FK245

LIGHT ACTIVATED ALARM

Categories : Other Sound

This is a low cost and practical demonstration of photo electronics. This circuit will sound an alarm through its included 8 Ohm 0.25W speaker when the on-board photo-transistor is exposed to light. Light sensitivity is adjusted by a trimmer potentiometer.

Technical Specification
  • Power Supply : 12VDC @ 22mA max.
  • Dimensions : 2.38" x 1.24" x 0.6" (plus speaker : 60.5mm x 31.5mm x 15mm)