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Etera uart bridge

Lenart12·etera-uart-bridge·pcb/optocupler.kicad_pcb

Etera uart bridge PCB layout, top view — open source AVR/Arduino board by Lenart12

About the Etera uart bridge PCB

Etera uart bridge is an open source AVR/Arduino PCB design by Lenart12, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 63 components from 15 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the NSL-32. By type, the board carries 20 resistors, 11 capacitors, 10 diodes, 9 connectors, 8 ICs and 2 fuses.

It belongs with the iot & wireless and sensors designs in this gallery.

From the project

Expander board for driving valve motors, relays and measuring tempature

This project is an expander board designed to provide control for valve motors, eight relays, and the ability to measure multiple temperature sensors using the one-wire protocol. The board is implemented using KiCad PCB design software and the PCB files can be found in the pcb folder. The firmware for the board is developed using PlatformIO and can be found in the pio-eub-firmware folder. Additionally, a Python library for interfacing with the expander board is available in the pyetera-uart-bridge folder.

Etera uart bridge, from the project README
From the project README

Main components on the Etera uart bridge

NSL-32Arduino_Nano_v3.x

Etera uart bridge bill of materials (BOM)

63 components, 15 distinct parts.

QtyPartRefs
8
NSL-32
U1, U2, U3, U4, U5, U6, U7, U8
1
Arduino_Nano_v3.x
A1
1
BS170
Q1
1
Conn_01x10_Female
J1
1
Conn_01x05_Female
J2
2
Conn_01x03_Female
J3, J9
4
Conn_01x04_Male
J4, J5, J6, J7
1
Conn_01x04_Female
J8
2
Fuse
F1, F2
1
Varistor
RV1
8
LED
D1, D2, D3, D4, D5, D6, D7, D8
2
D_Shockley
D9, D10
8
C
C1, C2, C3, C4, C5, C6, C7, C8
3
C
C9, C10, C11
20
R
R1, R2, R3, R4, R5, R6, R7, R8 +12

Etera uart bridge design files

The KiCad project lives in the Lenart12/etera-uart-bridge repository on GitHub; these links point at the commit this page was built from.

Etera uart bridge: common questions

What microcontroller does the Etera uart bridge use?

The Etera uart bridge is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the Etera uart bridge PCB?

The Etera uart bridge measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Etera uart bridge?

63 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the Etera uart bridge design files?

From the Lenart12/etera-uart-bridge repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Etera uart bridge design in my own project?

The repository has no license, so all rights stay with Lenart12. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Etera uart bridge without the hardware?

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

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