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Hermes Lite2 IO Connector

jimahlstrom·HL2IOBoard·KiCad/HL2IOBoard.kicad_pcb

Hermes Lite2 IO Connector PCB layout, top view — open source RP2040/RP2350 board by jimahlstrom
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About the Hermes Lite2 IO Connector PCB

Hermes Lite2 IO Connector is an open source RP2040/RP2350 PCB design by jimahlstrom, published on GitHub. It is a 4-layer board measuring 93 × 53.4 mm, with 116 components from 41 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the MASWSS0179TR-3000, AS78L05RTR-E1, MC74HCT04ADR2G, 74HCT541PW,118 and TBD62381AFWG,EL. By type, the board carries 36 resistors, 14 connectors, 11 ICs, 7 diodes, 6 transistors and 5 transformers.

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

From the project

A PCB added to the HL2 with IO resources to control filters and antennas

Please click the left button "- ----" above for a navigation menu.

Register names are now fixed, but there may be additions. Further documentation is coming, stay tuned. Please provide feedback, especially if you see a problem.

This project is a 5 by 10 cm printed circuit board and related firmware. The board mounts in the same box as the Hermes Lite 2. It mounts above the N2ADR filter board if one is installed. The filter board and the IO board are independent of each other. The PC running the SDR software sends the transmit frequency to the board. The microcontroller on the board then…

Hermes Lite2 IO Connector, from the project README
From the project README

Main components on the Hermes Lite2 IO Connector

PicoMASWSS0179TR-3000AS78L05RTR-E1MC74HCT04ADR2G74HCT541PW,118TBD62381AFWG,ELLM4040DIM3X-3.0/NOPBPCA9536DTLV9351IDCKR

Hermes Lite2 IO Connector bill of materials (BOM)

116 components, 41 distinct parts.

QtyPartRefs
1
Pico
U1
3
MASWSS0179TR-3000
U2, U3, U4
1
AS78L05RTR-E1
U5
1
MC74HCT04ADR2G
U6
1
74HCT541PW,118
U7
1
TBD62381AFWG,EL
U8
1
LM4040DIM3X-3.0/NOPB
U9
1
PCA9536D
U11
1
TLV9351IDCKR
U13
1
NUD3160LT1G
Q1
2
SSM3J374R,LF
Q2, Q3
2
BC847C-13-F
Q4, Q5
1
FCX491ATA
Q6
1
Conn_02x25_Odd_Even
J1
2
Conn_01x05
J2, J8
1
FAN
J3
2
Conn_02x04_Odd_Even
J4, J6
1
Conn_01x09
J7
2
142-0701-851
J9, J10
1
Conn_02x01
J12
Show 21 more
QtyPartRefs
4
TestPoint
P1, P2, P3, P4
10
TestPoint
3V1, 3V2, 5V1, 5V3, 12V1, 12V2, 12V3, G1 +2
18
100n
B1, B2, B5, B6, B7, B8, B9, B10 +10
2
TestPoint
Sw5, Sw12
5
TestPoint
T1, T2, T4, T5, T6
6
RB751V40T1G
D1, D2, D3, D4, D5, D7
1
B0530WS-7-F
D6
2
1.8u
L1, L2
2
1500p
C1, C3
1
680p
C2
1
0.33u
C4
1
1u
C5
8
10K
R1, R4, R7, R11, R33, R34, R35, R36
1
51
R2
1
470
R3
6
4K7
R5, R9, R17, R18, R30, R31
5
330K
R6, R19, R20, R21, R26
7
1K
R8, R13, R22, R23, R24, R27, R28
2
2K7
R10, R29
5
470K
R12, R14, R15, R16, R25
1
27K
R32

Hermes Lite2 IO Connector design files

The KiCad project lives in the jimahlstrom/HL2IOBoard repository on GitHub; these links point at the commit this page was built from.

Hermes Lite2 IO Connector: common questions

What microcontroller does the Hermes Lite2 IO Connector use?

The Hermes Lite2 IO Connector is built around the Pico, from the RP2040/RP2350 family.

How big is the Hermes Lite2 IO Connector PCB?

The Hermes Lite2 IO Connector measures 93 × 53.4 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Hermes Lite2 IO Connector?

116 components, from 41 distinct parts. The full bill of materials is listed on this page.

Where can I download the Hermes Lite2 IO Connector design files?

From the jimahlstrom/HL2IOBoard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Hermes Lite2 IO Connector design in my own project?

The repository has no license, so all rights stay with jimahlstrom. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Hermes Lite2 IO Connector without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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