Eurorack Wavefolder Module
Eurorack Wavefolder Module is an open source PCB design by Len42: a 2-layer, 47.7 × 83 mm board with 59 components (24 distinct parts). It is built around the TL074, TL072. Filed under audio.
Eurorack synthesizer module designs
The amount of folding is controlled by the level of the input signal which is adjusted by an attenuator pot on the input. There are no CV inputs, but CV control of the folding can be done by running the input signal through a VCA.
The circuit design is based on Ken Stone's Simple Wave Folder and yusynth's Metalizer.
PCB layouts are provided in KiCad and gerber formats. A PCB layout for a drilled front panel (with no labels) is also included.
Built around
Parts list
59 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL074 Texas Instruments | DIP-14_W7.62mm | U1 |
| 1 | TL072 Texas Instruments | DIP-8_W7.62mm | U2 |
| 4 | 2N3906 ON Semiconductor / Fairchild | TO-92_Inline_Wide | Q1, Q3, Q5, Q7 |
| 4 | 2N3904 Central Semiconductor | TO-92_Inline_Wide | Q2, Q4, Q6, Q8 |
| 4 | WQP-PJ398 QingPu / Thonk | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J1, J2, J3, J4 |
| 1 | CONN_EURORACK_10 Conn_Eurorack_10 Wurth Elektronik | IDC-Header-Eurorack-10-TH | J101 |
| 1 | Conn_Front | PinSocket_1x09_P2.54mm_Vertical | J102 |
| 1 | Conn_Back | PinHeader_1x09_P2.54mm_Horizontal | J103 |
| 2 | 100K Alpha | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2 |
| 2 | 680N KEMET | C_Rect_L7.2mm_W4.5mm_P5.00mm | C1, C2 |
| 2 | 10U Panasonic | C_Radial_D5.0mm_H5.0mm_P2.50mm | C3, C4 |
| 2 | 10U Panasonic | CP_Radial_D5.0mm_P2.50mm | C101, C102 |
| 4 | 100N TDK | C_Disc_D5.0mm_W2.5mm_P2.50mm | C103, C104, C105, C106 |
| 2 | 499K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R16 |
| 4 | 100K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R15, R17, R30 |
| 2 | 18K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R18 |
| 7 | 15K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R5, R10, R11, R19, R25, R26 |
| 4 | 10K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R12, R21, R27 |
| 2 | 120K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R22 |
| 2 | 27K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R8, R23 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 68K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R24 |
| 2 | 200K YAGEO | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13, R28 |
| 2 | 1K Vishay / Dale | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R14, R29 |
| 1 | 15K YAGEO | SB_Gen_1 | R20 |
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