2 layers104 × 158 mm
2 layers40.8 × 103 mm
Wave Folder
soggybag/Wave-FolderYuSynth wavefolder reworked as a 4HP Eurorack module: BAV99 pairs, matched NPN VCA, split boards. KiCad project in WaveFolder/, panel in Front-Panel/.
- Size
- 40.8 × 103 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 61
- Pads
- 225
- Tracks, vias
- 546, 49
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Oct 2026
- Updated
- 17 Oct 2026
Overview
Wave Folder is an open-source printed circuit board by soggybag, from the soggybag/Wave-Folder repository on GitHub. It is a 2-layer board of 40.8 × 103 mm with 71 parts on 61 nets, routed with 546 tracks and 49 vias.
It is built around the TL072, BAV99 and DMMT3904W, with the MMBT3904 among its other parts. Its parts include 36 resistors, 12 diodes, 8 connectors, 4 capacitors and 2 ICs. It belongs with the audio and music boards of this library.
Main components
4
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
BAV99
SOT-231 Pair Series Connection 1.25V@150mA 100V 215mA 250mW 4A 4ns 500nA@80V SOT-23 Switching Diodes ROHSNexperiaSwitching Diodes
DMMT3904W
SC-70-6(SOT-363)-65℃~+150℃ 100 2 NPN 200mA 200mV 200mW 300MHz 40V 50nA 6V NPN SC-70-6(SOT-363) Bipolar (BJT) ROHSDiodes IncorporatedBipolar (BJT)MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
README
README.mdWave Folder (Eurorack 4HP)
YuSynth wavefolder reworked as a 4HP Eurorack module: BAV99 pairs, matched NPN VCA, split boards. KiCad project in Wave_Folder/, panel in Front-Panel/.
Status: PCB and fab files done; not ordered. YuSynth designs are shared for DIY use: ask before selling.
Product notes and ratings: ../Product Notes.md, ../Project Status.xlsx.
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 15k | Resistor_SMD:R_0805_2012Metric | R3, R4, R11, R20, R21, R22, R23, R24, R25, R26, R27 |
| 10 | BAV99 | Package_TO_SOT_SMD:SOT-23 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 7 | 100k | Resistor_SMD:R_0805_2012Metric | R1, R8, R9, R10, R14, R16, R17 |
| 2 | 10 | Resistor_SMD:R_0805_2012Metric | R35, R36 |
| 2 | 10 µF 25 V X5R | Capacitor_SMD:C_0805_2012Metric | C6, C7 |
| 2 | 100 nF 50 V X7R | Capacitor_SMD:C_0805_2012Metric | C2, C3 |
| 2 | 100k | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | CV_LEVEL1, RANGE1 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R6, R7 |
| 2 | 22k | Resistor_SMD:R_0805_2012Metric | R12, R13 |
| 2 | 33k | Resistor_SMD:R_0805_2012Metric | R5, R18 |
| 2 | 56k | Resistor_SMD:R_0805_2012Metric | R32, R33 |
| 2 | 5k6 | Resistor_SMD:R_0805_2012Metric | R29, R30 |
| 2 | Conn_01x07_Pin | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J7, J8 |
| 2 | Conn_01x07_Socket | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Vertical | J5, J6 |
| 2 | SS14 (40 V 1 A Schottky) | Diode_SMD:D_SMA | D11, D12 |
| 1 | 1K | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1 |
| 1 | 27k | Resistor_SMD:R_0805_2012Metric | R28 |
| 1 | 2k7 | Resistor_SMD:R_0805_2012Metric | R19 |
| 1 | 2×5 2.54 mm shrouded IDC box header | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J1 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric | R34 |
| 1 | 47k | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | SHAPE1 |
| 1 | 50K | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV2 |
| 1 | 680 | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | 68k | Resistor_SMD:R_0805_2012Metric | R15 |
| 1 | 6k8 | Resistor_SMD:R_0805_2012Metric | R31 |
| 1 | CV IN | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | DMMT3904W | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q1 |
| 1 | INPUT | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | OUTPUT | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | TL072 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | TL074 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
The 69 most common of 71 parts.
Similar boards
- 2 layers40.3 × 108.2 mm
- 4 layers100 × 100 mm
Amod c
gallicchio/AMOD-and-RFMOD
The tutorial's 2x12 adapter (/mudd/133electronics/icepi-zero-dac-adc/adapterboard/) with a 2 x 6 right-angle Pmod socket on a 15 mm extension of its right-hand end, so an Icepi Zero can drive AMOD-A's and RF-MOD's Pmod…
211 parts - 4 layers11.2 × 25.4 mm
- 2 layers52.1 × 45.1 mm
- 2 layers35 × 20 mm
- 2 layers50 × 200 mm
- 2 layers30 × 18 mm
Questions
How big is the Wave Folder PCB?
It measures 40.8 × 103 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Wave Folder use?
71 parts, built around the TL072, BAV99, DMMT3904W and MMBT3904. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Wave Folder KiCad files?
From the soggybag/Wave-Folder repository on GitHub, at the commit this page was made from: the board is Wave_Folder/Wave_Folder.kicad_pcb and its schematic Untitled/Untitled.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Wave Folder design in my own project?
Its repository states no licence, so its author keeps all rights: ask soggybag before reusing the design.