Review: Noctigon KR4 (18650, 4xE21A 5000K, CRI96)

[thefreeman]

@clientequator

@BurningPlayd0h

AFAIK FET + sense resistor for constant current linear driver that can be set to anything up to the max - 7.5A for E21A, 5A + fully open FET channel (PWM used between 5A and full turbo) for other emitters.

not same driver but most likely the same type of implemenation. Previously I saw loneoceans make a schematic of the K9.3, so this is probably the same but with only one channel.

Careful with water and Noctigon K9.3! - #67 by loneoceans

I posted the D4v2.5/KR4 CC circuit previously here : Adventures in TinyAVR 1-Series - #91 by thefreeman

Indeed it’s the same except R3 which sets Vsense to 50mV (5A) instead of 90mV(9A).