Building a Dark Detector Kit

Building a Dark Detector Kit

Building a Dark Detector Kit

Regular price $30.49

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).



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Merlan Scientific warrants that each product will be free of defects in materials and workmanship for a period set forth in its published user manuals for its system products and for a period of one (1) year for its component products. The warranty commences on the date the product is shipped by Merlan Scientific. Merlan Scientifics’ sole liability and responsibility under this warranty is to repair or replace any defective product, which is returned to it by the buyer, and which Merlan Scientific determines qualifies for repair or replacement under the terms of the applicable warranty. The product returned to Merlan Scientific for warranty service will be shipped to Merlan Scientific at the buyers expense and will be returned to buyer at Merlan Scientifics’ expense. In no event shall Merlan Scientific be responsible under its warranty for any defect, which is caused by negligence, misuse or mistreatment of a product, or for any unit, which has been altered or modified in any way. The warranty of repaired and replacement products shall terminate with the original warranty of the product.

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