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2 layers50.8 × 25.4 mmXiegu MiniMic, the printed circuit board in 3D

A Small Microphone for the Xiegu G90, X5105 and X6100 Radios

Size
50.8 × 25.4 mm
Copper layers
2
Thickness
1.6 mm
Parts
22
Nets
11
Pads
50
Tracks, vias
45, 1
Pours
1
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
15 Nov 2022
Updated
18 Nov 2022

Overview

Xiegu MiniMic is an open-source printed circuit board by jzkmath, from the jzkmath/Xiegu-MiniMic repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 50.8 × 25.4 mm with 22 parts on 11 nets, routed with 45 tracks and 1 via.

It is built around the 08055A220JAT2A, 08055C104KAT4A and CRG0805F2K2, with the 08055C472K4T4A, UWT1C100MCL1GB and 0805YC105KAT2A among its other parts. Its parts include 10 capacitors, 2 resistors, 2 diodes, 1 connector and 1 switch. It belongs with the audio and music and radio and wireless boards of this library.

Main components

10

README

README.md

Xiegu-MiniMic

A Small Microphone for the Xiegu G90, X5105 and X6100 Radios. I have designed this to be assembled mostly by JLCPCB. (See below for instructions on how to order them)

After looking at the larger Microphone that comes with the radio, it appears to be a clone of the ICOM HM151 Hand Mic. Knowing this, I was able to use the service manual to create this PCB.

This is designed using KiCad Version 6.0.9

The Enclosure can be 3D Printed and requires 4 M2x20mm Socket Head Screws and 4 M2 Nuts. I used McMaster Carr Part numbers 91292A013 and 90591A111 for this project.

Version History:

Rev. A: Initial Design

Rev. B: Found that the EM6022P Microphone Element was wired backwards. Fixed it in this revision.

Mic Size Comparison

Enclosure Close up

PCB Render

PCB Assembly Instructions:

  1. Download this repository by clicking on "code" then downloading as a ZIP file. Extract the ZIP file.
  2. Go to https://jlcpcb.com/quote
  3. Click "Add Gerber File" upload the Xiegu-MiniMic-GERBER.zip file found in the GERBER folder.
  4. Adjust settings. The only ones you should change (if you want) is PCB Qty, PCB Color, and Surface Finish.
  • If you just want the PCB you may click "Save to Cart" and place your order.
  • If you want assembly, proceed to step 5.
  1. Scroll don and tick the slider to the right of "PCB Assembly"
  2. Leave it set to "Assemble Top Side" and click "Confirm"
  3. For the "BOM File" upload Xiegu MiniMic.csv in the ASSEMBLY folder.
  4. For the "CPL File" upload Xiegu MiniMic-top-pos.csv in the ASSEMBLY folder.
  5. For Usage, I recommend you set it to "Research/Education/DIY/Entertainment > DIY HS Code 902300" (You can really set it to whatever you want)
  6. Click "Next"
  7. Make sure the BOM is complete (except for the RJ45 connector)
  • If one of the parts are out of stock, you can substitute with a similar part.
  • For resistors and capacitors, the main thing to ensure is the value and the case is 0805 (except for C3)
  • C3 is an electrolytic capacitor. Specs needed: 10uF, at least 16V, Diameter: 4mm, Length: 5.4mm (SMD)
  • Zener Diodes are 9.1v, and have a SOD-123 package
  • Inductor L1 is 33uH and has a 1008 package size
  1. Once any substitutions are made, click "Next"
  2. Inspect the render to make sure the orientation is correct. C3 should have the plus line up and the diodes should have their negative on the right side, matching up with the silkscreen.
  3. Click "Add to Cart" then place your order.

You will likely need to order the RJ45 connector (54602-908LF) and microphone (EM6022P) from Digikey or Mouser and solder them yourself.

Parts

22
QtyValueFootprintReferences
4M2MountingHole:MountingHole_2.2mm_M2_PadH1, H2, H3, H4
322pFCapacitor_SMD:C_0805_2012MetricC4, C5, C6
2100nFCapacitor_SMD:C_0805_2012MetricC7, C10
22.2kResistor_SMD:R_0805_2012MetricR1, R2
24.7nFCapacitor_SMD:C_0805_2012MetricC8, C9
2MMSZ5239B-7-FDiode_SMD:D_SOD-123D1, D2
11-1825027-1Xiegu MiniMic:SW_1-1825027-1S1
110uFCapacitor_SMD:CP_Elec_4x5.4C3
11uFCapacitor_SMD:C_0805_2012MetricC2
133uHInductor_SMD:L_1008_2520MetricL1
1470pFCapacitor_SMD:C_0805_2012MetricC1
154602-908LFConnector_RJ:RJ45_Amphenol_54602-x08_HorizontalJ1
1EM6022PXiegu MiniMic:EM6022PMK1

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Questions

How big is the Xiegu MiniMic PCB?

It measures 50.8 × 25.4 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Xiegu MiniMic use?

22 parts, built around the 08055A220JAT2A, 08055C104KAT4A, CRG0805F2K2 and 08055C472K4T4A. 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 Xiegu MiniMic KiCad files?

From the jzkmath/Xiegu-MiniMic repository on GitHub, at the commit this page was made from: the board is Xiegu MiniMic.kicad_pcb and its schematic Xiegu MiniMic.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Xiegu MiniMic design in my own project?

Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).