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Mini-Amplifier

RetroStack·Mini-Amplifier·KiCAD/Mini_Amplifier_Speaker.kicad_pcb

Mini-Amplifier PCB layout, top view — open source board by RetroStack

About the Mini-Amplifier PCB

Mini-Amplifier is an open source PCB design by RetroStack, published on GitHub under the MIT license. It is a 2-layer board measuring 57 × 30 mm, with 23 components from 21 distinct parts.

Other key parts include the LM386. By type, the board carries 8 capacitors, 6 connectors, 6 resistors, 1 IC and 1 transistor.

It belongs with the audio and rf & radio designs in this gallery.

From the project

A replica of a common mini amplifier sold by Radio Shack

This project is a replica of the iconic Amplifier and Speaker, a popular accessory sold by Radio Shack in the late '70s and early '80s, commonly paired with the TRS-80 Model 1.

In the "Latest" folder, you'll find the most up-to-date design files, including:

- Gerber files suitable for popular online PCB manufacturers like PCBWay and JLCPCB. Most manufacturers should be fine with either. - A Bill of Materials (BOM) in both CSV and PDF formats. (Also, see the list below.) - The full schematics. - 3D Objects of Base, Lid, and Tab for 3D printing. - Labels of Schematic and Warning in SVG, AI…

Mini-Amplifier, from the project README
From the project README

Main components on the Mini-Amplifier

LM386

Mini-Amplifier bill of materials (BOM)

23 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM386
U1
1
NPN
Q1
1
Input
J1
1
Ext Spk
J2
1
Spk +
J3
1
Spk -
J4
1
GND
J5
1
+9V
J6
1
5k
RV1
2
4.7uF 25V
C1, C6
1
22uF 10V
C2
1
10uF 16V
C3
1
47uF 10V
C4
1
100uF 10V
C5
1
3.3nF
C7
1
33nF
C8
1
10
R1
2
10k
R2, R6
1
6.8k
R3
1
82k
R4
Show 1 more
QtyPartRefs
1
270
R5

Mini-Amplifier design files

The KiCad project lives in the RetroStack/Mini-Amplifier repository on GitHub; these links point at the commit this page was built from.

Mini-Amplifier: common questions

How big is the Mini-Amplifier PCB?

The Mini-Amplifier measures 57 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mini-Amplifier?

23 components, from 21 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Mini-Amplifier design files?

From the RetroStack/Mini-Amplifier repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Mini-Amplifier design in my own project?

Yes, under the terms of its MIT license, which RetroStack chose for the repository.

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