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Building a Dark Detector Kit

Item # 754032 Online Only This product is not available in our print catalog.

Grades 9–12. In this classic introduction to transistors, students build their own functioning night-light (dark detector) using LEDs, a transistor, a light-dependent resistor (LDR), and resistors. With this kit and free downloadable Carolina Essentials™ activity guide, students can learn about light sensors, LEDs, LDRs, semiconductors, and more.

Price

$15.95

In stock and available to ship.

Grades 9–12. Students build their own functioning night-light (dark detector) using LEDs, a transistor, a light-dependent resistor (LDR), and resistors in this classic introduction to transistors. Using this kit and free downloadable Carolina Essentials™ activity guide, students can learn:

  • How electronic light sensors operate
  • How LDRs control current flow, how LEDs demonstrate characteristics of semiconductors, and how both devices rely on the photoelectric effect
  • How NPN transistors function, with their 3 elements acting as a solid-state switch

Reference several phenomena during your lessons on electricity using this great piece of tech. Click the Resources tab to view and download the Carolina Essentials™ activity guide, Energy Transformations in a Dark Detector. Kit materials support 1 to 3 students. To further explore circuits, the photoelectric effect, and other related phenomena, see the Determining Planck's Constant with LEDs: Investigating the Photoelectric Effect and Electronic Light Sensors Kit (item #754030).

  • This item is only available at Carolina.com.
 
Components Qty Included?
Mini Breadboard 1 Included
D Battery Holders 2 Included
Resistor, 330 Ω 1 Included
Resistor, 470 Ω 1 Included
Resistor, 10 kΩ 1 Included
Resistor, 100 kΩ 1 Included
NPN Transistor 1 Included
LED, Red 1 Included
Light-Dependent Resistor (LDR) 1 Included
Wire, 22 Gauge (item #972626) 1 Needed, Not Included
Wire Stripper (item #756525) 1 Needed, Not Included
D Batteries (item #756317 or #756336) 2 Needed, Not Included
Alligator Clip Leads (item #756521) 2 Needed, Not Included