How to make a Laser Tripwire Alarm from scratch | Electronics DIY

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Hey friends! In this video, you learn how to make an anti-burglar laser tripwire alarm from scratch. I find this alarm that I made, to be quite practical for alerting you or someone nearby when a person breaks into a home. The best place to stick the alarm onto is behind a window, doorframe, or even into a couple of useless wall sockets in a room that face each other.
Yes, I came up with this circuit myself :)

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💾 Circuit diagram:

📁 PCB Gerber file:


🧵🔧📌 Components and parts needed for this project:
Perf Boards, Pin headers, and Connectors Kit -
(x2) NE555 Chip -
(x1) LM358 Chip -
(x1) BC547 NPN Transistor -
(x1) 10k Potentiometer -
(x1) 100nf Ceramic Capacitor -
(x1) 1uf 50v Capacitor (in kit) -
(x1) 220-ohm Resistor (in kit) -
(x3) 10k Resistor (found in kit)
(x1) 100k Resistor (found in kit)
(x1) Photoresistor (LDR) -
(x1) Buzzer -
(x1) Laser module/Laser diode -
(x2) Switch (SPST Rocker) -
(x1) Reset button switch -
(x2) 18650 3.7v Battery -
(x1) AA battery tray -
(x2) AA batteries -
Electrical wires (24AWG) -
Double sided tape or hot glue -

🪛🔧🔨 Tools and extra supplies I use:
➡️ Soldering Iron (Kit) -
➡️ Hot Glue Gun -
➡️ Box cutter/Utility knife -
➡️ X-Acto Hobby Knife -
➡️ Cutting Matt (Green) -
➡️ Needle-nose Pliers -
➡️ Wire Cutters for Electronics -
➡️ Wire-stripping tool (Automatic) -
➡️ Heat-shrink Tube Kit -
➡️ Jumper Wire Kit -
➡️ Breadboard for Prototyping -
➡️ Superglue -
➡️ Electrical Tape -

🎵 Music Credits:
Far Away - YT Audio Library
The Bone Train - YT Audio Library
Niềm Nở Năm Mươi

#tripwirealarm #electronics #lasers