DIY Power Meter

Keith Hack has posted his latest creation and accompanying DIY guide for the V3 cycle power meter. This design and accompanying software are claimed to measure L/R power. Fabulous..

The 3rd generation (current) DIY PM

Cost breakdown:

V3 Parts Cost	quantity	price	total
Crank	1	140	140
Strain Gage	2	12.5	25
Instrumentation Amp	2	4.1	8.2
Low power ADC	2	18	36
Micocontroller (Pro Micro)	1	25	25
ANT+  AP2 Module	1	24	24
Resistors	4	4.6	18.4
PCB (Rush Proto Service)	1	37.5	37.5
Misc (Caps, wire, pins, etc)	1	20	20
Build a PM for:			334.1

http://keithhack.blogspot.ca/2013/01/v3power-meterthe-complete-how-to.html