The interrupts are acting a little different than I expected based on my current limited experience. They seem to be active when the pin is in a certain mode rather [ … ]

Ah ha! I found it! How to have the nRF51422 wake up on sensing the ADS1247 is ready to be read. Unlike the ADS8321 I previously used which converts as [ … ]

I have to thank Ray from www.dcrainmaker.com for his post. I think it paints a pretty good picture of things. His posting did highlight something. My initial reluctance to BTLE. [ … ]

Just a small update today on what I’ve been working on. nRF51422 – Talking to the ADS1247 on the SPI bus, figuring out the reference code, and reading and writing [ … ]

I just attempted to recalibrate the meter but this time with it installed in the bike. It confirms my original calibration, the one that is less than that of the [ … ]

Update: New Calibration information, issues presented at bottom is an anomaly of calibrating off the bike, see here. In response to questions on accuracy of my V3 Prototype that was shown here [ … ]

It’s just taking a little longer as I’m adding information related to strain gauge misalignment. The primary things I’ve found out from V3 now include that the torque tube gauge [ … ]

Step 1) Calculate calibration adjustment based on Powertap and upload to microcontrollerStep 2) Break off the USB connector promptly after uploadingStep 3) More testing – To be posted soonStep 4) [ … ]

As I mentioned in a previous blog post I’ve been testing my V3 Powermeter. There is going to be a major overhaul with the next iteration but I can still [ … ]

After some mix up and delays by Fedex my EK and DK kit arrived. Some might be wondering why I ordered both the EK and the DK. I don’t actually [ … ]