A solar powered, cheap wireless mesh networking node to get communities back on their feet faster during and after crisis.
Waiting for these...
I just got a $50 gift code to OSHPark. Unfortunately, I already ordered the first run of PCBs somewhere else, but there is always at least a second run necessary with me :-)
Thank you very much hackaday!
Solar charging works! The WR703N is able to controll the charger, but unfortunately does not support low/full speed USB. The USB hub is therefore needed to "translate" to high speed USB. This can't be a permanent solution though, as its current draw is just ridiculous (>250mA).
Toner transfer method, one sided.
Building up a prototype for a USB controlled solar charge controller based on the MCP73871 and an AVR attiny with V-USB.
The idea comes from a product I bought from Adafruit a while ago which claimed near-MPPT performance by using only the MCP73871, a LiPo charger IC.
Thinking about this, I came up with several major design goals / headaches:
- cheap solar charger design
- keeping the batteries cool
- power-aware network provisioning