Board
About the Board
Board is an open source PCB design by wntrblm, published on GitHub under the CC-BY-SA-4.0 license. It is a 4-layer board measuring 30 × 53.5 mm, with 50 components from 26 distinct parts.
Other key parts include the MAX97220C, MAX97220D, 74LVC1G04GW, SN74LVC1G04DBV, TL074CPW and MAX9717B, MAX9717C, MAX9717D. By type, the board carries 19 capacitors, 14 resistors, 4 ICs, 4 connectors, 4 diodes and 2 inductors.
It belongs with the audio designs in this gallery.
From the project
A beautiful stereo headphone amplifier and a delightfully lo-fi speaker
Speak to Me is a high quality headphone amplifier and low quality speaker monitor for Eurorack.
More details available at https://winterbloom.com/store/speak-to-me
This repository contains the hardware design files and user guide for Speak to Me:
- hardware/ contains the hardware design files for the mainboard, headphone jack breakout, and blank panel. These are all created using KiCAD. - userguide/** contains the user's guide source files. These are written in Markdown and published using MkDocs.
Main components on the Board
Board bill of materials (BOM)
50 components, 26 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MAX97220C, MAX97220D MAX97220C | TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm_ThermalVias | U1 |
| 1 | 74LVC1G04GW, SN74LVC1G04DBV 74LVC1G04 | SOT-23-5 | U2 |
| 1 | TL074CPW TL074 | TSSOP-14_4.4x5mm_P0.65mm | U3 |
| 1 | MAX9717B, MAX9717C, MAX9717D MAX9717x | TDFN-8-1EP_MAX9717xET | U4 |
| 1 | 302-S101 Power | Eurorack_Power_2x5_Shrouded_Lock_LongPads | J1 |
| 1 | WQP-WQP518MA Left | AudioJack_WQP518MA_Compact_S_LongPads | J3 |
| 1 | WQP-WQP518MA Right | AudioJack_WQP518MA_Compact_S_LongPads | J4 |
| 1 | Headphones | Connector_FFC_1x05_P2.54mm_Vertical_LongPads | J6 |
| 1 | B2B-XH-A Speaker | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | LS1 |
| 1 | V78E05-500-SMT | Converter_DCDC_CUI_V78E05-500-SMT | PS1 |
| 1 | Thonk 9mm B10k DUAL GANG Volume | Potentiometer_Alpha_RD902F-40-00D_Dual_Vertical | RV1 |
| 2 | APT2012VBC/D BLUE | LED_0805_Kingbright_APT2012 | D1, D4 |
| 2 | PMEG4005EH,115 30V | D_SOD-123+SOD-123F | D2, D3 |
| 2 | BLM18BD121SN1D 1k @ 100MHz | L_0603_HandSolder | FB1, FB2 |
| 9 | 1u | C_0603_HandSolder | C1, C3, C6, C7, C8, C9, C12, C15 +1 |
| 2 | 22u | C_0805_HandSolder | C2, C4 |
| 5 | 100n | C_0603_HandSolder | C5, C10, C11, C14, C16 |
| 1 | 10u | C_0603_HandSolder | C13 |
| 2 | 22p | C_0603_HandSolder | C18, C19 |
| 2 | RT0603FRE071KL 100k | R_0603_HandSolder | R1, R5 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | RT0603FRE071KL 30k | R_0603_HandSolder | R2, R6 |
| 2 | RT0603FRE071KL 27R | R_0603_HandSolder | R3, R4 |
| 2 | 10k | R_0603_HandSolder | R7, R9 |
| 3 | RT0603FRE071KL 1k | R_0603_HandSolder | R8, R10, R11 |
| 1 | RT0603FRE071KL 10k | R_0603_HandSolder | R12 |
| 2 | 100k | R_0603_HandSolder | R14, R15 |
Board design files
The KiCad project lives in the wntrblm/Speak_to_Me repository on GitHub; these links point at the commit this page was built from.
- Layouthardware/board/board.kicad_pcb
- Schematichardware/board/board.kicad_sch
Board: common questions
How big is the Board?
The Board measures 30 × 53.5 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Board?
50 components, from 26 distinct parts. The full bill of materials is listed on this page.
Where can I download the Board design files?
From the wntrblm/Speak_to_Me repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Board design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which wntrblm chose for the repository.
More boards in Speak_to_Me
Similar boards
KLOR
GEIGEIGEIST
160.2 × 118.3 mm79 parts2LGPL-3.01.2k
ButtonsLEDs
shanteacontrols
390 × 37 mm82 parts2LApache-2.0956
USB
52 × 12.6 mm6 parts2LApache-2.0956
Pots
390 × 93 mm75 parts2LApache-2.0956
PicoGUS Hand386
polpo
29.2 × 75.2 mm43 parts4LGPL-2.0800
Snark barker
schlae
231.1 × 106.7 mm193 parts2LNo license687