HardLabs

Mic switch

karlcswanson·producer-mic·pcb/mic switch.kicad_pcb

Mic switch PCB layout, top view — open source board by karlcswanson

About the Mic switch PCB

Mic switch is an open source PCB design by karlcswanson, published on GitHub under the MIT license. It is a 2-layer board measuring 41.3 × 15.9 mm, with 8 components from 7 distinct parts.

By type, the board carries 3 resistors, 2 capacitors, 1 module, 1 connector and 1 switch.

It belongs with the iot & wireless and audio designs in this gallery.

From the project

Custom PTT mic for Shure wireless systems

This mic was created to meet a unique need for a push-to-talk mic for Shure wireless systems. In a live environment with high standards and attention to detail, they did not want the Executive Producer stand out with a comm headset and pack. They opted to go with a more covert IFB based solution.

For many years, a custom Countryman B3 filled this need. It was wired into two way radio surveillance kit. While simple, this design was fragile, difficult to repair, and caused pops when the mic was turned on and off. So I decided to make a microphone that was difficult to repair but at least did…

Mic switch, from the project README
From the project README

Mic switch bill of materials (BOM)

8 components, 7 distinct parts.

QtyPartRefs
1
SPH6611LR5H-1
M1
1
Conn_01x03
J1
1
SW_Push_SPDT
SW1
1
0.12uF
C1
1
150pF
C2
2
20k
R1, R3
1
100k
R2

Mic switch design files

The KiCad project lives in the karlcswanson/producer-mic repository on GitHub; these links point at the commit this page was built from.

Mic switch: common questions

How big is the Mic switch PCB?

The Mic switch measures 41.3 × 15.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mic switch?

8 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mic switch design files?

From the karlcswanson/producer-mic repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Mic switch design in my own project?

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

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