2 layers152 × 88 mm
RFBitBangSMT
profdc9/RFBitBanger
A QRP digital transceiver created from readily available parts for off-the-grid maintenance
271 parts222
2 layers45 × 40 mm
3ch amp
pvar/pcb_3ch_mini_amp- Size
- 45 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 29
- Nets
- 20
- Pads
- 63
- Tracks, vias
- 62, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 15 Aug 2025
- Updated
- 15 Aug 2025
Overview
3ch amp is an open-source printed circuit board by pvar, from the pvar/pcb_3ch_mini_amp repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 45 × 40 mm with 29 parts on 20 nets, routed with 62 tracks and 0 vias.
It is built around the LM386. Its parts include 10 capacitors, 5 resistors, 5 connectors, 1 IC and 1 switch. It belongs with the audio and music boards of this library.
Main components
1Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3 |
| 3 | 100K | fx_synth_parts:potentiometer_fx_connector | RV1, RV2, RV3 |
| 3 | 1uF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C1, C2, C3 |
| 2 | 100n | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C4, C9 |
| 2 | 10uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C5, C6 |
| 1 | 10R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R5 |
| 1 | 220uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C8 |
| 1 | 330uF | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C10 |
| 1 | 47n | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C7 |
| 1 | BATTERY | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | INPUT1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | INPUT2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | INPUT3 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | LM386 | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | SPK | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | SWITCH | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | SW2 |
The 25 most common of 29 parts.
Questions
How big is the 3ch amp PCB?
It measures 45 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 3ch amp use?
29 parts, built around the LM386. 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 3ch amp KiCad files?
From the pvar/pcb_3ch_mini_amp repository on GitHub, at the commit this page was made from: the board is 3ch-amp.kicad_pcb and its schematic 3ch-amp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 3ch amp design in my own project?
Its repository publishes it under the GPL-3.0 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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