Maddie MOD2 · Hardware
MOD2 DIY Assembly
Bill of materials and step-by-step build guide for the MOD2 board — Hagiwo's open 4 HP audio-rate hardware.
MOD2 is Hagiwo’s open 4 HP audio-rate hardware design — the sibling of MOD1, with a Seeed XIAO RP2350 in place of the Nano. Once it’s built, flash any of the MOD2 firmwares to give it a personality. This page covers the parts and the build.
Components
The list of electronic components is as follows:
| Part | Component |
|---|---|
| Potentiometer | TAYDA 100K Ohm linear taper potentiometer, spline shaft, PCB mount, 9 mm |
| 3.5 mm jack | PJ-301M |
| MCU | Seeed XIAO RP2350 |
| LED | 3 mm LED |
| Push switch | Tact switch 6×6 mm, 13 mm, through-hole, SPST-NO |
| Pin header | 2×8 pin, 2.54 mm, double-row pin header strip |
| Pin socket | 15-pin, 2.54 mm, single-row female pin header |
Assembly method
Boards are supplied with the surface-mount (SMD) parts already soldered, so assembly starts with the through-hole front-side parts.
1. Placement of front-side parts
Insert the variable resistors, tact switch, LED and 3.5 mm jacks (with the nuts removed) into the board. Don’t solder yet. The LED has a direction — insert it with the longer lead on the + side.
2. Installation of the front panel
Attach the front panel and tighten the nuts. When tightening, be careful not to damage the front panel.
3. Solder the front-side parts
Solder all parts.
- The claws of the six variable resistors do not require soldering.
- Cut the extra LED lead after soldering.
- Be careful not to let the soldering iron touch the resin pin socket.
4. Completed
Finally, press on the knobs, attach the Seeed XIAO RP2350, and you’re done.
Hardware design by Hagiwo. Translated and adapted for Maddie Synths.