Tag Archives: Open Source

I2C master mode emulator

via Dangerous Prototypes

Dilshan has published a new build:

The I2C master mode emulator allows communication with I2C devices by sending or receiving data to/from the I2C bus. To issue the I2C commands, the emulator should connect to a PC over the USB port. After initializing the emulator, the PC and directly control the I2C slave chip/module.
This emulator is based on ATmega16A MCU. The USB communication channel is develop using the V-USB firmware.

More details on Jayakody’s blog. Project files available on GitHub.

Low-cost open source ventilator-ish device

via Dangerous Prototypes

Johnny made a low-cost ventilator-ish device, that is available on GitHub:

In the event that COVID-19 hospitalizations exhaust the availability of FDA approved ventilators. This project documents the process of converting a low-cost CPAP (Continuous Positive Airway Pressure) blower into a rudimentary non-invasive pressure support ventilator that could help with breathing during respiratory distress. It’s an evolving project, but in it’s current form, it most aligned with the definition of a non-invasive pressure support BiPAP ventilator.
This same project can also be used to create a reasonable low-cost Powered Air Purifying Respirator (PAPR) with filter adapter and mask.

See the full post on Johnny Chung Lee’s project blog.

Check out the video after the break.

Thermocouple meter and datalogger

via Dangerous Prototypes

Thomas (LA3PNA) has designed and built a thermocouple meter, that is available on GitHub:

I have designed a thermocouple meter for use for obtaining temperature readings from thermocouples. Its used together with the thermal chamber described elsewhere on this site. The design is done primarily as a programmable instrument, but it has a OLED display, so it can show the current temperature. The programming uses SCPI, the same type of programming strings that most newer (1990 forward) instruments use.

See the full post on RF and electronics blog LA3PNA.

DIY portable video conference, sharing and teaching device

via Dangerous Prototypes

A DIY conference and teaching device @ mcuoneclipse.com:

COVID-19 is by far not over, and in Switzerland the infection rate is going up again (2nd wave?). During the spring 2020 semester university lock-down we moved pretty much everything to a ‘distance learning’ setup. With that experience and with the request to prepare for the fall semester, I have constructed a DIY conference and teaching device which should make things simpler and easier: a combination of video camera, speaker phone and a muting device

M17 open source radio

via Dangerous Prototypes

Wojciech Kaczmarski (SP5WWP) and his team have been working on the M17 open source digital radio project:

Open source handheld for a novel digital communication standard called M17.
The goal here is to kick the proprietary protocols off the airwaves. To do that, it’s not just good enough to be open, it has to be legitimately competitive.

See the full post on M17 Project web site.