So do check the manufacturer’s datasheet. However, not all transistors use this configuration. Typically with these resin body type transistors with the flat edge, the left pin is the emitter, the middle is the base, and the right side is the collector. This stands for the emitter, the base and the collector. Now, with a transistor we have three pins labelled E, B and C. The two transistors look nearly identical, so we need to cheque the part number to tell which is which. We have two main types of bipolar transistors, the NPN and the PNP type. Scroll to the bottom to watch the YouTube tutorial. What is the difference between an NPN and a PNP transistor. If you like this post probably you might like my next projects, so please support me by subscribing my blog and like my Facebook Page.NPN and PNP transistors explained. Thanks for reading, you can contact me by leaving a comment. And as you decrease voltage to the base of a NPN transistor, the transistor turns on less and less, until the voltage is so low, the transistor no longer conducts across emitter to collector, and shuts off. When you increase voltage to the base of a NPN transistor, the transistor is turned on more and more until it conducts fully from emitter to collector.A NPN transistor conducts from emitter to collector.And as you decrease voltage to the base of a PNP transistor, the transistor turns on more and more, until the transistor fully conducts from collector to emitter.When you increase voltage to the base of a PNP transistor, the transistor is turned off more and more until it no longer conducts and completely shuts off.A PNP transistor conducts from collector to emitter.The difference between a PNP transistor and a NPN transistor is their polarity and their actions are reversed… PNP Transistor (you should see my project after reading this post) I’ve decided to write this post to support a bit of the theory behind my new project that identifies the PNP and NPN transistors easily.
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