2018.05.30

To make v2.0 useful:

Replace the 27k in the lower leg of the AP3012 comparator circuit with a 56k
to drop the voltage from ~27V to just under 12V.

In the AP3012 circuit, rotate the inductor and 4.7uF caps 90 degrees, and lift
pin 5 of the IC, to detach all of them from the 3.3V rail.  Use a wire to 
connect all of them to pin 4, the gpio driving the circuit.

The net effect is that we're making 12V from the gpio, which means all the LED
current and switcher inefficiency is coming as current through that gpio.  The
measured LED current is around 7mA, so this is "safe" for the SOC, but leaves
less engineering margin than we usually like.

Changing the circuit to be powered from v_lipo with the gpio hooked to shdn*
and controlling a FET switch on the output might be smarter someday?

2024.02.17
- Keith thinks we should move (back?) to USB mini B for TeleLCO, and suggests
  we deliver:
	https://www.mouser.com/ProductDetail/172-PX0446
	https://www.mouser.com/ProductDetail/172-PX0441-2M00
	https://www.mouser.com/ProductDetail/157-PX0484

  After looking at pricing, etc, I decided not to make that change.

2024.06.10
- beam.is has better 1170 orange pricing than Amazon, and without foam.  
  $44.95 per vs 56.77 per.  sent a quote request for 25 pieces through their 
  "wholesale" quote request thingy.