Vanishing point - clock still not clocking

[lightningfingers]

I've made a completely new board with the 4093 and I KNOW its wired correctly this time. Its a verysimple circuit, only 5 parts....could the LED i'm using to test it be loading the clock down?

[The Tone God]

Ok. Stop. Breath deeply. Now PANIC!!! j/k

Let break this down. Pull out the 4017. (You did put the ICs in sockets right ?!?) Disconnect the cap (stated as 0.01uF in the schematic) from pin 3 of the 4093. Now attach your LED to pin 3 with the flat side of the LED to a current limiting resistor, say 1K, that is in turn attached to ground.

Report back afterwards with results.

Andrew

[lightningfingers]

LED pulses at frequency determined by 100K pot  :lol: I wonder why then, it didnt work with a plain LED (no resistor)....
Well Thanks for that, now I just have to build the part with the 4017 (i started a completely new board as the last one didnt work...decided to make sure each part is fully working before moving on)

[The Tone God]

Good idea to start over and work bit by bit.

Using an LED with no current limiting resistor is a bad idea. The LED will pull too much current from the IC which is probably why it didn't work.

Good luck.

Andrew