The following figure shows how to produce a fixed positive voltage at the output by using a fixed positive... Adjustable voltage regulator. Attach the red to the ground and the black wire the output, the multimeter should then give the regulators' output value (plus minus its accuracy). This article was most recently revised and updated by, https://www.britannica.com/technology/voltage-regulator. Voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits. Simple voltage regulator contains a Zener Diode and a resistor but more complicated versions include elements like a voltage reference and error amplifiers. At low speeds, some current from the generator is used to boost the generator’s magnetic field, thereby increasing voltage output. The dropout voltage value will be particularly important with battery applications. Corrections? Low dropout voltage regulators can regulate output voltage even when it's very close to the supply voltage. Turn the dial or press a button on your ohm or multimeter and set it to … Low dropout voltage regulators are types of linear voltage regulators that provide an inexpensive way of regulating output voltage with few external components. Linear regulators are used to maintain a steady voltage in electronic devices. If not then there is a power supply issue. A more specific type of regulator are Low Dropout Voltage Regulators (LDO) which can regulate voltage even when the power supply voltage is very close to the supply voltage. There's a problem loading this menu at the moment. You can change your cookie settings by reading our. Voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits. Two types of regulators are used: step regulators, in which switches regulate the current supply, and induction regulators, in which an induction motor supplies a secondary, continually adjusted voltage to even out current variations in the feeder line. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. In motor vehicles, voltage regulators rapidly switch from one to another of three circuit states by means of a spring-loaded, double-pole switch. Let us know if you have suggestions to improve this article (requires login). Updates? Omissions? Sorry, there was a problem saving your cookie preferences. 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