Homemade Smart Emergency Torch Using LDR
Homemade Smart Emergency Torch Using LDR
This is our new project, name of this project is Homemade smart Automatic Torch Light Using LDR. this is very useful project for daily use, we can use it in out home, and it's main feature is that it is automatically Turn On in Dark and Turn Off in Light, so we do not have to search the torch when Electricity is cut.
Components Used In Homemade Smart Emergency Torch :
1. LM358 Op Amp IC
2. Potentiometer 10K
3. Resistance 10K
4. Resistance 1K
5. LDR
6. BC547 Transistors
7. Li Ion Battery
8. Li Ion Battery Charge Control Circuit
9. LED Strip
10. Plastic Enclosure
Working Of Homemade Smart Emergency Torch :
In this project main part is Control Circuit, ain the control circuit a LM 358 Op Amp is used, which working in comparator Mode. In this mode an potentiometer is connected to Pin number 2 of LM358 and one LDR and 10K Ohm Resistance Connected in Series and common pin is connected to the pin no. 3. Pin no 4 is connected to the GND and pin 8 is connected to the VCC another pins are connected to VCC and GND according to Circuit diagram, Pin 1 is the output pin which is connected to the Base pin of BC 547 Transistor, which is used to trigger the LED strip, because we can't connect output directly to the LDE, so we used an Transistor for amplifying the current.
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