Post by NightMachines on Sept 30, 2018 20:23:44 GMT
I had one more blank panel in my rack which needed to be un-blanked. So I looked at the ICs I had left over in my DIY drawer and built a module around them. I call it “The Grand Square” 
First, I made two square wave LFOs from a CD40106, following this Hackaday guide.
A question I have about this is wether I can leave the unused pins of the ICs floating like that. Seems to work fine like this too, but I’m not sure. I blew two of the ICs during the initial design process for some reason, but I might have just been careless with throwing other components into the mix.
Then I added a 10-step counter with clock input and carry pulse output from a CD4017, as well as six OR-wired sockets, according to Dieter Doepfer’s A-100 DIY Page schematic.
Of course there was still half of the 4U blank panel empty, so I got a CD4066, providing four voltage controlled on/off switches. I also found a common-cathode RGB LED which reminded me of the Razmasynth Super Warp Generator. This uses a two-pin RGB LED though and not the four-pin one I had, so I modified the circuit to accept three input signals for R, G and B separately, which are mixed together at the end.
I already drilled the front panel and just need to saw the holes for the pin headers and add some stand-off screws. So far everything seems to work fine when connected to the AE Modular’s bus though and it’s fun even just to patch the module by itself for interesting square waveforms and rhythms. Here’s a quick test (fourth panel to the right has a video):
I’ll hopefully finish everything by Tuesday and if I find the right transistors, I might also add some AND logic too. It’s so cool to go scavenger hunting in the leftover drawer and try to build something from the scraps
First, I made two square wave LFOs from a CD40106, following this Hackaday guide.
A question I have about this is wether I can leave the unused pins of the ICs floating like that. Seems to work fine like this too, but I’m not sure. I blew two of the ICs during the initial design process for some reason, but I might have just been careless with throwing other components into the mix.
Then I added a 10-step counter with clock input and carry pulse output from a CD4017, as well as six OR-wired sockets, according to Dieter Doepfer’s A-100 DIY Page schematic.
Of course there was still half of the 4U blank panel empty, so I got a CD4066, providing four voltage controlled on/off switches. I also found a common-cathode RGB LED which reminded me of the Razmasynth Super Warp Generator. This uses a two-pin RGB LED though and not the four-pin one I had, so I modified the circuit to accept three input signals for R, G and B separately, which are mixed together at the end.
I already drilled the front panel and just need to saw the holes for the pin headers and add some stand-off screws. So far everything seems to work fine when connected to the AE Modular’s bus though and it’s fun even just to patch the module by itself for interesting square waveforms and rhythms. Here’s a quick test (fourth panel to the right has a video):
http://instagr.am/p/BoW8Zq2C4H5
I’ll hopefully finish everything by Tuesday and if I find the right transistors, I might also add some AND logic too. It’s so cool to go scavenger hunting in the leftover drawer and try to build something from the scraps
