LM386-audio amplifier

safaripb·LM386-audio-amplifier-KiCAD·hardware/LM386_Audio_Amplifier.kicad_sch

LM386-audio amplifier

About the LM386-audio amplifier PCB

LM386-audio amplifier is an open source PCB design by safaripb, published on GitHub. It is a board, with 22 components from 16 distinct parts.

Other key parts include the LM386. By type, the board carries 7 capacitors, 4 test points, 4 resistors, 3 connectors, 1 IC and 1 switch.

It belongs with the audio designs in this gallery.

From the project

KiCAD Prototyping of a LM386 amplifier

This repository contains a compact mono audio amplifier designed around the LM386 and documented as a KiCad hardware portfolio project. The design accepts a 5-12 V input supply, mixes a stereo 3.5 mm audio input down to mono through 4.7 kOhm resistors, and feeds the amplifier through a 10 kOhm volume control.

The project includes KiCad source files, fabrication-ready Gerber outputs, plated and non-plated drill files, schematic/PCB screenshots, and bring-up documentation. The board has not yet been physically fabricated or hardware-tested, so no measured gain, noise, frequency response…

Main components on the LM386-audio amplifier

LM386-audio amplifier bill of materials (BOM)

22 components, 16 distinct parts.

Qty	Part	Footprint	Refs
1	LM386	DIP-8_W7.62mm	U1
1	AudioJack3	Jack_3.5mm_CUI_SJ1-3533NG_Horizontal	J1
2	Conn_01x02	TerminalBlock_Philmore_TB132_1x02_P5.00mm_Horizontal	J2, J3
1	10k	Potentiometer_Alps_RK09K_Single_Vertical	RV1
1	SW_SPDT	SW_Slide_SPDT_Straight_CK_OS102011MS2Q	SW1
4	TestPoint	TestPoint_THTPad_D2.0mm_Drill1.0mm	TP1, TP2, TP3, TP4
1	LED	LED_D3.0mm	D1
1	220uF	CP_Radial_D8.0mm_P3.50mm	C1
1	47nF	C_Disc_D5.0mm_W2.5mm_P5.00mm	C2
1	100n	C_Disc_D5.0mm_W2.5mm_P5.00mm	C3
1	100u	CP_Radial_D6.3mm_P2.50mm	C4
2	10uF	CP_Radial_D5.0mm_P2.00mm	C5, C6
1	100nF	C_Disc_D5.0mm_W2.5mm_P5.00mm	C7
2	4.7kΩ	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1, R2
1	10Ω	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R3
1	2.2kΩ	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R4

LM386-audio amplifier design files

The KiCad project lives in the safaripb/LM386-audio-amplifier-KiCAD repository on GitHub; these links point at the commit this page was built from.

Schematichardware/LM386_Audio_Amplifier.kicad_sch

LM386-audio amplifier: common questions

How many components are on the LM386-audio amplifier?

22 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the LM386-audio amplifier design files?

From the safaripb/LM386-audio-amplifier-KiCAD repository on GitHub, which has the schematic; the links under Design files point to each one.

Can I use the LM386-audio amplifier design in my own project?

The repository has no license, so all rights stay with safaripb. Use it as a reference, and ask the author before reusing the design.

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