Rhesus3000
New Member
Hello community!!
Long story, short. I made a 16 step seq, used two 4017 ic's and a TLC555 as clock. The two 4017 counter are cascaded as datasheet prompts to. My "touch" was that i used only "7" outputs including "0" (bad idea??) for the first 8 steps and output number "8" as a trigger to "activate" the second 4017 via AND gate. The second 4017 starts from output number "1" to "8" ("0" not used)...and "9"as reset to first 4017. And of course i included a diod for each output. So far so good? The result is, that my seq produces multiple steps at the same time i guess, more like a delay. Yes...it goes as it should, each step at a time without jumping and crewing it up (couple of burned leds)...but as soon i connect it to a CV input...i can hear this "echo" thing. I cant really explain what it does, but its not normal. I uploaded a video to show you
here is a video so you can understand
Supply Vol is 4.5V
The AND gate is sn74hc11n...3 input Ic...
I included bypass caps to components +bulk cap
Dont know if it is a problem anyway, but my multmeter shows that Voltage output of steps (one by one) measured before the diod...is never "0" when step "inactive"...it stays at 0.50~0.70V. (clue?)
Long story, short. I made a 16 step seq, used two 4017 ic's and a TLC555 as clock. The two 4017 counter are cascaded as datasheet prompts to. My "touch" was that i used only "7" outputs including "0" (bad idea??) for the first 8 steps and output number "8" as a trigger to "activate" the second 4017 via AND gate. The second 4017 starts from output number "1" to "8" ("0" not used)...and "9"as reset to first 4017. And of course i included a diod for each output. So far so good? The result is, that my seq produces multiple steps at the same time i guess, more like a delay. Yes...it goes as it should, each step at a time without jumping and crewing it up (couple of burned leds)...but as soon i connect it to a CV input...i can hear this "echo" thing. I cant really explain what it does, but its not normal. I uploaded a video to show you
here is a video so you can understand
Supply Vol is 4.5V
The AND gate is sn74hc11n...3 input Ic...
I included bypass caps to components +bulk cap
Dont know if it is a problem anyway, but my multmeter shows that Voltage output of steps (one by one) measured before the diod...is never "0" when step "inactive"...it stays at 0.50~0.70V. (clue?)