Looking for schematic

[markland556]

Well about a year ago i had these led chaser boards made. And now im looking for the schematic i used for them. Here are the specs of it:
4 sets of leds moving.

It uses a 4017 with a 555 timer and a 0.1uf cap and a 47uf cap. It also uses 3 resistors and 4 transistors.

Im just wondering if anyone has a schmeatic like that anywhere.

 

[penoy_balut]

555 timer is for clocking 4017, 0.1uF bypass cap, 47uF for timing 555, 4 transistors to drive leds, 10 outputs are possible with 4017, diagrams are available at application datasheets of these ICs.

 

[HarveyH42]

Do you still have the boards? Should be tough to work in reverse.

 

[Hero999]

Exactly, look a the pinouts on the datasheets which can be found from Google, then see where the tracks connect them to the other componants.

 

[philba]

That sounds like a bowden circuit though the ones I saw had more LEDs, probably very close - **broken link removed**