TRANSISTOR. Switch and linear modes. Calculating a switch on a bipolar transistor and MOSFET.
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0:00 The Transistor and Its Role in the Life of a Modern Radio Amateur
0:50 Who Invented the Name Transistor? Can a Transistor Amplify Voltage?
1:59 Why Do We Need a Transistor and What Can It Do? Load Switching: Transistor or Relay?
3:13 Bipolar and Field-Effect Transistors. Bipolar Transistor Structure. P-N Junctions.
4:06 Field-effect transistor. Electric field effect. MOSFET and FET – the same thing?
4:56 Transistor model. Switch, resistor, variable resistor
5:42 Transistor saturation. Operating state. Voltage drop and heating
6:36 Transistor linear mode. Heat generation. What are the advantages and disadvantages of linear mode?
8:10 Why is PWM so popular?
8:26 Transistor switching mode. The concepts of "on" and "off".
9:07 How does a real transistor work? Base, emitter, collector.
9:45 How to properly connect a transistor? Direction of the emitter arrow, connecting the load to the collector.
10:58 Connecting a load with a common positive and common negative.
11:34 Forward and reverse conducting transistors. PNP and NPN. P-channel and N-channel field-effect transistors. Differences.
12:45 How to connect a transistor to an Arduino? A key for a high-power LED. Connection and calculation.
14:04 Current gain. Base current, collector current. Symbols and calculations.
16:13 Powering a load from a higher voltage. Base-emitter junction opening threshold.
17:12 What is an open collector?
18:17 How to connect a MOSFET as a switch? Why do you need a resistor in the gate? Advantages of a MOSFET when switching a load.
20:19 Practical experiment. Finding an NPN transistor on the board.
20:57 How to find the base of a transistor?
21:36 How to determine the pinout of a transistor? Base-collector and base-emitter junction voltages.
22:18 How to check if a transistor is working properly?
22:34 Finding the datasheet for a transistor. Reading the datasheet.
23:20 Gain. How to find it in the datasheet? What does the letter in the transistor designation mean?
23:38 Connecting an LED to an Arduino via a transistor switch. Calculating the switch.
24:30 Uploading the program, connecting the circuit to the Arduino, and testing its operation.
24:55 Connecting a high-power LED to an Arduino via a MOSFET switch. Why is a resistor needed in the MOSFET gate?
26:01 Connecting a MOSFET circuit to an Arduino and seeing how it works.
26:15 Compound Darlington Transistor
26:57 Emitter Follower. Purpose and Use.
27:33 Common Base Circuit.
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