All,
Just wanted to post an update on this project.
The version 2 board has survived a month now in the NC heat and despite temperatures up to 110ºF it has operated flawlessly. The watchdog has only reset the Electron once so, all seems to be good.
That said, I wanted to make one more tweak before going final on this project and making a larger production run. Here are the improvements for version 2.1 which was sent to OSHPark yesterday.
I added a user-defined push button switch. I will use this to turn the Particle RGB and D7 LEDS on an off but, it can be used for anything.
I enabled the “Kill” feature where the Electron could shut itself off completely. The only way to turn the Electron back on would be to physically push the power button.
I added a 5V buck converter to Vcc for the 2nd i2c port. Before this came from Vin. Now that it is separate, Vin can now be 3.9-12V enabling the use of 12V Solar Panels for power.
Both the Vcc and the 5V supplies have their own ESD protection and fuses
Here are the Schematics. Once I have tested the board, I will write it up and provide the EAGLE files and Bill of Materials. If anyone wants this sooner, send me a PM and I am happy to provide.
Thanks for all your help on this project.
Chip
