That's a pcb print not a circuit diagram,, i'm guessing it's a 555 and Cd4017 chip...Will also post pics with my cell phone shortly, so you can see the finished product. Thanks for the help. I am trying to get this working so I can use it with fiber optic threads on an HO scale drive in marquee sign.
Will also post pics with my cell phone shortly, so you can see the finished product. Thanks for the help. I am trying to get this working so I can use it with fiber optic threads on an HO scale drive in marquee sign.
Welcome to AAC!
@Dodgydave is correct about the 555/4017 according to the spec sheet available here:
No schematic that I can find but a clear photo of the completed board top AND bottom will help a lot. Maybe that fresh battery will fix it.
Good luck! Thanks dodgy, I put in some pics. and completed two of them. neither works.
Thanks, check the pics and you can see they are correct as far as I can tell. the 555 has a dot on the left and no notch at all. is it possible its reversed?My only thoughts are polarity. Make sure the chips are correctly installed observing the notch on the chips for correct orientation. Next make sure all of the LEDs are installed correct polarity and finally C1 is a polarized electrolytic capacitor and must be installed correctly. Everything should look like this when assembled. There really is not much to the circuit and with all parts correctly placed it should work just fine.
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by Jake Hertz
by Jake Hertz