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STD NanopiRS485-smd
License: Public Domain
Mode: Editors' pick
- 0
Update time：
2022-03-01 13:35:16
Creation time：
2022-02-15 09:19:32
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...
Design Drawing
schematic diagram
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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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