The Digital Clam Multi Meter is an Electrical Device. This device use for Check AC and DC current , Ampere , Volts and Resistance Continually. We can also check VOM (volt-ohm-milliammeter), This Device use mostly people who work Electronics.
Multimeters were invented in the early 1920s as radio receivers and other vacuum tube electronic devices became more common. The invention of the first multimeter is attributed to British Post Office engineer, Donald Macadie, who became dissatisfied with the need to carry many separate instruments required for maintenance of telecommunications circuits. Macadie invented an instrument which could measure amperes (amps), volts and ohms, so the multifunctional meter was then named Avometer. The meter comprised a moving coil meter, voltage and precision resistors, and switches and sockets to select the range.
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