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How to calculate the collector voltage of a transistor?
Find the collector voltage VC. It should be approximately midway between VCC and ground. The closest standard value to the 460kΩ collector feedback bias resistor is 470kΩ. Find the emitter current IE with the 470KΩ resistor. Recalculate the emitter current for a transistor with β=100 and β=300.
What kind of resistor do I need for a switching calculator?
For switching applications, a ¼-watt resistor with 5-% tolerance usually works fine. In order to use this calculator, you will need to know the input switching voltage (Vi), supply voltage Vcc, and the load current iL. Use the Standard Resistor Values chart to find the nearest standard resistor value.
How to calculate base resistor for Arduino transistor?
This seems to be in the OK area for these transistor types. It appears that you intend to drive the base from a 5V signal. With a nominal Vbe of 0.7V that leaves you with a 4.3V drop across the base resistor. Resistance to limit current to 5.32mA at 4.3V is approximately 800 ohms. Use an 820 ohm standard value base resistor.
What’s the resistance of a 5V transistor?
This seems to be in the OK area for these transistor types. It appears that you intend to drive the base from a 5V signal. With a nominal Vbe of 0.7V that leaves you with a 4.3V drop across the base resistor. Resistance to limit current to 5.32mA at 4.3V is approximately 800 ohms.
How to select resistor values in electronic circuits?
V = R/I, where V is the voltage produced across the resistor, R is the resistor in Ohms and I is the current passing by way of the resistor in Amps. Let’s think as an illustration, a 1 amp current is passed by way of a 2 ohm resistor, resolving this in the above formula delivers:
Can a transistor be used as a constant current source?
Often these constant current sources use transistors, although FETs and where applicable, vacuum tunes of thermionic valves can be used as well. It is possible to make an active constant current source using a single transistor, although more comprehensive designs are also available using additional components.
How to find the base resistor of a BJT?
The formula for examining the base resistor of a BJT can be watched below: R = (Us – 0.6).Hfe / Load Current, Where R = base resistor of the transistor, Us = Source or the trigger voltage to the base resistor, Hfe = Forward current gain of the transistor.