When I bought it [from a weird old man..] it was equipped with front and rear bulb lights, powered by a dynamo.
As you maybe already know, this is not the best solution to light your way home at night: dynamo and inertia are enemies and the dim light of bulb lamps turns off as you stop at a crossroad.
After some months of sweat and darkness, I wanted to switch to a more efficient solution but I didn't like how modern LED torchs looked on my bike.
So I decided to create my own classical looking light.. with future inside.
Step 1: Stuff and Tools
- original rear light (free)
- chinese solar torch key-ring (2,5€)
- small toggle switch (1€)
- red LEDs stripe, I've taken it from another bike light (1€)
- hot glue gun
- tin wire
- soldering iron
- desoldering pump (optional)
- multister (optional)
- dremel (optional)
Step 2: Modify the old light
We need only the plastic case, the red reflector and the clear red cap.
Widen the side hole, where the wire from the dynamo used to be, until the toggle switch fits inside it.
If needed enlarge also the upper hole where the LEDs will be placed.
Step 3: Open the solar torch
You should find a circuit made of:
- a mini solar panel
- a rechargeable battery
- a switch
- a diode
- a resistor
this circuit is really simple but maybe you want to take some pictures of it before desoldering anything.