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  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 2 weeks ago
    Batteryless Bicycle Safety Light

    I forgot about left-lane driving countries... sorry. You can just mirror the design before exporting it and you can mount it on the other side of your bike.

    Thank you. So I stand corrected of this being the first open design, did not know about that one.

    Done. See step 5.

    Yes, exactly. I just added a schematic to step 5.

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  • dedehai's instructable Batteryless Bicycle Safety Light 's weekly stats: 3 weeks ago
    • Batteryless Bicycle Safety Light
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      49 comments
  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 3 weeks ago
    Batteryless Bicycle Safety Light

    Good idea, let me know if you try it. So far I did not have any problems with broken lights. It is very rigid once it is installed. The ones on my old bike have been working for two years, summer and winter. Now the bike is broken but the lights still work :)

    There are higher brightness LEDs for sure. You also need to provide more energy.

    I am sorry to hear you messed up your computer. Whatever you downloaded it surely was not OnShape as it is a cloud based service and there is nothing to download or install.

    Thank you!

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  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 3 weeks ago
    Batteryless Bicycle Safety Light

    Good point. I will add one.

    Why is 'towards the road' the wrong side?

    Sure but 'ready made' is kind of missing the point of an instructable isn't it?

    Yes. See the introduction text in step 1.

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  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 3 weeks ago
    Batteryless Bicycle Safety Light

    Your statement is very inaccurate. First you need a diode rectifier to turn the AC voltage from the relay into a DC voltage to charge the capacitor. Then there is a resistor necessary to limit the current from the capacitor to the LED. And last but most important: a 1000uF capacitor charged to say 12V will only light a single LED for about 1 second until it is discharged.

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  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 3 weeks ago
    Batteryless Bicycle Safety Light

    You can certainly do that. In fact someone already made an instructable about this exact thing using an off the shelf inductive light.

    If you look closely at the video in step 1 you can see that I actually mounted three magnets on the wheel. Not balance the wheel (the weight influence of the magnet is negligible) but to make it blink faster at lower speeds.

    Thank you. A 5V relay does not work as well as a 12V relay because the output voltage is not enough to light up the LEDs brightly at lower speeds but in theory the energy output is the same. See my measurements and comments about that in my blog.

    similar as in 'same same but more fancy and expensive' :)

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  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 4 weeks ago
    Batteryless Bicycle Safety Light

    Thank you :)

    Thanks. The LED keychain is not needed if you solder the LEDs dirctly to the relay. Do not put them in series but in parallel, one of them in reverse which is called 'antiparallel', just google it and you will find the circuit. You can also just use two LEDs instead of three, or even four if you like (two parallel, two 'antiparallel') Good Idea of using zipties, will make it easier indeed. I may add a redesign of the housing to suit that.

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  • dedehai commented on dedehai's instructable Batteryless Bicycle Safety Light 4 weeks ago
    Batteryless Bicycle Safety Light

    Thank you!. I first saw these kind of lights when I was travelling in Danmark about ten years ago and soon later also found them in a local store, they are quite popular in Europe, but I think this is the first DIY design :)

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  • dedehai commented on dedehai's instructable Easy pixel nightstand lamp10 months ago
    Easy pixel nightstand lamp

    I am very sorry I missed your comment, saw it just today. I uploaded the code to my github repository. https://github.com/DedeHai/RGBmatrix_6x6_Workshop/tree/master/Arduino/RGBmatrix_6pixel_nightlight

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  • dedehai commented on audreyobscura's instructable World's easiest silicone mold.1 year ago
    World's easiest silicone mold.

    Ceramics as in heat resistant? Silicones are known to be almost in-destructable by chemicals (there are some nasty bases that actually dissolve silicone but nothing houshold-grade). Most silicones however start to degrade at 300°C. You could try to put your figurine on a barbecue grill and see if it can burn-off the residuals.

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