In this project, we are going to build a Simple Smoke Detector Circuit without using any Microcontroller. This circuit triggers the Buzzer whenever it detects Smoke or fire near by it. This circuit ...

Circuit Diagram and Explanation: In this Arduino Alcohol Detector Shield we have used a MQ3 sensor to detect present alcohol level in the breath. A 16x2 LCD is used for displaying the PPM Value of ...

It really is a hands-on way to learn electronics and programming while building a useful gadget. Get your Arduino board and gas sensor to start creating your smoke detector today. Write a code for ...

I will attach all the schematics and the PCBs design for the project. I will start by doing the PCB design for the smoke sensor detector. Components: Arduino UNO; Power Supply; Smoke Sensor (MQ2) ...

The Arduino generates a series of pulses on which are sent to the coil. These pulses create a magnetic field around the coil. When a metal object is brought near the coil, the inductance of the coil ...

How to Install a Smoke Detector. Other smoke detectors circuits. please send us an email if you know other interesting circuits. RE46C190 photoelectric smoke detector – source Using this photoelectric ...

In this circuit we are not using any of this complicated components. Instead of these, we are using two LDRs and one LED. LM1801 special-purpose IC ,which is designed especially for smoke detectors, ...

Fig. 1 shows circuit diagram of the smoke detection alarm. The basic unit employs dual op-amp LM358 (IC1), transistor T1 and timer NE555 (IC2), configured in astable mode. Selection of MQ* sensor is ...

This optical smoke detector uses a low-cost, readily-available, slotted, through-scan, infrared photo-switch. When smoke is detected, the relay energises to activate the audio/visual warning alarm.