Transistors Explained - How transistors work

this is a transistor is one of the most important devices ever to be invented so we're going to learn how they work in detail in this video transistors come in many shapes and sizes there are two main types the bipolar and the Field Effect we're going to mostly focus on the bipolar version in this

video transistors are small electronic components with two main functions it can act as a switch to control circuits and they can also amplify signals small low power transistors are enclosed in a resin case to help protect the internal parts but higher power transistors will have a partly metal case which is used to help remove the

heat which is generated as this will damage the components over time we usually find these metal body transistors attached to a heatsink which helps remove The Unwanted Heat for example inside this DC bench power supply we have some mosfet transistors which are attached to very large heatsinks without the heatsink the components quickly reach 45 degrees Celsius or 113

degrees Fahrenheit with a current of just 1.2 amps they will become much hotter as the current increases but for electronic circuits with small currents we can just use these resin body transistors which do not require a heatsink on the body of the transistor we find some text this will tell us the part number which

we can use to find the manufacturer's datasheet each transistor is rated to handle a certain voltage and current so it's important to check these sheets now with a transistor we have three pins labeled e b and c this stands for the emitter the base and The Collector typically with these resin body type transistors with a flat Edge