Most helpful critical review
2 of 2 people found the following review helpful
on February 6, 2015
works with common 5.5mm x 2.1mm plugs, and has an actual on/off switch built into the knob, but the PWM frequency is too low for my liking. it leaves visible strobe trails and seems more irritating than usual when you glance at a bare LED.
sticker on bottom says "DC 9-24V" center positive, and no UL certification or anything.
inside it has a AOD472 25V 50A MOSFET, a NE555 timing chip and LM358 op-amp, so maybe it could be modified to have a faster PWM frequency or higher current rating if you were good with electronics.