Safety Shut Down 3D Printer With Smoke Detector

Why did make it?
A 3D printer using filament deposition is a complex machine involving electricity, parts in movement, hot temperature elements, flamable parts and high energy content consumables. It does present significant risks. As for now, without safety standards and incitation to proper design, with low cost components and absence of real certification , consumers 3D printer are dangerous equipment and shall be handled as such.

This is a smoke detector that can shut down power automatically and wirelessly when senses the smoke.As I know someone don't like the wireless, and there is also a simple way that you can remove the radio modules and wiring the signal directly to the socket relays.

1 × remote control power socket (433MHz)

1 × smoke detector (Arikon,JKD-501,tiny optical)

1 × radio transmitter (433MHz)

if you don't want do it yourself or can't purchase them,you can buy it from

https://www.tindie.com/products/17131/

there is a header which contain 3 pins(G/S/V) on the detector'PCB.

G:negative power supply,

S:Signal output ,

V:positive power supply,

there are 2 pins to on the radio transmitter (GND/VDD)

VDD:positive power supply,

GND:negative power supply,

soldering the radio transmitter's 'GND'/'VDD' line to detector's 'S'/'V'. when the somke detector senses the smoke or fire,it will set the 'S' voltage from 3.3v to zero,then the 433MHz radio transmitter will work, and send the signal to close the power socket.

you can buy from https://www.tindie.com/products/niujl123/shut-down-3d-printer-by-smoke-detector/

make sure that is stable and safely,has the isolated power supply for the relay and wirless module.