So, instead of studying I sat down and worked on the PCB for this little Project.
Will be ordering the prototype driver PCB sometime around Christmas
Design stage:
In simple terms, 110W ((37v*3A) LED (Cree CMT2850) driven by an ic (TI LM3409) with poti for dimming.
The whole thing runs off the battery pack. pretty much any pack between 30v and 70v.
Has Undervoltage around 30v, which it needs cause at full bore it’ll drain your pack all by itself in some fraction of a day.
Lensing TBD but I want to see how it fairs without lensing, just reflectors (the cheap alibaba things). Hopefully, the front of the deck keeps most of the light going down and out instead of blinding the ride.
Mounting will be a U-bracket, that wraps around the base of the trucks. LED will be under the deck / forward,
PCB will be towards the back. currently designed with xt60s between the battery and LED. So the LED will be on its own pcb in front, with a wire connected, and then in rear (of the front truck) will be the driver PCB and connector to the battery.
The poti can be any kind, just max R of 250K Ohms, mounted at the through holes on the left
U-bracket will be some sort of metal. probably just something cheap bent into shape for now.
The idea is for the truck to act as a heatsink.
Driver PCB
Cree LED
https://www.arrow.com/en/products/cmt2850-0000-000n0u0a40g/cree
CAD of mount:
TBD
*No there is no warranty, no idea when or if Ill be selling these, (but if you did it would be like 30$) to build one yourself
** No its not necessary. but is funny
