• 2007
    • 八月
      • Full-duplex Intercom
        08/13/07
        Circuit diagram:


        Parts:

        P1_____________22K Log. Potentiometer

        R1_____________22K 1/4W Resistor
        R2,R3_________100K 1/4W Resistors
        R4_____________47K 1/4W Resistor
        R5______________2K2 1/4W Resistor (See Notes)
        R6______________6K8 1/4W Resi

    • 六月
    • 五月