Project 15 out of 18
Create a device that can sense if an item has passed through a laser pointer.Order Now
Make the Security Center you’ve been building over the last few projects more advanced by adding another level. Use a laser diode that will combine with a light-dependent resistor to detect if someone walks through the laser beam. This information will get sent to the Wireless Control Center that you built in the last project. First, you’ll build a new wireless node with a laser beam and an LDR. To create the Laser Tripwire, you’ll use the laser diode to shine a beam into a mirror, which will direct the laser beam back to the LDR. If the laser beam is broken, the LDR will detect it. You’ll reprogram the Wireless Control Center to receive signals from both transmitters with the same radio. Then, build the Laser Tripwire Transmitter and program it to make it work. Now you have a fully operational Security System that can detect intruders in different ways.
What you'll receive in the Laser Tripwire Transmitter project kit:
Light Dependent Resistor
Jumper Wires M-F: 20cm (10, 2 extra)
Jumper Wires M-M: 10cm (2, 2 extra)
Jumper Wires M-M: 20cm (3, 2 extra)
Continue your understanding of new hardware, its practical applications, and how to program it.
Electronic Components. Learn about laser diodes and how to implement them in your project.
Circuitry. Follow along with the detailed diagram in the Online Classroom to connect your hardware.
Programming. Hone your C++ skills. Reprogram your Wireless Control Center and write the code for the Laser Tripwire.
Finish your Laser Tripwire Transmitter project kit by completing the following exercises to solidify your understanding of laser diodes.