Smoke detector - Savety shut down Printer

thingiverse

This project belongs to every printer owner, and every printer should have one. It focuses more on the project itself rather than just printing parts. I've read stories about printers catching fire or electric components burning out, which highlights the importance of security measures like smoke detectors. To prevent major damage, especially since printers often operate without supervision, installing a smoke detector is a must-have. This version is budget-friendly and relatively easy to build, even for beginners. However, there's always room for improvement in terms of electrical and programming aspects. This project was completed quickly, but it still works as expected. Here's what it does: - Two smoke detectors (ANET A8) are placed on either side, one monitoring the power supply and the other the main electric components. - If any of these detectors detect smoke, they cut off the main power supply using a relay. - The 9V battery powers the detectors and display, displaying an alarm message. - There's also a stopwatch feature for personal use, such as measuring print time. To reset an alarm, you need to restart the entire system. Here's what you'll need: - 1 Arduino (I used an Arduino Nano) - 2 smoke detectors MQ02 with analog output (4 pins each) - 1 dual-relay or two single relays for Arduino (5V) - 1 DC-DC converter from 12V to 5V or adjustable - 1 OLED display 128x64 I2C (I used a 1.3" OLED display) - 1 simple diode (I used a N4005, as it's what I had on hand) - 1 push-button - 1 battery between 7V and 24V (I used a 9V block battery) - Breadboard for soldering - Few cables - Soldering iron - Mini-USB cable - Arduino studio software (available at https://www.arduino.cc/en/Main/Software) Note: - If you turn it on after a long period of inactivity, the detectors might detect high smoke levels and trigger an alarm. Wait until the reading drops below 40% and reset the detector or Arduino. - It's easy to add a siren to this project by using the main power through the other relay contactor or adding another output inside the software.