Build an Arduino Laser Security System Alarm that Calls You!

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In this video we make a GSM (cellular) upgrade to one of my previous electronics projects, the Laser Tripwire Alarm (Security System) using an Arduino Nano and SIM800L GSM SIM card module.
The main proto-board features an existing light-sensitive (LDR) alarm circuit which works in conjunction with a laser diode to detect whether or not an intruder has tripped it. The board features a couple of NE555 timer ICs and a LM358 comparator.

Before recreating this project, watch how I made my original Laser Alarm with bare components here:

"Instatronic Web" was part of making this project possible, a big thanks to him for helping out!
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Check this website out to learn more about the SIM800L GSM module:


Project files:
SIM800L Wire-up/Circuit diagram (With 5V jumper wire):
SIM800L Wire-up/Circuit diagram (With capacitor) :
Alarm Circuit diagram 1:

Alarm Circuit diagram 2:
Project code:

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Components and parts I used to make this upgrade:
(x1) DIY Laser Tripwire Alarm board - from video:
(x1) SIM800L GSM/GPRS Module -
(x1) Arduino Nano -
(x1) 3.7V 1000maH battery/LM2596 DC-DC buck converter - /
(x1)470-560μF capacitor -
(x2) BC547 NPN Transistor -
(x4) 10K Resistor -
(x1) 1K Resistor - (from resistor kit, link above)
Jumper wires -
Jumper wires (short style) -
(x2) Breadboard -

Also watch:
Arduino-based Digital Thermometer;

DIY Police light circuits;

DIY Mini Oscillating desk fan;
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Video chapters:
00:00 Intro
01:21 Tutorial
03:35 Testing and finding solutions
09:20 Trying it out with the Laser
11:09 Outro
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Tags:
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#arduino #alarm #gsm