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  1. தோட்டக்காரன்(gardener) (solariiknight@social.systemreboot.net)'s status on Tuesday, 20-Nov-2018 13:31:41 UTC தோட்டக்காரன்(gardener) தோட்டக்காரன்(gardener)
    • Cycling
    Today I charged my phone by using power from my bicycle's dynamo
    !cycling
    In conversation Tuesday, 20-Nov-2018 13:31:41 UTC from social.systemreboot.net permalink
    • தோட்டக்காரன்(gardener) (solariiknight@social.systemreboot.net)'s status on Wednesday, 21-Nov-2018 15:23:16 UTC தோட்டக்காரன்(gardener) தோட்டக்காரன்(gardener)
      • அருண் ஐசக் (Arun Isaac)
      Very slow during daily commute, but may be useful for long trips.
      The buck converter I used to charge the phone is not designed for dynamo. I had a feature phone, which charged about 35% in a 38km trip. The feature phone claims to have a battery of 2500mAh. I don't know how good it will be with my smartphone having a battery of 3600mAh.

      The buck converter seems to pull down the voltage of the dynamo down during slow rides, resulting in loss of power. (Dynamo is more of a current source, while the buck converter is designed to operate with a voltage source).

      I assume that with some improvements, it can supplement power for a phone that is recording a gpx track.
      In conversation Wednesday, 21-Nov-2018 15:23:16 UTC permalink

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