I know this topic had been discussed quite a few timesthroughout this great forum, but I dont think there has been one which is like mine.
Well for the past few weeks Ive been trying to make a LED chaser circuit on a strip board, but Ive been having problems with it.
This is the diagram Ive been folowing.
Which comes from this site.
http://www.electronicecircuits.com/electronic-circuits/4017-led-knight-rider-circuit-diagram
Couple Qs on it too. There are a couple unlabelled pins on there. I believe pin 3 of 555 is connected to 12 of 4017. 8 and 16 are positive and negative. Could someone confirm which pins they are.
Instead of 6 LEDs, Im only using three, so i stopped and reversed the sequence at pin 7(I think thats what Im supposed to do). So in theory it should flash left, middle, right, right, middle left, repeat...(flashes back and forth) Thats what I was aiming for, but it simply isnt working.
Maybe someone could help me with a simple strip board design(most compacted using normal sized components) or a new circuit diagram to accommodate three 3mm red LEDs.
Ill take some pics of what I have so far tomorrow arvo. Basically I have followed everything in the diagram, cept that I reduced it to 3 LEDs. Still only have the diodes soldered, since it isnt working. I believe that it may come from the 555. Output is not pulsing when measure with a multimeter.
Thanks
Well for the past few weeks Ive been trying to make a LED chaser circuit on a strip board, but Ive been having problems with it.
This is the diagram Ive been folowing.
Which comes from this site.
http://www.electronicecircuits.com/electronic-circuits/4017-led-knight-rider-circuit-diagram
Couple Qs on it too. There are a couple unlabelled pins on there. I believe pin 3 of 555 is connected to 12 of 4017. 8 and 16 are positive and negative. Could someone confirm which pins they are.
Instead of 6 LEDs, Im only using three, so i stopped and reversed the sequence at pin 7(I think thats what Im supposed to do). So in theory it should flash left, middle, right, right, middle left, repeat...(flashes back and forth) Thats what I was aiming for, but it simply isnt working.
Maybe someone could help me with a simple strip board design(most compacted using normal sized components) or a new circuit diagram to accommodate three 3mm red LEDs.
Ill take some pics of what I have so far tomorrow arvo. Basically I have followed everything in the diagram, cept that I reduced it to 3 LEDs. Still only have the diodes soldered, since it isnt working. I believe that it may come from the 555. Output is not pulsing when measure with a multimeter.
Thanks