2 layers85 × 100 mm
2 layers85 × 100 mm
Modbus I/O modules on ATmega
- Size
- 85 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 65
- Nets
- 58
- Pads
- 198
- Tracks, vias
- 466, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 2 Jul 2018
- Updated
- 17 Jan 2023
Overview
7RO is an open-source printed circuit board by thoczek, from the thoczek/Modbus-IO repository on GitHub, published under the LGPL-3.0 licence. It is a 2-layer board of 85 × 100 mm with 65 parts on 58 nets, routed with 466 tracks and 0 vias.
It is built around the BC337. Its parts include 17 diodes, 11 capacitors, 9 connectors, 7 transistors and 7 switches. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdModbus-IO modules
Complete Modbus I/O modules on ATmega8
Contains:
- 4DI-4DO - 4 digital inputs 24VDC and 4 relay NO/NC outputs
- 8DI - 8 digital inputs 24VDC
- 7RO - 7 Relay outputs NO/NC
- WIFI - Module for WIFI conectibity for modules
- EAP-MODBUSconfig - Software for configuration of the modules.
Modules have possibility to act in TCP mode throught WIFi module.
Technology used:
Schematics and PCB board done in Kicad.
Firmware - C++ eclipse.
Software - C#
Parts
65| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | bornier3 | P2, P3, P4, P5, P6, P7, P8, P9 | |
| 7 | relay-G5LE | K1, K2, K3, K4, K5, K6, K7 | |
| 7 | BC337 | TO92_Moj | Q1, Q2, Q3, Q4, Q5, Q6, Q7 |
| 6 | R-12 | D2, D4, D5, D6, D7, D8 | |
| 6 | R-10 | D1, R3, R4, R5, R15, R16 | |
| 5 | 100nF | C-5 | C3, C7, C8, C9, C12 |
| 4 | 450 | R-10 | R7, R8, R9, R10 |
| 4 | DIODE | R-10 | D10, D11, D12, D13 |
| 4 | P*** | 1pin | 1PIN, 1PIN, 1PIN, 1PIN |
| 2 | 4,7uF | C-2_5 | C5, C16 |
| 2 | 47uF | C-2_5 | C4, C6 |
| 2 | C | C1-1 | C1, C2 |
| 1 | 7805 | U1 | |
| 1 | DIP-8__300_ELL | IC2 | |
| 1 | 3k | R-10 | R2 |
| 1 | 4.7k | R-10 | R1 |
| 1 | ATMEGA8-P | DIP-28__300_ELL | IC1 |
| 1 | CONN_PWR | bornier3 | P1 |
| 1 | CRYSTAL | Osc_Moj | X1 |
| 1 | LED | LED-3MM | D3 |
Questions
How big is the 7RO PCB?
It measures 85 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 7RO use?
65 parts, built around the BC337. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 7RO KiCad files?
From the thoczek/Modbus-IO repository on GitHub, at the commit this page was made from: the board is 7RO/Board/7RO.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 7RO design in my own project?
Its repository publishes it under the LGPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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