I breadboarded a slightly adapted version of this design this weekend, and just this moment tested it. I get velocity output, but I have made a mistake in the note output, but it is a great circuit. More the better that I picked up a midi keyboard controller (ESI KeyControl49) for €10 at the local flea market two weeks ago. Can't wait to get a board designed...and then some VCO's and some VCF's and some ....... . Excellent videos Rich. Keep it up!
@VanBroicz
3 жыл бұрын
That module looks really nice !
@Abossow77
3 жыл бұрын
This is great! I am designing One myself , But i'm also trying to add in outputs for the drum pads and some of the Knobs on the keyboard ! (still need to add blinky LEDs everywhere )
@consbuteri411
2 жыл бұрын
Congratulations on your module, very well built. Do you think I could adapt it to the Eurorack format, possibly using the same PCB?
@analog_output
2 жыл бұрын
It certainly could be done in Eurorack with no changes to the schematic. But the PCBs would have to be redesigned; my main PCB is 138 mm by 46 mm. It has a fair amount of space between components though, so squeezing it down to Eurorack size might not be that bad. In the worst case you could split it between two boards and sandwich them.
@-______-______-
4 ай бұрын
Awesome design. Thanks for sharing! I went off a very similar schematic to yours but it uses a SFH618A-4 optocoupler instead of the sn137. I'm powered off 9V. I'm RX light blinks with note on info, but I'm getting no voltage change readings on any CV output. I'm using elkayem's exact code. I'm using benjiao modular schematic I'm really confused. Any suggestions? Thanks
@MJLouer
Жыл бұрын
Hi again. A quick question regarding the NOTE_SF statement in de code. I saw a substituted 'f' behind the 47.069 value. Is that correct? And i kindly want to ask you which lines of code to adjust when i only need 61 notes instead if 88. Thanks in advance for your help.
@d42kn355
3 жыл бұрын
reminds me i need to build mine lol - gotta order some arduinos!
@MJLouer
Жыл бұрын
Hi Rich Holmes. First of all thumbs up for your video regarding this module. Today i build it and it worked right away. The schematic is not that hard to follow 😁 but still its possible that issues arise to solve. I have one question regarding the Arduino. Besides the +5v on the 5v pin, why is there the need to power it with +12v on pin30 (vin)? At the same time? According to the datasheet the maximum power on that pin is +12v and more voltage could cause harm (regulator hot) so i rather not use the maximum voltage. Since the other chips (opto, and dac's) are running on 5 volts i desided to only connect 5volts to the 5volts pin and seems to work fine. Could you please advice which voltages i can use best in terms of stabilty etc. Thanks in advance for your reply. Keep up the good work. Kind regards Marty
@analog_output
Жыл бұрын
The Nano is powered only by +12 V on the VIN pin. The +5 V pin is a power output pin (in this configuration), not input - in my system (Kosmo format) there is no +5 V bus, and no +5 V regulator on this PCB, just the regulator on the Nano board which is powered by +12 V. I've never had a problem with running a Nano on +12 V. That said, if you have a regulated +5 V bus or if you add an external +5 V regulator to the board that can supply enough current for the Nano and the rest of the circuit, you could connect that to the +5 V Nano pin and connect nothing to the VIN pin. In that configuration the +5 V pin is indeed a power input, and the on board regulator is not used.
@MJLouer
Жыл бұрын
@@analog_output hi, thanks for your quick reply and advice. I am gonna try this later today. Thanks and have a nice day
@MJLouer
Жыл бұрын
The LM7805 regulator looks more sturdy to me than the tiny regulator on the Nano. Just a level of protection i guess.
@MJLouer
Жыл бұрын
May i kindly ask you once more for your help. I dont need 88 keys, but 64 instead. Which lines in the code do i need to adjust? And/or how to calculate? Thanks again for helping me out😊
@davidjohnston5329
2 жыл бұрын
Rich, I have a question for you. When I open your project in Kicad I see the two boards in the PCB layout, but for some reason I cannot see the traces on the main board, just the top and bottom zone outlines. I know this is more of a Kicad question, but as this is your design and I am still learning I would hope you could tell me how to display the traces on the main board. The traces on the 'Jacks' board show up fine.
@analog_output
2 жыл бұрын
That PCB file was wrong, somehow those tracks had gotten deleted. I've reverted the file to the previous version. Can't guarantee it's identical to what was used to produce the Gerbers, though. The Gerbers do have the tracks. Sorry about that and thanks for letting me know.
@davidjohnston5329
2 жыл бұрын
@@analog_output Thanks Rich! That makes all the difference. I did see that the gerbers were ok, I just thought that my kicad was playing up, or that you had hidden the tracks with some setting....
@sivoltage
4 ай бұрын
Will this work if I use a usb to midi cable from Ableton?
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