Darlington Pair Circuit. This circuit is a simple water level indicator wherein darlington pair is used as a switch. The darlington pair circuit finds many applications as the series pass element in a linear regulator.
When the water level is not enough to close the sensor darlington transistor is in off state. This circuit is a simple water level indicator wherein darlington pair is used as a switch. Darlington pair allows users to drive more power applications by few milliamp of current source from micro controller or low current sources.
It consists of two bipolar transistors that are connected in such a way that the current amplifies by the first transistor then by the second transistor.
In these circuits the darlington pair may be a single device containing the integrated darlington or they can be circuits that are made from the discrete transistors. Uln2003 is a chip widely used in electronics which provide high current darlington arrays with seven open collector output. In electronics a multi transistor configuration called the darlington configuration commonly called a darlington pair is a compound structure of a particular design made by two bipolar transistors connected in such a way that the current amplified by the first transistor is amplified further by the second one. Unlike single transistors darlington pair circuit has slower response times and have twice the base to emitter voltage drop 1 2 v instead of 0 6 v as compared with single transistors.
