I made my first light over two years ago and was pretty convinced enough light could be had to make this viable off road and in technical trails, but there were several problems:
- The light turned off when I stopped
- The light didn't even come on until I was moving at a half decent speed
- The speed needed to get a decent amount of light was actually pretty fast
- When the light finally came on, with my crude smoothing, it was so flickery, it made your eyes hurt
- Did I mention it turned of when you stopped?
- Oh, and I knew little about how to overcome these problems
Two years of prototypes later and I think I've overcome all of this. My little winter project, that has actually taken hundreds of hours, has finally reached the final throws of development (although I must confess I have a few new thoughts I want to try out, once an engineer, etc!).
|Head unit is super compact on the bars & no battery weight swinging around on the stem or top tube|
|Compact <100g circuit tucked at the bottom of the right hand fork leg, sealed in a bit of innertube|
|The deanamo definitely stays on and gives out plenty of light when the bike is stationary!|
|The K-Lite head unit up close|
Through all this I have been aware that Kerry Staite of K-Lite in Australia had also made, and been tinkering with, a dynamo light. He makes a lovely little battery light too, it is this that the dynamo is based around. He was kind enough to let me get my hands on one of his head units with his current dynamo circuit and after a bit of discussion with him, a tweak by him to his circuit to my suggestion as a result of my homework and experiments and a the exchange of a few ideas between us, have helped us both move forwards. I have made some further "tweaks" to the circuit to give it my full deanamo functionality to my own preference (I know Kerry is tweaking his to his own liking as I type too). Thanks Kerry. Here it is, and very happy I am with it too.
|Another standlight picture, just because I'm so happy with the end result!|
|I'm not to blame for the name, someone else christened it for me, and it stuck|
I have also had the great pleasure of getting my hands on a disc dynamo hub from SP Dynamo, their tiny, disc compatible, super light (410g) PD-8 model to which I have paired the light. This has been rolling around on mid week thrashes and my daily commute to work for just over a month now, or for about 1000miles, and so far it's been nothing but reliable and worry free.
|The SP Dynamo PD-8 hub dynamo, 410g and plenty of power|
I can't wait for the SP dynamos to be more widely available, and they come in lots of pretty colours too. I need one of the <400g SV-8 hubs on my road bike too now.
|Ooh, shiney! (I therefore need and want these!)|
My little project is nearing completion, at least for now. Final tinkerings are taking shape and new ideas sre being put on hold for now, so....... watch this space! :-)