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Main-Board

open-headset-interconnect-standard·radio-adapter·v2/Main-Board/Main-Board.kicad_pcb

Main-Board layout, top view — open source board by open-headset-interconnect-standard

About the Main-Board

Main-Board is an open source PCB design by open-headset-interconnect-standard, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 100 × 84 mm, with 146 components from 40 distinct parts.

Other key parts include the LM78M05_TO252, LP5907MFX-2.5, LM4808, NJM4580 and LTV-217-B-G. By type, the board carries 60 capacitors, 29 inductors, 29 resistors, 9 connectors, 5 ICs and 4 test points.

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

From the project

An open-source OHIS Radio Adapter.

As of 2024-07-17, this is a Work In Progress.

1. Design a set of circuits that can be used to build OHIS compliant radio adapters. 2. Designs should be as simple as possible, but no simpler. 3. When laying out boards, keep as many parts through-hole as possible for ease of assembly. 4. There are two types of designs here: 1. General: Has all the circuits required to work with any radio, that needs to be configured. 2. Radio Specific: Trades Configurability for Simplicity. Make a simpler device for a specific radio.

Main components on the Main-Board

LM78M05_TO252LP5907MFX-2.5LM4808NJM4580LTV-217-B-G

Main-Board bill of materials (BOM)

146 components, 40 distinct parts.

QtyPartRefs
1
LM78M05_TO252
U1
1
LP5907MFX-2.5
U2
1
LM4808
U3
1
NJM4580
U4
1
LTV-217-B-G
U5
1
OHIS Radio Port
J2
1
Radio Mic RJ45
J3
1
Mic Pinout Config
J4
1
GX16 Riser
J5
1
Radio Mic 3.5mm
J6
2
CTIA/Headphones
J7, J11
1
Radio Headphone/Speaker Front
J8
1
Radio Headphone/Speaker Rear
J10
1
0.5A
F1
1
200mA
F2
3
1k
RV1, RV2, RV3
1
HP Left Transformer
T1
1
HP Right Transformer
T2
1
Mic Transformer
T3
1
+12v
TP1
Show 20 more
QtyPartRefs
1
+5v
TP2
1
+2.5v
TP3
1
GND
TP4
1
SS34
D1
1
Green LED
D2
29
RF Choke
FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB8 +21
8
0.1uF
C1, C3, C4, C37, C39, C49, C50, C54
1
0.33uF
C2
5
47uF
C5, C9, C41, C53, C56
9
1uF
C6, C8, C38, C40, C45, C46, C51, C52 +1
1
47uF
C7
27
100pF
C10, C11, C12, C13, C14, C15, C16, C17 +19
2
470uF
C26, C34
6
330pF
C35, C36, C44, C47, C59, C60
1
10uF
C48
10
1k
R1, R2, R11, R12, R13, R14, R20, R21 +2
3
100R
R3, R4, R19
8
10k
R5, R7, R8, R10, R15, R17, R24, R26
6
33k
R6, R9, R16, R18, R25, R27
2
0R
R28, R29

Main-Board design files

The KiCad project lives in the open-headset-interconnect-standard/radio-adapter repository on GitHub; these links point at the commit this page was built from.

Main-Board: common questions

How big is the Main-Board?

The Main-Board measures 100 × 84 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main-Board?

146 components, from 40 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main-Board design files?

From the open-headset-interconnect-standard/radio-adapter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Main-Board design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which open-headset-interconnect-standard chose for the repository.

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