Simple Meter Impedance speaker Circuit Diagram
A simple impedance meter can be useful to measure the actual impedance of a speaker or headset, ideal for anyone working with sound, making and repairing speakers. This impedance meter works in conjunction with a multimeter or oscilloscope to measure the impedance. Simple Meter Impedance speaker Circuit Diagram How to make the measurement of impedance speaker with the multimeter Connect a digital multimeter to AC voltage in the range of 200mV. Connect the device under test terminals SW1 to R7, if the value of the measured impedance is less than 100 ohm R8 or upwards. With SW2 in the "Set" power-on circuit through SW3 Adjust P1 to read exactly 100.0mV the display DVM Switch SW2 in the "Measure" and read directly from the speaker or headphones impedance value on the display DVM, eg 8.2mV = 8.2 Ohm / 80.1mV = 80.1 Ohm How to make the measurement of impedance speaker with the oscilloscope: Connect the oscilloscope instead of DVM (multimeter) and turn P1 fully clockwis...