Gikfun Transistor Power Triode Bag 11 Kinds Each 10 for Arduino EK2092

welcome the subject of this video is using PNP transistor switches with microcontrollers such as arduino pic and etc I'm your host Luis Laughlin visit my website at www.starballroomdancestudio.com and a common negative a quick note on PN junctions that is positive negative semiconductor junctions particularly silicon which is what we will be dealing with extensively when forward bias that is the anode is positive and the cathode is negative it will conduct a current and you will have a voltage drop from between 0.5 to 0.7 volts if you connect the negative to the anode and the positive to the cathode it will be open there will be no conduction it's like somebody opened the switch bipolar transistors come in two main types NPN and PNP in the case of a PNP which is our subject here like the NPN it's a three pen device but the electrical polarity is opposite mostly we're going to be using t