2 layers210.1 × 69.6 mm
2 layers45.1 × 101 mm
LabEA1
Danmuse/Lab_EA1_FRBA2This project covers the design and verification of single-stage amplifier circuits using bipolar and field-effect transistors.
- Size
- 45.1 × 101 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 81
- Nets
- 22
- Pads
- 162
- Tracks, vias
- 773, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 7 Apr 2026
- Updated
- 2 May 2026
Overview
LabEA1 is an open-source printed circuit board by Danmuse, from the Danmuse/Lab_EA1_FRBA repository on GitHub. It is a 2-layer board of 45.1 × 101 mm with 81 parts on 22 nets, routed with 773 tracks and 0 vias.
It is built around the SMAJ12A. Its parts include 39 connectors, 9 capacitors and 3 diodes. It belongs with the audio and music boards of this library.
Main components
1README
README.md📕️ Overview
The Single-stage amplifiers project involves the design, simulation, and experimental validation of single-stage amplifier circuits using bipolar junction transistors (BJTs) and field-effect transistors (FETs). The main objective is to compare theoretical small-signal and biasing calculations with actual laboratory measurements.
🔌️ Hardware & Setup
Electronic components
-
✶ SMAJ12A: TVS Diodes for input overvoltage protection.
✶ RV1 - RV12: 100kΩ Potentiometers for bias and load adjustment.
✶ C1 - C9: 1µF Coupling and bypass capacitors (Optional).
✶ JP1 - JP12: Solder jumpers for circuit configuration.
✶ J11, J24, J37: 3-pin headers for BJT/FET transistor swapping.
✶ J13, J26, J39: BNC/SMA Connectors for signal output (COLLECTOR, EMITTER, BASE).
✶ Screw Terminals: Input connectors for power supply (VCC/GND) and signal source.
- Hardware installations and cabinet design.
20 MH - Development board (Schematic and PCB).
16 MH - Circuit simulations with LTSpice.
0 MH
📚️ Documentation & Doxygen
- Comprehensive and extensive project report.
0 MH - Illustrations of the experience and trials.
0 MH - Load component datasheet.
0 MH
[!TIP] This section showcases the transition from theoretical design to physical implementation.
| Schematic circuit | PCB (TOP view) | PCB (BOTTOM view) + Layout |
 |  |  |
Parts
81| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | Conn_01x01_Socket | 5006:5006 | J3, J10, J16, J17, J18, J19, J20, J21, J22, J23, J29, J30, J31, J32, J33, J34 +8 |
| 12 | 100k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8, RV9, RV10, RV11, RV12 |
| 12 | SolderJumper_2_Open | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9, JP10, JP11, JP12 |
| 9 | 1u | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8, C9 |
| 6 | , , , , , | ||
| 6 | Conn_Coaxial | Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal | J2, J13, J15, J26, J28, J39 |
| 6 | Screw_Terminal_01x03 | TBC05_03_0_1_G_G:1725669 | J11, J12, J24, J25, J37, J38 |
| 3 | SMAJ12A | Diode_SMD:D_SMA | D1, D2, D3 |
| 3 | Screw_Terminal_01x02 | TBC05_02_0_1_G_G:1725656 | J1, J14, J27 |
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Questions
How big is the LabEA1 PCB?
It measures 45.1 × 101 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LabEA1 use?
81 parts, built around the SMAJ12A. 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 LabEA1 KiCad files?
From the Danmuse/Lab_EA1_FRBA repository on GitHub, at the commit this page was made from: the board is PCB Design/LabEA1/LabEA1.kicad_pcb and its schematic PCB Design/LabEA1/LabEA1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LabEA1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Danmuse before reusing the design.