Headpho
About the Headpho PCB
Headpho is an open source PCB design by fablabnk, published on GitHub. It is a 2-layer board measuring 20 × 106.7 mm, with 39 components from 17 distinct parts.
Other key parts include the NJM4556AV-TE1 and LME49720. By type, the board carries 14 capacitors, 14 resistors, 6 connectors and 4 ICs.
It belongs with the audio designs in this gallery.
From the project
A 4HP Eurorack headphone amp based on the popular Exits module
Footprint for NJM4556AV-TE1 can be found here: https://componentsearchengine.com/part-view/NJM4556AV-TE1/New%20Japan%20Radio
TODO: take power footprint out of stereo pot footprint (this overlap isn't good!) DONE: double check schematic against original TODO: Convert panel holes to NPTH to avoid maximum plated hole size warning (although we won't sent these to fab, so doesn't really matter)
Main components on the Headpho
Headpho bill of materials (BOM)
39 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | NJM4556AV-TE1 NJM4556AD | DIP-8_W7.62mm_Socket | IC1, IC2 |
| 2 | LME49720 | DIP-8_W7.62mm_Socket | U1, U2 |
| 1 | WQP-WQP518MA IN L Wenzhou QingPu Electronics Co | EighthInch_PJ398SM_3mmNPTH | J1 |
| 1 | WQP-WQP518MA IN R Wenzhou QingPu Electronics Co | EighthInch_PJ398SM_3mmNPTH | J2 |
| 1 | 1-1002FBV0T Eurorack_Power_10pin_Unshrouded TAD | IDC-Header_2x05_P2.54mm_Vertical_Euro_Power_Striped_ThickerText | J3 |
| 1 | WQP-WQP518MA LINE OUT L Wenzhou QingPu Electronics Co | EighthInch_PJ398SM_3mmNPTH | J4 |
| 1 | WQP-WQP518MA OUT LR Wenzhou QingPu Electronics Co | EighthInch_Stereo_PJ366ST_NPTH | J5 |
| 1 | WQP-WQP518MA LINE OUT R Wenzhou QingPu Electronics Co | EighthInch_PJ398SM_3mmNPTH | J6 |
| 1 | 9M2V5BNB-D-15F-B50K-19WE 9mm_Dual_50k_DShaft_DualRow Top-Up | Dual_9mm_Potentiometer_50K_RK1114GH | POT1 |
| 2 | 22P 22uF | CP_Radial_D4.0mm_P2.00mm | C1, C2 |
| 8 | 100N 100n | C_Disc_D3.0mm_W1.6mm_P2.50mm | C3, C4, C7, C8, C9, C10, C13, C14 |
| 2 | 22U 100n | C_Disc_D3.0mm_W1.6mm_P2.50mm | C5, C6 |
| 2 | 100N 22p | C_Disc_D3.0mm_W1.6mm_P2.50mm | C11, C12 |
| 6 | 100K 100k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R1, R2, R3, R4, R5, R6 |
| 2 | 100K 1k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R7, R8 |
| 2 | 100k | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R9, R10 |
| 4 | 1Ω | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R11, R12, R13, R14 |
Headpho design files
The KiCad project lives in the fablabnk/HeadPho repository on GitHub; these links point at the commit this page was built from.
- LayoutHeadpho.kicad_pcb
- SchematicHeadpho.kicad_sch
- BOMbom.csv
Headpho: common questions
How big is the Headpho PCB?
The Headpho measures 20 × 106.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Headpho?
39 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Headpho design files?
From the fablabnk/HeadPho repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Headpho design in my own project?
The repository has no license, so all rights stay with fablabnk. Use it as a reference, and ask the author before reusing the design.
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