This is a common laser-augmented bicycle light sold on ebay. It has the usual multi-pattern red LEDs with seven effects plus off, but also has two line generating lasers that project a “zone” of two lines at the rear of your bike to encourage motorists to give you some space.
I wasn’t expecting this to be too impressive, but it was actually pretty good. The beams were quite well defined on the ground and seemed to have been quite precisely aligned for such a cheap product. I’m guessing the factory probably has an aiming target set up for each assembler.
The control of the LEDs and lasers appears to be from two common bike light flasher chips, both mounted as COBs (Chip On Board) where the chips are bonded directly to the PCB, linked to adjacent pads and then covered in a blob of resin. In this case an elongated blob of resin to cover both chips.
The lasers draw more current than plain LEDs (30mA each) so a transistor is used to boost the current up to drive them.
The laser modules are based on small pieces of PCB material and a shim of copper that looks like it is bonded on with a thermally conductive layer to help take the heat away from the tiny laser chip, and also protect the open LED laser from damage as it is inserted (wedged) into a suitable housing.
Here’s a link to the ebay listing I bought this item from:-
You can also find them on ebay by searching for the words rear bike laser.
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