How to make a fire Alarm sensor

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 base got current the collector flow current and emitter current reach, then cause for flowing current into collector since LED have sited series between collector and battery positive terminal the LED Light Up. 
Here is YouTube Video Tutorial for this Circuit. or You can watch on this page , just click the Video .

YouTube Videos: How to make LDR Dark Sensor Simple DIY Circuit

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