A set-and-forget I2C/digital datalogger from Jan on Hackaday.io
This is a logical development from my first and second logger projects. The idea is simple: The logger needs to be small enough to fit inside small spaces, e.g. a bee hive.
With the press off a button it starts/stops logging. The casing can be as simple as shrink tubing!
Assembly instructions on Mike Rankin’s blog:
Design files and source are available on GitHub:
This Sensor Board is yet another variation of another one on my site. It is not for sale with no real purpose in mind but the design files to make your own are here. The project was created as design challenge. My full time job is pcb design work and as a hobby I enjoy experimenting with new design ideas.
This was one of the more challenging designs I’ve worked on in a while. A few times I’d given up on routing it. Evan using four routing layers I found it tough. The idea was to hide the bezel of the display behind the board but have sensor components on that same board. It would look something like a little tiny television with all the components around the edges.
This latest revision has fixed a few issues I found on previous versions but the design idea can possibly help others in some way. Full credit goes to Adafruit for publishing the Feather M0 design files along with the bootloader. I used the Feather design to create the schematic for my board.
Ole Andreas Utstumo designed this board to log ECG waveforms:
A portable device that will log your ECG – the “waveform” of your heart – to your phone via bluetooth or to a memory card
The Heartbeat Logger is a portable device that that logs your ECG throughout the day and throughout the night, 24/7. While this certainly is nothing new, even as an open source project (see MobilECG), Heartbeat is a project that, aside being of personal value for me, is designed to be simple to use and understand, and might serve a purpose somewhere for someone.
The firmware and hardware design is available on GitHub:
Dean Gouramanis is building a wearable Bluetooth-enabled Arduino Pulse Oximeter:
bluetooth-enabled wearable device can measure Pulse Oximetry, and ambient CO2 24/7
The board is shared on GitHub:
Charles McClelland created a Wi-Fi Connected Teensy:
The basic idea is that this board will connect to GPS, obtain a GPS fix and report its location to Ubidots.
Ubidots can then display this information in a number of ways including showing the location and the number of times the sensor had been moved that day
The hardware design files and firmware source code are shared on GitHub: