In this video I have been trying to Make a 2 Incredible Homemade Electronic Inventions. 1) How to Make a Laser Security Alarm and 2) Police Strobe LED Light .

Materials you need to Make it :
1. LDR Sensor
2. Buzzer
3. R1 6.8k
4. R2 100 Ohm
5. LED Bulb
6. Old Watch Machine
7. 9v Battery

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15 thoughts on “2 Incredible Homemade Electronic Inventions

  1. I felt very stupid, the first one we can use bc 547 or 558. The second one what are you doing, the leds were just blinking.

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