Hello there,
I was browsing the web for answers but could not find any definite answer, so I decided to subscribe here since I know that this place is full of people that truly know their S - I WILL watch any dedicated videos on the subject but I just need to be pointed in the right direction.
I have an e-bike that runs on 42V (a standard 18650 battery pack with BMS), and I would like to be able to divert some of that power to various LED contraptions in order to not get killed on the way back home at night (where I live everyone is drunk past 6PM).
I have purchased a few modules on aliexpress (do not kill me yet) that DID step down the voltage to 12V, but dissipated a lot of heat while doing so. As such my mind went "so that's where the voltage difference went then...?"
But I then thought about modern switching power transformers, and as they do not heat up.
Could anyone point me in the right direction for me to dig up info on how to step down a variable voltage (42-34 depending on battery level) to a stable 12V with as little heat dissipation as possible? (if any)
Ideally, I would need to draw 10 to 20 Watts.
I feel very bad asking something that in appearance looks so simple, but I truly lost.
Thanks in advance and sorry ^^"