After a significant amount of work I’m close to being able to show V3 working on a bike. However there are ramifications to my intention to post the code / [ … ]
Power Meters – Why
I love bikes. I love riding. I love the feeling of the first ride of the year after being cooped up inside all winter knowing that I’m stronger, faster, fitter, [ … ]
V3–Update and Naming
Sorry it has been a little while since I’ve updated this. So everyone knows I’m very much committed to this project however I’m constantly running up against minor issues.Recently I [ … ]
Minor Improvements–V2 helps V3 Debug
Why is the Left crank arm of V2 connected to V3 via frankenwiring? I was experiencing some very peculiar ADC behaviour. It’s hard to see, but next to the LM-4140 [ … ]
V3–Testing Video
Yes, it’s finally getting near the point where I can put this version on a bike and not have to fight with soldering, wires, and tape to hold it together. [ … ]
A brief interlude
This won’t be a trip to the lobby but rather a reflection on the state of sports sensors. If you don’t want to read all of this the short is [ … ]
V3–Power Consumption
The total power consumption doing a read to Serial over USB is approximately 35ma. This is much too high. That means a coin cell (CR2032 at 225mah) setup will likely [ … ]
V3–A little too sensitive?
Coming soon, current consumption measurements! Above is the raw data from the calibration test. I used the setup below with a few weights from my dumbbell that weight approximately 10lbs. [ … ]
V3–Reading Sensors, Transmitting Power Data
If you are good at reading between the lines you’ll understand that the title alludes to two separate tasks, but they have not been combined. So the short is, the [ … ]
V3 Progress
No pictures today. Just a bit of a text update. I’ve received all the components to complete the V3 circuit board. Surface mount soldering by hand is generally difficult, but the AP2 [ … ]