4-step 4017 Sequencer
Jun 2
2010
2010
This weeks project is a simple 4-step sequencer based around a 4017 decade counter chip. The basic schematic is based on this circuit, using a 555 timer as a clock source:
I changed it a bit by having the 4017 outputs drive transistors that switch current to the pitch pots (instead of turning on LEDS). Also, I triggered the chips RESET on step 4 instead of using all ten steps.
The sound is generated by a toy piano that I hacked up. Each of the four steps in the sequencer is routed through a 100K pot that varies the resistance to the piano and triggers different notes. I also threw in a touch point for garbling up the sound.
Here it is in action:
Comments
CamRen
What type of transistors did you use with the outputs of the 4017? Also where did you have the CV plug into? I could use some help. I am still breadboarding this and can't figure it out.
Valter
Hello Mr. Metoyer,
I am trying to build a sound sequecer with LEDs with the 555 and the 4017. After watching your video i was really excited by it but cannot get the resultas as you have. So heres a couple of questions I would really apreciate you could answer me:
Are you using an audio amp right? I try with speaker plug but i can only get to hear low pitch.
Now the more important: Could you provide a full schematic with the circuit of the 4 step sequencer. Yours isnt the one you show on the video. Im having dificulty driving a speaker and leds at the same time, so my question is all about how to get diferent sounds with led at the end of each output
Jonas
Damn, I've tried so long to make this stupid 4017 work lol, and this is the first schematic that actually works, at least with leds... THANKS!