This tiny circuit telephone receiver circuit is easy to build and is an excellent classroom project to learn about the fundamentals of the operation of a telephone handset. The FK310 is very efficient and needs no external power supply. The kit comes complete with a miniature earphone bud and on-board microphone.

Technical Specification

• Power Supply : Not required.
• PCB Dimensions : 2.59" x 1.72" x 0.6" (65.8mm x 43.7mm x 15mm)

Download User Manual