02:Step Sequencer Part 1 - TheTechnobear/MusicalHacks GitHub Wiki
In this episode, I build a simple step sequencer. I also cover a number of other important topics
Power options
https://protosupplies.com/product/ywrobot-breadboard-power-supply/ https://bastl-instruments.com/instruments/omsynth
Schematic for step sequencer
Voltage divider
https://en.wikipedia.org/wiki/Voltage_divider
ICs used
The ultimate source of information is the IC datasheets. these are excellent - not only do they have the specifications and pin outs, but they often contain some great examples.
please note.. these ICs are made by different manufactures, the following are therefore examples only.
Counter chip (4040)
https://www.ti.com/product/CD4040B
Multiplexer (4051)
https://www.ti.com/product/CD4051B
Hex Schmitt Triggers
this contains 6 schmitt triggers (though we only use one), you can get small packagers