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INTRUDER ALERT - light sensor alarm DIY electronics kit - can be used with laser
This listing is for a light sensor based DIY electronics kit that rings out "INTRUDER ALERT" many times consecutively when the device detects a change from light to darkness. It can be interfaced with a store-bought laser pointer so make a fun little laser tripwire alarm system. No laser is included. This kit is extremely easy to put together as long as you have a decent soldering iron, some patience, and at least a little bit of soldering experience. This is one of three kits based around the same platform we offer three variations of this kit:
1) PIR - Motion based
2) Light based - For laser tripwire applications (This listing)
3) Slot sensor based - For door opening/closing applications
The video above not only goes through the assembly process step by step, but shows you demonstrations of each of the three variations of this kit that you can purchase. The main board is identical, which small software tweaks. It has been designed tin interface with the sensor module of your choice; where it be light based, PIR based, or slot sensor based. Just skip to the latter end of the video for the demonstrations.
How It Works (PIR Motion Detector // Demonstration at 9:07 in the video):
Please note that the battery was dying at this time in the video, and the alert was low pitched and quiet. This is not how the device normally functions. When you power up this device, the device waits for the PIR module to become. Depending on the calibration of the PIR module (Talked about in just a minute), there may be one false trigger after you power the device on. After that, as long as you aren't near the PIR sensor, it should stay idle until someone walks within the PIR module\s field of view; at which point the alarm will sound "INTRUDER ALERT INTRUDER ALERT... INTRUDER ALERT", and so on. After blaring the alarm for several seconds, as long as you've left the room again, the device should go idle again, and start scanning for another breach. The best way to understand the functionality is to watch the second half of the video. The first half concentrates on the assembly. It really is plug and play. After you've built it, as long as you don't have the variable resistors on the PIR module turned all the way right or left, you should be able to leave the room, and when the next person walks in (Assuming that person is in the field of view of the PIR module), the alarm should sound. Of course, it may take some fiddling and calibrating, but it is easy to do.
How It Works (Light Sensor - This listing // Demonstration at 12:01 in the video):
Before you power up your device, fix a laser beam on the light sensor. Of course, you don't have to make a laser tripwire out of this. You can make it so that when the sensor is exposed to darkness, the alarm will sound. Of course, if you do want to make a laser tripwire alarm, what you should do is fix a store bought laser pointer to the light dependent resistor (LDR) on the light sensor board. Once the laser is fixed on the LDR, apply a 9v battery as a power supply, and turn out the lights. As long as you have assembled the unit properly, when the laser is breached, the alarm should sound "INTRUDER ALERT INTRUDER ALERT... INTRUDER ALERT", and so on. If it does now, check your battery. Also, there is a variable resistor on the light sensor board. This configures sensitivity. If your unit is giving you trouble, set this resistor to the half way mark. This should fix any issue that you might have (If any).
Now you have a fun laser tripwire based intruder alarm!
How It Works (Slot Sensor // Demonstration at 13:40 in the video):
This is easily the most simple version. Simply mount the slot sensor module to a door, and ensure that something is breaching the middle of the slot sensor (Please see the above video if this does not make sense to you. Whether you powered the device up before or after you've done this will not matter. You can power it up, then close the door and nothing will happen. When the door opens again, and the path to the slot is no longer breached, the alarm will go off! Plain and simple.
Mounting:
There are four mounting holes on the main board, and the kit comes with a 9v battery connector. No batteries are included with this kit.
What Is Included:
1x Light sensor module with 3x female-to-female connectors for interface between the light sensor module and the main controller board.
1x 9v battery connector (Battery not included)
1x main controller board DIY electronics kit which includes all components needed for assembly
1x 0.5W 8 Ohm speaker
Please note that no hard copy of the schematic is included.
If you have any questions at all, please do not hesitate to ask! Please make sure to watch the video! Thanks for taking an interest!
1) PIR - Motion based
2) Light based - For laser tripwire applications (This listing)
3) Slot sensor based - For door opening/closing applications
The video above not only goes through the assembly process step by step, but shows you demonstrations of each of the three variations of this kit that you can purchase. The main board is identical, which small software tweaks. It has been designed tin interface with the sensor module of your choice; where it be light based, PIR based, or slot sensor based. Just skip to the latter end of the video for the demonstrations.
How It Works (PIR Motion Detector // Demonstration at 9:07 in the video):
Please note that the battery was dying at this time in the video, and the alert was low pitched and quiet. This is not how the device normally functions. When you power up this device, the device waits for the PIR module to become. Depending on the calibration of the PIR module (Talked about in just a minute), there may be one false trigger after you power the device on. After that, as long as you aren't near the PIR sensor, it should stay idle until someone walks within the PIR module\s field of view; at which point the alarm will sound "INTRUDER ALERT INTRUDER ALERT... INTRUDER ALERT", and so on. After blaring the alarm for several seconds, as long as you've left the room again, the device should go idle again, and start scanning for another breach. The best way to understand the functionality is to watch the second half of the video. The first half concentrates on the assembly. It really is plug and play. After you've built it, as long as you don't have the variable resistors on the PIR module turned all the way right or left, you should be able to leave the room, and when the next person walks in (Assuming that person is in the field of view of the PIR module), the alarm should sound. Of course, it may take some fiddling and calibrating, but it is easy to do.
How It Works (Light Sensor - This listing // Demonstration at 12:01 in the video):
Before you power up your device, fix a laser beam on the light sensor. Of course, you don't have to make a laser tripwire out of this. You can make it so that when the sensor is exposed to darkness, the alarm will sound. Of course, if you do want to make a laser tripwire alarm, what you should do is fix a store bought laser pointer to the light dependent resistor (LDR) on the light sensor board. Once the laser is fixed on the LDR, apply a 9v battery as a power supply, and turn out the lights. As long as you have assembled the unit properly, when the laser is breached, the alarm should sound "INTRUDER ALERT INTRUDER ALERT... INTRUDER ALERT", and so on. If it does now, check your battery. Also, there is a variable resistor on the light sensor board. This configures sensitivity. If your unit is giving you trouble, set this resistor to the half way mark. This should fix any issue that you might have (If any).
Now you have a fun laser tripwire based intruder alarm!
How It Works (Slot Sensor // Demonstration at 13:40 in the video):
This is easily the most simple version. Simply mount the slot sensor module to a door, and ensure that something is breaching the middle of the slot sensor (Please see the above video if this does not make sense to you. Whether you powered the device up before or after you've done this will not matter. You can power it up, then close the door and nothing will happen. When the door opens again, and the path to the slot is no longer breached, the alarm will go off! Plain and simple.
Mounting:
There are four mounting holes on the main board, and the kit comes with a 9v battery connector. No batteries are included with this kit.
What Is Included:
1x Light sensor module with 3x female-to-female connectors for interface between the light sensor module and the main controller board.
1x 9v battery connector (Battery not included)
1x main controller board DIY electronics kit which includes all components needed for assembly
1x 0.5W 8 Ohm speaker
Please note that no hard copy of the schematic is included.
If you have any questions at all, please do not hesitate to ask! Please make sure to watch the video! Thanks for taking an interest!