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Battery-Run Lights

Bike

The old lights on my bike were just plain Jane bike lights from halfords. They are liable to be easily stolen, run out of internal battery and they aren't very bright. I decided to replace these lights with more substantial lights that run from the 50V battery.

old_light
old_light

Fig 0.1 The old clip-on light

1. Headlight 🤯 💡

I bought a headlight from banggood for €20 which is designed for a motorbike. It is a 35W bulb which I measured to be 2.8A@12V = 33.6W. Furthermore, there are heads and dipped options.

headlight
headlight

Fig 1.1 The new headlight

heads
heads

Fig 1.2 Heads mode

dips
dips

Fig 1.3 Dips mode

I also had to make a few modifications to the headlight. 1) I added a switch to be able to switch between heads, dips and off. The switch has an o-ring that seals against the light. 2) The bracket that came with the light was designed for a motorbike which has two downpipes on the front. I had to modify this to work with the single downpipe on my bike.

switch
switch

Fig 1.4 The added switch

2. Rear light 🍑 💡

The new back light is a 12V LED red light. I just zip-tied it underneath the seat so that it's protected from water and impacts.

back
back

Fig 2.1 The new rear light

3. 12V Regulator ⚡

I added a 12V 3A regulator that can regulate the ~50V battery. The device is an automotive spec regulator. The reason I chose this regulator is because it was the cheapest one I could find (€7.50). Car parts are some of the most affordable parts available because they have and wide range of uses and they're made in large quantities.

buck converter
buck converter

Fig 3.1 The 12V buck converter that regulates all 12V devices

4. Final Product 😍

back of bike
back of bike
front of bike
front of bike
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