2 layers19.7 × 99.1 mm
Main pcb
Testbild-synth/HAGIWO_arduino_oscillator
4HP through hole version of the HAGIWO FM/additive/chord oscillator with mode switch and gain input.
40 parts57MIT
2 layers51 × 29 mm
Preamp simple
pgroon/simple-mic-preampPCB design for a simple preamp for contact microphones
- Size
- 51 × 29 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 16
- Pads
- 42
- Tracks, vias
- 57, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Nov 2025
- Updated
- 13 Nov 2025
Overview
Preamp simple is an open-source printed circuit board by pgroon, from the pgroon/simple-mic-preamp repository on GitHub. It is a 2-layer board of 51 × 29 mm with 13 parts on 16 nets, routed with 57 tracks and 0 vias.
It is built around the TL072CP. Its parts include 4 capacitors, 3 resistors and 1 IC. It belongs with the audio and music boards of this library.
Main components
1Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 54-00174 | preamp-parts:TENSILITY_54-00174_TRRS-socket | MIC IN, MIC OUT |
| 2 | 62k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D8.0mm_P2.50mm | C1 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 10uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C2 |
| 1 | 1uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C3 |
| 1 | 22uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C4 |
| 1 | BAT 9V | 01_Custom:WirePad_StrainRelief_AllCuLayersConnected | BT1 |
| 1 | TL072CP | preamp-parts:P8 | U1 |
Questions
How big is the Preamp simple PCB?
It measures 51 × 29 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Preamp simple use?
13 parts, built around the TL072CP. 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 Preamp simple KiCad files?
From the pgroon/simple-mic-preamp repository on GitHub, at the commit this page was made from: the board is preamp_simple.kicad_pcb and its schematic preamp_simple.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Preamp simple design in my own project?
Its repository states no licence, so its author keeps all rights: ask pgroon before reusing the design.
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