2 layers140.5 × 30 mm
Type e
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
16 parts3kApache-2.0
2 layers55 × 32 mm
Humidity Sensor Solution based on ATTiny87, nrf2401+, Si7006 Humidity sensor
- Size
- 55 × 32 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 21
- Pads
- 68
- Tracks, vias
- 159, 5
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 23 Dec 2017
- Updated
- 26 Jan 2018
Overview
Hum is an open-source printed circuit board by trdenton, from the trdenton/humsensor repository on GitHub, published under the MIT licence. It is a 2-layer board of 55 × 32 mm with 16 parts on 21 nets, routed with 159 tracks and 5 vias.
Its parts include 5 resistors, 3 capacitors, 3 connectors, 2 ICs and 1 diode. It belongs with the sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.
README
README.mdHumidity Sensor Solution
A basic wireless humidity sensor solution. A work in progress. Get your PCBs at https://www.pcbway.com/project/shareproject/W04152ASD12_humxmit_v2.html
Check out the writeup here: https://skullspace.ca/2017/12/23/wireless-humidity-sensor-part-1-hardware-design/
Hardware
Check out the KiCAD design files for the transmitter/sensor in 'tx_pcb'
Software
Receiver
The receiver is based on an arduino mega (due to what I had laying around) and an nRF24L01+ module. The sketch can be fond in 'hum_sw/humrx'
Transmitter
The transmitter is based on an attiny87, si7006, and nrf24L01+. You can find it's source code in 'hum_sw/humtx'. It requires avrlibc and GNU make. the 'prog' subdirectory contains a scrip that will flash the transmitter PCB via avrdude. The included copy of avrdude is for my convenience, it is compiled for linux amd64
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10k | Resistors_SMD:R_1206_HandSoldering | R1, R2, R3, R5 |
| 3 | C | Capacitors_SMD:C_1206_HandSoldering | C1, C2, C3 |
| 1 | 470 | Resistors_SMD:R_1206_HandSoldering | R4 |
| 1 | ATTINY87-AS | Housings_SOIC:SOIC-20W_7.5x12.8mm_Pitch1.27mm | IC1 |
| 1 | AVR-ISP-6 | Pin_Headers:Pin_Header_Straight_2x03 | CON1 |
| 1 | Battery_Cell | hum:battery | BT1 |
| 1 | CONN_01X03 | Socket_Strips:Socket_Strip_Straight_1x03 | P2 |
| 1 | LED | LEDs:LED_1206 | D1 |
| 1 | RF24 | Socket_Strips:Socket_Strip_Straight_2x04 | P1 |
| 1 | SI7006 | hum:SI7006 | U1 |
| 1 | SW_Push | hum:switch | SW1 |
Questions
How big is the Hum PCB?
It measures 55 × 32 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hum use?
16 parts. 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 Hum KiCad files?
From the trdenton/humsensor repository on GitHub, at the commit this page was made from: the board is tx_pcb/hum.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hum design in my own project?
Its repository publishes it under the MIT 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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