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218r Retrigger Mod

triglav-modular·218r_Retrigger_Mod

218r Retrigger Mod PCB layout, top view — open source board by triglav-modular

About the 218r Retrigger Mod PCB

218r Retrigger Mod is an open source PCB design by triglav-modular, published on GitHub under the Unlicense license. It is a 2-layer board measuring 52.6 × 39.9 mm, with 23 components from 10 distinct parts.

Other key parts include the TL074 and TL071. By type, the board carries 13 resistors, 4 diodes, 3 capacitors, 2 ICs and 1 connector.

It belongs with the audio designs in this gallery.

From the project

This is a small add-on PCB that allows for new triggers to be sent from the 218r on each consecutive note without lifting a finger.

This is a small add-on PCB that allows for new triggers to be sent from the 218r on each consecutive note without lifting a finger. It converts the changes in the v/oct output into triggers and adds them to the pulse output.

There's no need to change any components on the 218r. The "key" and "pulse" inputs just go to the pads above their respective banana jacks. "out" goes directly to the pulse out bananas. Use a bolt standoff to install it above the STM32.

Main components on the 218r Retrigger Mod

TL074TL071

218r Retrigger Mod bill of materials (BOM)

23 components, 10 distinct parts.

QtyPartRefs
1
TL074
U1
1
TL071
U2
1
Conn_01x06_Female
J1
4
1N5818
D1, D2, D3, D4
1
220n
C1
2
100n
C2, C3
5
1K
R1, R2, R5, R8, R12
6
10K
R3, R6, R7, R10, R11, R13
1
390K
R4
1
20K
R9

218r Retrigger Mod design files

The KiCad project lives in the triglav-modular/218r_Retrigger_Mod repository on GitHub; these links point at the commit this page was built from.

218r Retrigger Mod: common questions

How big is the 218r Retrigger Mod PCB?

The 218r Retrigger Mod measures 52.6 × 39.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 218r Retrigger Mod?

23 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the 218r Retrigger Mod design files?

From the triglav-modular/218r_Retrigger_Mod repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 218r Retrigger Mod design in my own project?

Yes, under the terms of its Unlicense license, which triglav-modular chose for the repository.

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