Lm386-amplifier
About the Lm386-amplifier PCB
Lm386-amplifier is an open source PCB design by Acrop0liX, published on GitHub. It is a 2-layer board measuring 80 × 60 mm, with 9 components from 9 distinct parts.
Other key parts include the LM386. By type, the board carries 3 capacitors, 2 connectors, 2 resistors, 1 IC and 1 speaker.
It belongs with the audio designs in this gallery.
From the project
LM386 Amplifier with 20 gain
A simple audio amplifier circuit designed in KiCad 10 as a beginner PCB design project.
The LM386 is a low-voltage audio power amplifier designed for consumer applications. This circuit runs at a fixed gain of 20 (26dB) and can drive an 8Ω speaker with up to 325mW of power from a 9V supply. The input stage includes a volume control potentiometer, and the output features a zobel network (10Ω resistor and 50nF capacitor) for stability and a 250µF DC-blocking capacitor for speaker protection.
Main components on the Lm386-amplifier
Lm386-amplifier bill of materials (BOM)
9 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM386 | DIP-8_W7.62mm | U1 |
| 1 | AudioJack2 | Jack_3.5mm_CUI_SJ1-3513N_Horizontal | J2 |
| 1 | Barrel_Jack_Switch | BarrelJack_Horizontal | J3 |
| 1 | Speaker | PhoenixContact_MC_1,5_2-G-3.5_1x02_P3.50mm_Horizontal | LS1 |
| 1 | 250µF | CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 50nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | 10µF | CP_Radial_D5.0mm_P2.50mm | C3 |
| 1 | 10K | Potentiometer_Alps_RK09K_Single_Vertical | R1 |
| 1 | 10 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
Lm386-amplifier design files
The KiCad project lives in the Acrop0liX/lm386-amplifier repository on GitHub; these links point at the commit this page was built from.
- LayoutLM386_Amp.kicad_pcb
- SchematicLM386_Amp.kicad_sch
Lm386-amplifier: common questions
How big is the Lm386-amplifier PCB?
The Lm386-amplifier measures 80 × 60 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Lm386-amplifier?
9 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Lm386-amplifier design files?
From the Acrop0liX/lm386-amplifier repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Lm386-amplifier design in my own project?
The repository has no license, so all rights stay with Acrop0liX. Use it as a reference, and ask the author before reusing the design.
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