Here's the experiment I did: it was a wheel roll-down test, which measured the time it took for the wheel to come to a complete stop from a hard spin. It was a science experiment I did with my 9 year old daughter. The higher the resistive load on the dynamo, the faster the wheel comes to a stop. We did the experiment on two different dynamo wheels: a 650B wheel with Schmidt Hub, and a 20" wheel with SP hub. The 20" wheel had much faster roll-down because smaller wheels have lower rotational inertia. Notice the sinewave charger had the same wheel roll-down time as nothing at all attached to the dynamo. The lights had the fastest roll-down time. I also threw in a couple of different resistors for comparison.
Anton velolumino.com <https://lh3.googleusercontent.com/-VRhro7LvjtY/VeOfzo9n70I/AAAAAAAACHM/JRjgvr_q2tA/s1600/graph.jpg> On Thursday, March 31, 2016 at 1:41:17 PM UTC-4, Anton Tutter wrote: > > I did an experiment, and came to the conclusion that the Sinewave charger > does not draw any significant power when there is no device plugged into > it. According to Sinewave's owner and founder, it draws about 6mA without > any device plugged in. That's about 1% of a typical dynamo load. > > Most modern headlights have built-in on/off switches. > > If you have a threadless headset, you can even get an integrated switch > for your lighting system that looks like a rotating stem cap, it was > developed and is hand-fabricated by me and Tom Matchak and we sell it > through Velo Lumino. > > Anton > velolumino.com > > On Thursday, March 31, 2016 at 12:43:06 PM UTC-4, drew wrote: >> >> Thanks for all the responses. Looking forward to sitting down with all >> the links and info. It's a whole new realm. >> I like the simplicity of luxos+usb. seems like it would be the easiest >> option. Something like Sinewave is actually what I assumed I was going to >> have to use, and that plus an external battery seems maybe more powerful >> and more boyscouty in its preparedness. >> >> Excuse the dumb questions, but... >> >> Say you go sinewave + random light. Are there off switches on these >> things? Or I guess, is the sinewave pulling power if nothing I plugged into >> it. Conversely, are there plain off switches on most lights? I'm aware that >> some have a light sensor with daytime/night time power. >> I guess my goal is to be able to power phone, music, camera (I have one >> device for each... I know, I know) during the day and use only the light at >> night. Just trying to see if power would need to be divided in this setup, >> or if day/night useage could be fully dedicated to power/light, >> respectively. >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
