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Std EditionNanopiRS485-smd

Profile:NanoPI Neo LTS RS485 "hat"

License: Public Domain

Published Time:2022-02-15 17:19:32
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Description

RS485 "hat" to NanoPi Neo LTS.

PCB is same size than than Nanopi NEO LTS

RS485 is connected to UART1, so that needs to be enabled from configuration of Linux Distribution.

 

There is two different PCB desings, one to clear USB and LAN port so normal height female pinheaders can be used. On full sized PCB needs to use longer pinheaders to clear ports.

 

I am no electronics expert, schematic for RS485 is taken from Joy-IT RPI RS485 shield 

https://joy-it.net/en/products/ARD-RS485

 

Disclaimer: use at your own risk.

If used on some project i would love to get somekind of message how it works and such...

Documents

Schematic01

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PCB_NanopiRS485-Full

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PCB_NanopiRS485-hole

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ID Name Designator Footprint Quantity
1 1uF C1,C2,C3,C4,C5 C0805 5
2 PINHD-1X12 JP1-LEFT,JP2-RIGHT1,JP3-RIGHT2 1X12 3
3 DG500-5.08-02P-14-00A(H) PWR CONN-TH_DG500-5.08-02P-14-00A-H 1
4 0805G (Green) PWRLED,RXLED,TXLED LED0805-RD_GREEN 3
5 BSS123_C397175 Q1 SOT-23_L2.9-W1.3-P1.90-LS2.4-BR 1
6 2N7002 Q2,Q3 SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR 2
7 560Ω R1,R2,R7 R0805 3
8 10kΩ R3,R4,R5-RS,R6-RS R0805 4
9 120Ω R8-RS R0805 1
10 DG500-5.08-03P-14-00A(H) RS CONN-TH_DG500-5.08-03P-14-00A-H 1
11 MAX481CSA+ U1 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 1

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