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Panel

borderColor	#000000
bgColor	#f0f0f0
titleColor	#FFFFFF
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title	Project

Projecttitel: DINSYNC RE-303

Status:
Status
colour Green
title done

Startdate: 2016

Duedate: 09/2018

last update : 02/2023

Manufacture link: http://privat.bahnhof.se/wb447909/dinsync/re-303/

Forum : http://23.235.199.139/~re303c5/forum/

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MOUSER BOM project card: https://www.mouser.at/ProjectManager/ProjectDetail.aspx?AccessID=0324e99177

plus tactiles: 688-SKQEAA

Info

title	when you use the PIXIE or Sonic Potions CPU you dont need following parts

ift(y): yellow coil for the original cpu clock
ic2: cd4556B decoder/multiplexer
ic3, ic4, ic5: cmos ram
d4D4: 1n4148
r6R6: 33k
r7R7: 100k
r23R23: 22k
r39R39, r40R40, r41R41, r44R44: 3.3k
c12C12: 0.01uf film
c57C57: 100uf / 25v electrolytic
q4Q4: 2sc536f/2sc945p

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Buildguide v1.2

(source: https://shop.re-303.com/build-it/)

View file

name	RE-303v1.2BUILDGUIDE.pdf
height	250

Issue/Help

ID	Issue	Issue/Mod Description and fix
1	Gate	in case you hear the gate signal - attack clicks - you can try to connect a 100nF polar cap** between GND and Trigger. Measure with an scope to find the best value - maybe you need a bigger value 220-470nf

Pixie CPU (the better Version)

Shop:

https://shop.re-303.com/product/pixie-powered-re-cpu/

"The Pixiepowered RE-CPU is a D650C emulator, which will allow you to run original maskrom firmware from original Roland(tm) machines."

Firmware and more:

https://github.com/sunflowr/recpu

http://www.d650.cc

FW manual 1.4.3

recpu_manual.1.4.3.pdf

Firmware Installation (on your own risk)

turn on and send 303.sysx with sysex librian tool
turn off and on again
send the boot loader sysex (1.30 version)
turn off
turn on while hold Step1 (all lets flashes like night rider mode)(some older boot loaders don't have the night rider mode)
now send the REEMU 1.3.0 sysex
machine restarts byself in 1.3.0 mode
turn off and on the 303
send the 303 sysx (optional)
reload the boot loader 1.4.3 in boot loader mode (hold step1) and upload the REEMU 1.4.3 sysex

Sonicpotions CPU: (deprecated ) pls. use the Pixie CPU

Julian from Sonic Potions developed a CPU for the RE303, this CPU is also an replacement for TB-303

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you can also use a Bassbot TT-303 case (the first 303 style case)

Buildguide v1.2

Modifications:

http://www.ladyada.net/make/x0xb0x/mods.html

Potentiometer Modification:

Available in my shop: (shipping starts end of June 2020)

(source: https://shopwww.re-303diysynth.comde/buildpcbs-itpanels/)

View file

name	RE-303v1.2BUILDGUIDE.pdf
height	250

Case Assembly guide

RE-303_case_assembly_guide.pdf

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re-303-pot-adapter.html

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no wobbling potentiometers anymore !!!

ask me if you need/want this solution, i left some pcbs..

you also need for the Midi Jacks an adapter.

BOM:

you need one of this Stereo Pot: (VR4 in the 303)

VR4 B50K Stereo !! (linear stereo)

VR2, VR7 = 50KB (lin)

VR3, VR5 =50KA (log)

VR6 = 1MA (log)

in total 6 potentiometers

https://www.thonk.co.uk/shop/alpha-9mm-pots-vertical-t18/

and you need:

pinstripes as shown above in my pictures.

2x 3.5mm (1/8inch) stereo jacks Lumberg KLB-4 which is available worldwide in hundreds of shops - its a quality part.

2x Adapter for the Midi holes to use the 3.5mm jacks - ONLY if you use the RE-303 Aluminum case - this are included with the PCB order in my shop !

2x 3.5mm (1/8 inch) plug to MIDI Cable - thonk or make your own.. https://www.thonk.co.uk/shop/alm-midi-trs-cable/ or DIY: NYS322 + 172-7435-E (mouser) you also need for the Midi Jacks an adapter.

update 01/2020: ground the MIDI IN port too, that's needed because the acrylic's adapter to the stereo 3.5mm jacks are isolatedImage Removed

Image Removedin case you use silver knobs: they are metalized and make grounding issues, you have to remove from the bottom the paint with a cutter knife.(easy)

the blue cable connects ground from MIDI out to the MIDI IN jack.

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