i've designed this cute little board that plugs into a solderless breadboard. it is a pulse generator! the frequency range is from 1Hz to 1MHz. the duty cycle is adjustable as well.
it also has a built-in voltage monitor that generates a reset pulse for your microcontroller or CPU.
design files are here: https://github.com/schlae/BreadboardGadgets/
@tubetime neat, I've always wanted to test if I could hear 1MHZ :blobcatgooglyfingerguns:
seriously though I bet that's very useful for quite a lot of different projects ranging from reviving old electronics to hardware mod overclocking to pleasantly gimmicky synthesizers