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In general, the primary and secondary windings in a transformer possess the same amount of inductance. This means that there is equal voltage and current levels in both circuits. There are circumstances, however, when voltages don’t match. For example, imagine that your electricity runs at 220 volts, but you have a 120V device, which is…

Common Mode Choke The impedance of an inductor is proportional to its inductance and the frequency of the signal passing through it.  Inductors, therefore, can act like low-pass filters, that is they allow low frequency signals to pass through them, while they block higher frequency signals.  A common mode choke is a special type of…

Whether you need a standard, off-the-shelf power supply or a custom designed unit for a specialty application, there are some key pieces of information you will want to consider as you make your switching power supply choice. At CET Technology, we offer both standard and custom power supplies and are happy to help you find…

The Restriction of Hazardous Substances, or RoHS, is a means of controlling or limiting specific substances when manufacturing electrical and electronic equipment (often abbreviated EEE). This set of compliance laws first went into effect 7 years ago, and revisions to the original regulations have been underway for over 5 years and were finally implemented into…

Use of transformers and inductors in the electrical realm is such common practice that it’s hard to imagine a world without these devices. When the property of inductance was discovered in the 1830s by Joseph Henry and Michael Faraday (separately and on different continents), technology was revolutionized. Inductance was first found by Faraday in a…