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Alcohol Detection System With Alcohol Sensor

This Project Demonstrate How to make a DIY Alcohol Detector with a  MQ3 Alcohol sensor and Arduino Nano Board.. The Circuit Detect Alcohol and Turn on buzzer and Led as Alert system. Application Of this Project is Detect drunken driver and Disable him to drive car or vehicle for protect From Road accident . Components: 1. MQ3 Alcohol sensor 2. Arduino Nano 3. Buzzer 4. Red LED 5 Some Wires Alter finish connection of circuit , Plugin usb from arduino to pc for upload program ,.. the code in below Just Copy and Pest the code to arduino software. Download Arduino software : https://www.arduino.cc/download.php?f=/arduino-nightly-windows.zip Program for Arduino : const int MQ3=0; const int Buzzer=8; const int LED=9; int value; void setup() { Serial.begin(9600); pinMode(MQ3, INPUT); pinMode(Buzzer, OUTPUT); pinMode(LED, OUTPUT); digitalWrite(Buzzer,LOW); digitalWrite(LED,LOW); } void loop() { value= analogRead(MQ3); Serial.println(value); if(va
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How to make a fire Alarm sensor

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This Post only for demonstrate how a make a Fire sensor using Transistor and detect fire  .. Its easier to make a Fire alarm project With this circuit. Ill make a project at future with this..  Requirement Components:   1. transistor 2x BC547  2. LED  3. 3 Register 10k Ohm 2x  + 18k Ohm 1x 4. 9v Battery + battery Clip (You can use less or more then 9v , just need to change Resister with battery voltage. i prefer battery voltage should be between 6-12v). 5. some wires . normally use jumper cables. NB:  Here I used Read LED , this led more voltage tolerant then white LED . so you must choose more Ohms Register for ignore fusing your LED.  Circuit Diagram: How Diagram work:   when the 3 number register's coil worm up a small current flow through base and on the other hand the first transistor collector already got current , so base current with collector current make flow emitter current which flow towards second transistor base , when second transistor b
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How to make LDR Dark Sensor Simple DIY Circuit

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This Post only for demonstrate how a #LDR work and using a single #LDR and #Transistor make dark detection sensor .. Its easier to make a Security alarm project from this circuit. Very recent I'll share similar project with this circuit. Components For Dark Sensor Circuit Requirement Components:   1. transistor BC547 2. LDR (Light Dependent Register ) 3. LED  4. 3 Register 10k Ohm 2x  + 18k Ohm 1x 5. 9v Battery + battery Clip (You can use less or more then 9v , just need to change Resister with battery voltage. i prefer battery voltage should be between 6-12v). 6. some wires . normally use jumper cables.  Circuit Diagram: Circuit Diagram For Dark Sensor Circuit How Diagram Work:  BC547 NPN transistor is most use full and Cheap Electronic component with have 3 pins  Emitter,Base and collector, when supply current through this transistor for base and collector current emitter flow current while base emitter disconnected by A LDR , LDR only active
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