HardLabs

ML2

brucemack·microlink·hw/ML2/ML2.kicad_pcb

ML2 PCB layout, top view — open source board by brucemack
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About the ML2 PCB

ML2 is an open source PCB design by brucemack, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 125 × 56 mm, with 64 components from 44 distinct parts.

Other key parts include the TLV9164PWR, LTV-356T, LM1117MP-3.3, MCP4725A0T-E/CH and LM4040D30IDBZR. By type, the board carries 24 resistors, 18 capacitors, 6 ICs, 4 connectors, 4 diodes and 2 switches.

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

From the project

An open source EchoLink/AllStarLink implementation that runs on a simple microcontroller.

Is it possible to build a full EchoLink® node using a $6 microcontroller? I'm not completely sure, but let's find out. The goal of this project is to create the smallest, cheapest way to put a radio onto the EchoLink network. If you are new to the world of EchoLink please see the official website for complete information. EchoLink is a peer-to-peer VoIP (voice over IP) network used to link amateur radio stations across the Internet.

ML2, from the project README
From the project README

Main components on the ML2

TLV9164PWRLTV-356TLM1117MP-3.3MCP4725A0T-E/CHLM4040D30IDBZR

ML2 bill of materials (BOM)

64 components, 44 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TLV9164PWR
LMV324 (Actually LTV9161)
U1
2
LTV-356T
U2, U5
1
LM1117MP-3.3
NCP1117-3.3_SOT223
U3
1
MCP4725A0T-E/CH
MCP4725xxx-xCH
U4
1
LM4040D30IDBZR
LM4040DBZ-3
U7
1
DMG2305UX-13
Diodes Incorporated
Q1
1
DE9_RECEPTACLE
Conn_01x07
J1
1
PJ-102AH
5-12V Supply
J2
1
CONN_01X20
Conn_01x20
J3
1
CONN_01X02
Conn_01x02
J4
1
Jumper_2_Bridged
JP2
2
50K
10k
RV1, RV2
1
C7203003
~
S1
1
TS04-66-55-BK-160-SMT
SW0
2
Transformer_1P_1S
T1, T2
1
C84256
Red
D1
1
BAT54S
D2
1
C84259
Blue
D3
1
C2297
Green
D4
2
22U
10u
C1, C2
Show 24 more
QtyPartRefs
2
22N
22n
C3, C26
2
10N
10n
C4, C27
7
47U
47u
C5, C7, C8, C9, C11, C19, C20
3
0.1U
0.1u
C6, C18, C21
1
C22320
47u (Optional DC Block)
C10
1
47U
1u
C17
2
1.5K
1.5k
R1, R15
2
2.7K
2.7k
R2, R16
1
C17477
0R
R3
1
620
570
R4
2
2.2K
10k
R5, R6
1
220
200
R8
1
1k
R9
1
C17629
330k 1%
R10
1
C17589
270k 1%
R11
2
2.2K
2.2k
R12, R13
3
100
220
R17, R20, R22
1
C17477
0R
R18
1
220
R19
1
4.7
R21
1
0R
R23
1
C58595
1k
R24
1
39K
33k
R25
1
C17888
0R
R26

ML2 design files

The KiCad project lives in the brucemack/microlink repository on GitHub; these links point at the commit this page was built from.

ML2: common questions

How big is the ML2 PCB?

The ML2 measures 125 × 56 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ML2?

64 components, from 44 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 ML2 design files?

From the brucemack/microlink 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 ML2 design in my own project?

Yes, under the terms of its GPL-3.0 license, which brucemack chose for the repository.

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