FK307

BUSY TELEPHONE INDICATOR

Categories : Telephone Status

It's annoying to have your telephone call interrupted by someone picking up an extension phone and it can be embarrassing to accidentally pick up a line that is engaged. The low cost easy-to-build FK306 circuit has a bright LED that shows clearly when a line is picked up.

Technical Specification

  • Power Supply : 3VDC @ 10mA.
  • PCB Dimensions : 1.51" x 0.91" x 0.6" (38.35mm x 23.11mm x 15mm)
  • Recommended Housing : FB17