rear pump compartment in a five set `window` I`m already using a pair of 555`s on a strip board buried in the `tank` to control the blue lights, hazards etc. Headlights are handled by GOW bulbs on a separate 3v supply. 1/ The model will only get lit for maybe 2 to three minutes at a time, will a current of 25mA give me a reasonable (how long`s a piece of string!)life span on the LED`s 2/ Is there a way of utilising either the 555`s or the 4017 to allow a push of a microswitch to activate all the model functions and then run all for a period of time, then stop until the microswitch is pushed again 1/ The model will only get lit for maybe 2 to three minutes at a time, will a current of 25mA give me a reasonable (how long`s a piece of string!)life span on the LED`s When they are used within their max allowed current then they last for hundreds of thousands of hours. Chinese ones from E-Bay last only 1 week (168 hours). 2/ Is there a way of utilising either the 555`s or the 4017 to allow a push of a microswitch to activate all the model functions and then run all for a period of time, then stop until the microswitch is pushed again A push-the-button to turn on a circuit then push-the-button again to turn off the circuit is simple. But...




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