2 layers101.5 × 83 mm
2 layers71.1 × 72.4 mm
Modulamp
PaoloM/ModulampA modular concept for a streaming + amplifier box
- Size
- 71.1 × 72.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 27
- Pads
- 73
- Tracks, vias
- 177, 4
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 17 Dec 2021
- Updated
- 25 Aug 2025
Overview
Modulamp is an open-source printed circuit board by PaoloM, from the PaoloM/Modulamp repository on GitHub, published under the MIT licence. It is a 2-layer board of 71.1 × 72.4 mm with 25 parts on 27 nets, routed with 177 tracks and 4 vias.
It is built around the 2N2222A. Its parts include 6 connectors, 4 switches, 3 resistors, 3 diodes and 3 transistors.
Main components
1README
README.mdModulamp
A modular concept for a streaming + amplifier box.
BOM
- Chassis (including transparent window)
- 2x Knobs for volume and mode
- 4x Speaker posts
- 4x RCA inputs
- Raspberry Pi (3B+ or better)
- HifiBerry DAC+ DSP
- Wemos D1 mini
- 5" DSI display
- 0.98" OLED display
- 2x LM3914 bar graph drivers
- 2x 10 segments LED bar graph displays
- 3x 5v relays
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3 |
| 3 | 1k | AXIAL-0.3 | R1, R2, R3 |
| 3 | 2N2222A | TO-92 | Q1, Q2, Q3 |
| 1 | +5v | JST-2-PTH | J6 |
| 1 | CONTROL | JST-4-PTH-VERT | J5 |
| 1 | LINE 1 | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | LEFT |
| 1 | LINE 1 RIGHT | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | RIGHT |
| 1 | LINE 2 | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K4 |
| 1 | LINE 2 RIGHT | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K3 |
| 1 | LINE IN 1 | JST-3-PTH-VERT | J1 |
| 1 | LINE IN 2 | JST-3-PTH-VERT | J2 |
| 1 | OUT | JST-3-PTH-VERT | J4 |
| 1 | STREAM | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K6 |
| 1 | STREAM | JST-3-PTH-VERT | J3 |
| 1 | STREAM RIGHT | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K5 |
The 21 most common of 25 parts.
Questions
How big is the Modulamp PCB?
It measures 71.1 × 72.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Modulamp use?
25 parts, built around the 2N2222A. 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 Modulamp KiCad files?
From the PaoloM/Modulamp repository on GitHub, at the commit this page was made from: the board is schematics/ModulAmp/ModulAmp.kicad_pcb and its schematic schematics/ModulAmp/ModulAmp - Amplifier.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Modulamp design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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