3D Printer Filament-Detection-Module Run-Out Pause Detecting-Monitor Black for 1.75mm

Does it’s job and does it well. One star taken away because of two (minor) gripes -- the little blue led needs to be on the other side of the device. Any reasonable way to mount it on the printer, the light ends up pointing the other way and you cannot see it!- when changing filament you have to wiggle it a bit before it will pass through the microswitch inside. Probably a slightly better design of the plastic guides inside should help. Nothing too terrible though.

I have an Ender 5 with the silent 4.2.7 board running Marlin 2 (hopefully that helps anyone googling with the same issues I had). This switch is wired such that when the filament runs out, it sends a HIGH signal to the signal pin. The plug can be plugged right into the board, but Marlin defaults to expecting a LOW signal with the pullup resistor activated. Change the code so that the signal expected when filament is out is set to HIGH, deactivate the pullup resistor, and activate the pull-down resistor and this switch will work perfectly. I just printed something yesterday in 4 different colors using up several almost empty rolls, so it works great!

It arrived with a red/green/black wire, which is suspicious since the listing describes red/white/black, and with no pinout for the sensor available, I had to trust it. Also of note after having studied the picture in the listing, it looks like red/black were backwards as compared to what the sensor was expecting.I wired it up to my Raspi GPIO and got a solid high signal immediately. I tried reversing the poles, got a blue LED and a low signal, but in neither case did the state change when I fed filament through it. Hard to say whether the sensor was bad from the start or if it was bad wiring that caused me to fry it, but in either case I couldn't use it.

No better than the creality OEM unit. Literally 1day after my return window was over, I get constant false detections. Save your time and don't bother buying this unit

Did not work on Anycubic Mega S. Not wired as shown

Received product not pictured it had red,green,black wire not what they described. I plugged in my rasp pi3b+ didnt work. Also tried plugging it in to skr mini e3 got a pretty blue led but nothing passed that. Threw it in trash after that

none

good