What is the purpose of the 10k resistor in the circuit?

This Resistor controls the collector current passing in the transistor and affects the bais point . So according to the specific amplification (GAIN) the designer wanted has choosen this resistor to be 10k using the basic transistor equations.

What does 10k resistor mean?

If you had a 10K Ohm resistor, you would have 6/10,000 amperes of current flowing in the circuit. A 10k ohm resistor has 4 color bands: brown, black, orange, and gold for 5% tolerance, respectively. A 1k ohm resistor has 4 color bands: brown, black, red, and gold for 5% tolerance, respectively.

How does a resistor work?

A resistor works by restricting the flow of current, it can do this in one of three ways: firstly, by using a less conductive material, secondly by making the conductive material thinner and finally by making the conductive material longer. You can clearly see the carbon spiral that gives the resistor its resistance.

What is the cost of 10K resistor?

Deepak Enterprise 10k OHM 1/4w 5% carbon film resistor – Set of 100 Resistance

What happens when current goes through a resistor?

The current after a resistor is the exact same as it was before the resistor. If you now add a resistor in series into this circuit – the current of the circuit will be smaller. So yes, the resistor does reduce the current. (But the current flowing into the resistor is still the same as the current flowing out.)

What does a low side transistor switch mean?

Low-side transistor configuration When the transistor is connected to ground, that means the load is between +V and the transistor. Since the transistor is switching the path to ground or is sitting on the low side of the load, it is called a low side switch. Typically these use an NPN BJT or an N-Channel MOSFET.

When to use high side or low side switch?

So when you have a load that requires ground, you NEED to use a high-side switch. As a quick rule of thumb, if you are turning a device on and off, a low-side switch is a simple solution. However, if you are delivering power to an entire circuit or a voltage sensitive device, then you want to use a high-side switch.

How are the pull up and pull down resistors connected?

By using these two pull-up resistors, one for each input, when switch “A” or “B” is open (OFF), the input is effectively connected to the +5V supply rail via the pull-up resistor.

When to use a high side transistor driver?

Until the FET is saturated, its Rds-ON can be relatively high, limiting the maximum current it can handle. It is very common to use an NPN driver with a PNP BJT or P-Channel MOSFET, when the load voltage is higher than the signal voltage. Without a driver, the transistor may never turn-off.

What is the purpose of the 10K resistor in the circuit?

This Resistor controls the collector current passing in the transistor and affects the bais point . So according to the specific amplification (GAIN) the designer wanted has choosen this resistor to be 10k using the basic transistor equations.

What does a 47K resistor do?

the 47K resistors and the capacitors form RC circuits that charge C1 and C2 and provide the timing and the base current to turn on the transistors that discharge C1 and C2 in turn. Remove them and it won’t oscillate. Both LEDs will be off.

Why are there 1K and 10K resistors in my circuit?

The 1K resistors limit how much current flows through the LEDs so they don’t blow. The 10K resistors limit how much current flows into the capacitors, setting the “time constant” of the charging of the capacitors. This combination of resistor and capacitor is what sets how fast the LEDs flash.

Which is the most common type of resistor?

Resistors are made from materials like copper or carbon, which make it difficult for the electrical charges to flow through a circuit. The most common type of resistor is a carbon resistor, which is a general purpose resistor, best suited for lower-powered circuits.

How does a pull up resistor work in a logic gate?

With a pull-up resistor connected, the output still works in the same way as a normal logic gate in that when the output transistor is OFF (open), the output is HIGH, and when the transistor is ON (closed), the output is LOW. Thus the transistor turns ON to pull the output to a LOW level.

What should the resistive value of a pull up resistor be?

Reducing the resistive value further, will produce a smaller voltage drop but increase the current. Then we can see that while there may be a maximum allowable resistive value, the resistance value for pull-up resistors is not usually that critical with resistance values ranging from between 10k to 100k ohms acceptable.