Ultra bright bike light for under 3€
thingiverse
This is a straightforward bike light design I'm sharing with you today. I ordered one of these MR16 12V DC LED spots with 15 Watts from Ali Express: https://de.aliexpress.com/item/32809806189.html. Make sure to get the warm white version since it makes spotting objects in the forest under wet conditions much easier. I printed my ring using 100% infill with PLA, which might not be strong enough but time will tell. I simply soldered two wires to the end connections of the spot. The spot itself is held in place by using hot glue. These MR16 DC LED spots should work with any Li-Io type battery ranging from 3s to 4s. I power mine directly from my e-bike battery using a DC-DC stepdown converter. Check out my half-encasing for stepdown converters.
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