Cheap AC Current Measurement

The easy way to measure high AC currents is to use a clamp meter but these are generally quite expensive and cost several hundred dollars at a minimum. Add-on clampmeter adaptors can work well but they only work with digital multimeters which have millivolt AC resolution. This is because the output of most clamp adaptors […]

High Side Current Measurements

It’s always a bit difficult to measure the current in the positive lead of a power supply, such as a battery charger. Fortunately, special ICs have been developed for this purpose in the last few years, such as the Burr-Brown INA138 and INA168. These ICs have special internal circuitry that allows their inputs to be […]

Measuring Inductors

Often you find yourself in the position of needing to wind your own coil for a project, or maybe you come across an unmarked coil in the junk-box. How can you best find out its inductance? An oscilloscope is all you need. Construct a resonant circuit using the coil and a capacitor and connect it […]

RF Multi-Measurement Signal Analyzer

RF Multi-Measurement Signal Analyzer Agilent Technologies Inc. announced that an innovative, new multi-measurement capability is being added to its 89600 VSA software, enabling simultaneous signal analysis of multiple carriers and signal formats for more efficient testing and deeper signal insight in wireless test. With wireless R&D and manufacturing engineers increasingly working with more than one […]