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NOTE : i_n_c_u_r is an extension circuit for my existing raspberry pi project r_e_c_u_r - it will only be useful to you if you already have build a r_e_c_u_r
disclaimer: this is a fun custom project, but dont forget there are other ways to getting serial and cv control over recur parameters. USB midi is supported in recur without any extra circuitry. other diy and commercial products exist that convert cv to midi, and serial to USB. in my opinion a general solution for cv-to-usb-midi applied to recur is more useful than a specific board that only works with recur
this project is fully open-source hardware - all the files required to build it are included in this repo for free. if you have the time and/or skill you can contribute back by collaborating on / testing new designs, improving these docs, making demo videos/other creative content etc. you can also support the project financially by donating directing, or purchasing through the web shop.
depending on whether you are going fully diy or buying an assembled and tested unit, some of the following guides will be relavent to you. the flow would be:
i try to source all the parts i can from either:
take a look at the full_bom for this project to see where i am sourcing each part from
go to the tayda quick order and in bottom corner choose add from file
select the file tayda_bom.csv in the BOM folder (you will have to download it first or clone this repo)
after importing select add to cart
NOTE: the minimum value for resistors is 10, so you may need to modify these values to add to cart (or if they are already modified here you will need to see the full_bom for actual part QTY)
OPTIONAL: it is a good idea to add some dip-ic sockets and 2.54pin headers/sockets to your tayda order if you dont have them around already
you can support this project by buying individual pcbs from the shop. if you would rather have pcbs fabricated from gerbers directly the file you need is here
add gerber file buttoni often use jlcpcb because they are reliable, cheap and give you an option of colours. remember though that the cheapest Chinese fab houses are not always the most ethical or environmently friendly - if you can afford it consider supporting local companies.
follow this link to view the interactive BOM
remember to heat pad first (2-3seconds), then add solder, then continue to heat (1-2seconds)
Checkout the web-comic soldering is easy for more soldering advice
start with the lowest to place components : resistors, diodes, ic's
next i would place the two headers since soldering from the top can be awkward with too many components - NOTE these need to be placed upside down! ,:
finally place the pots and jacks.
if you want RCA video out from the pi on this pcb a jumper needs to be run from J6 to the composite video out on the raspberry pi board. on pi0 this is a labeled pin, however on pi3 you will need to solder directly to the board. i used a header-cable, cut one side to be soldered. The pin on pi3 is marked as PP24.
[picture coming soon]
user_input folder in r_e_c_u_r's _SETTINGS_ tab and toggle ANALOG_INPUTuser_input folder in r_e_c_u_r's _SETTINGS_ tab and toggle MIDI_INPUT to serialfor more info on operating r_e_c_u_r see this guide
if you would like to contribute back to these projects in some way but dont know how the best thing (for now) would be to reach out to me directly ( tim@cyberboy666.com or @cyberboy666 on scanlines forum) - i will be happy to help
This circuit is distributed through UNDERSCORES – open video hardware label – visit underscores.shop for more info
The pcb was designed using KICAD
Everything from gerbers, cad files, panels and documentation is freely available online and distributed under CC-BY-SA / open-source licenses – help us contribute to the commons !
Ask any questions or start discussions related to this project on the scanlines.xyz forum – an online community space dedicated to diy av / electronic media art
You can contact me directly at tim (at) cyberboy666 (dot) com Please get in touch if you are interested in hosting a workshop !
Thanks to Signal Culture for giving me the time and space to explore. to Bastien Lavaud for circuit advice, always. To Ben Caldwell for project advice. To everyone who has or will contribute ♥♥♥
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