The FK401 is an excellent project for class demonstration of the operation of a photo transistor. Working on the principle of ambient light falling on the light sensitive junction of a photo transistor operating a relay through an amplifier, the FK401 embodies three basic elements of electronics in an economical, easy-to-build circuit and the outcome is practical and tangible.

Technical Specification

• Power Supply : 12VDC @ 46mA max.
• Maximum Contact Load : 10A @ 125VAC and 5A @ 220VAC.
• PCB Dimensions : 1.29" x 2.36" x 0.8" (32.8mm x 60mm x 20mm)

Download User Manual