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Humidity board

nEDM-TUM·Temperature-Sensor-System·circuit_boards/humidity/humidity_board.kicad_pcb

Humidity board layout, top view — open source AVR/Arduino board by nEDM-TUM

About the Humidity board

Humidity board is an open source AVR/Arduino PCB design by nEDM-TUM, published on GitHub. It is a 2-layer board measuring 100 × 20 mm, with 24 components from 16 distinct parts.

Its main chip is the ATMEGA88-A, from the AVR/Arduino family. Other key parts include the ST485 and HYT271. By type, the board carries 8 resistors, 6 capacitors, 3 ICs, 3 connectors, 2 diodes and 1 module.

It belongs with the sensors designs in this gallery.

From the project

System for reading/writing temperature sensors

Temperature-Sensor-System ==============

Sensor network system built for the nEDM experiment.

Features ------------------ - Both temperature and humidity sensors can be connected at any sensor socket. The sensor type will be automatically detected. - High temperature and humidity accuracy: Temperature sensors are calibrated to �0.1K and the humidity sensors to �1.8%rH. - A high number of connected sensors is supported. Currently 44 sensors are in use, however the system is designed to support at least 100 sensors and still be able to fulfill a sampling rate of 1Hz. If the sampling rate is…

Main components on the Humidity board

ATMEGA88-AST485HYT271

Humidity board bill of materials (BOM)

24 components, 16 distinct parts.

QtyPartRefs
1
ATMEGA88-A
IC1
1
ST485
U1
1
HYT271
U2
1
VAL**
m3_loch
1
RJ45
J1
1
ISP
P1
1
UART
P2
1
SW_RESET
SW1
2
LED
D1, D2
4
100nF
C1, C3, C5, C6
2
10uF
C2, C4
2
150
R1, R2
1
10k
R3
2
22k
R4, R5
1
120
R6
2
2k2
R7, R8

Humidity board design files

The KiCad project lives in the nEDM-TUM/Temperature-Sensor-System repository on GitHub; these links point at the commit this page was built from.

Humidity board: common questions

What microcontroller does the Humidity board use?

The Humidity board is built around the ATMEGA88-A, from the AVR/Arduino family.

How big is the Humidity board?

The Humidity board measures 100 × 20 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Humidity board?

24 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Humidity board design files?

From the nEDM-TUM/Temperature-Sensor-System repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Humidity board design in my own project?

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

Can I test firmware for the Humidity board 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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