Reduce voltage with resistor

Рет қаралды 149,707

ElectroFixTips

Күн бұрын

Пікірлер: 77

@mosiala5066 Жыл бұрын

How is the current passing through several resistors in series calculated?

@electrofixtips Жыл бұрын

1. Calculate the total resistance of the series circuit by adding the individual resistances of the resistors together. Let's call this value Rt. 2. Apply Ohm's law to calculate the current through the circuit. The voltage across the circuit is equal to the voltage of the power source, and the resistance of the circuit is equal to the total resistance of the series resistors. Let's call the current through the circuit I. I = V / Rt 3. Since the resistors are in series, the same current flows through each resistor. Therefore, the current through each resistor can be calculated using Ohm's law and the voltage drop across each resistor. I1 = V1 / R1 I2 = V2 / R2 I3 = V3 / R3 . . . where V1, V2, V3, etc. are the voltage drops across each resistor. It is important to note that the voltage drops across each resistor can be calculated using the voltage divider rule, which states that the voltage across a resistor in a series circuit is proportional to its resistance. The voltage divider rule can be useful in cases where the voltage supplied to the circuit is divided among the series resistors.

@maniBabi-mi3yg Жыл бұрын

Excellent

@user-2uf2kr2c 3 ай бұрын

Hello, you forgot to wipe the solderflux off your finger the last time....🤣🤣

@electrofixtips Ай бұрын

😀

@garymucher4082 Жыл бұрын

True you made a voltage divider. However, unless anything you plan to use the voltages for is really very little current drain, those resistors will burn open... Take the input voltage and divide the resistor(s) value(s) into that voltage, you will see the current capability. And than the wattage of each resistor needs to be high enough to handle that current...

@electrofixtips Жыл бұрын

Dear garymucher thanks for comment Series resistors have an educational aspect and two resistors with suitable power can be used to reach the desired voltage

3 ай бұрын

Good tip! Thank you. I'm quite new to electronics, starting to learn now, and this must be a stupid question. Sorry. I have a 230VAC to 12VAC little transformer and I need reduce it to 9VAC. Would your project work in this case (AC to AC), or it works only for DC/DC? Thanks again.

@scudbucket_ Ай бұрын

Yeah it will work just do the math to figure out what size resistors you need.

@electrofixtips Ай бұрын

You can add a resistor in series with the load to drop the voltage. However, this method is inefficient as it dissipates power as heat. Use Ohm's Law (V = IR) to calculate the required resistance. For example, if your load draws 100mA, the resistance needed to drop 3V (12V - 9V) would be R = V/I = 3V / 0.1A = 30 ohms. You can use a voltage divider circuit with two resistors to divide the voltage. Calculating Resistor Values: The voltage divider formula is Vout = Vin * (R2 / (R1 + R2)). You can choose suitable resistor values based on this formula.

Ай бұрын

@@electrofixtips Thanks a lot.

@electronicshelpcare Жыл бұрын

We also can use diode. every diode can reduce 0.7 voltage

@electrofixtips Жыл бұрын

yes very good❤ please watching this video: kzbin.info/www/bejne/mp2ZgqN5ls-Fndk

@adinehbabaei89 Жыл бұрын

👌 thanks

@kuavivo8061 Жыл бұрын

Hi boss! Ilove ur video but as a newvie what is the wattage of 100ohms resistor u use? Thanks and more power! 👍

@kuavivo8061 Жыл бұрын

@@electrofixtips thank you very much! ❤

@ShadiArad-gn7bx Жыл бұрын

Good job

@LheodaDjTechTv Жыл бұрын

Nice sharing

@MohamedAshraf-bt3vc 6 ай бұрын

Good Information Thank U

@electrofixtips 6 ай бұрын

Thank you so much for taking the time to share your thoughts. I really appreciate it!

@HamidGhasemi-zu1ps 5 ай бұрын

Good

@electrofixtips 4 ай бұрын

Thanks

@davaoshipmodeller Ай бұрын

I am an absolute Zero when it comes to electronic ! So I have 7.4 V 6000mah Lipo Battery and I want to run a 6 V Motor which I don't know how many Amperes he pules ( it's a 380 brushed motor in a Ship Model ). Would the simple 100 ohm Resistor survive that or do I need something different / bigger / with cooling ??? As said I have no Idea

@electrofixtips Ай бұрын

Resistors are not designed to handle the kind of current a motor draws, especially a motor that's pulsing. Using a resistor to power a motor is highly inefficient and can lead to overheating and damage to both the resistor and the motor. A voltage regulator is a much better solution for powering your 6V motor from a 7.4V battery. It will efficiently reduce the voltage to 6V while supplying the necessary current to the motor.

@davaoshipmodeller Ай бұрын

@@electrofixtips thank you

@mrkeopele 11 күн бұрын

so, can I hook the red and black to a 5w solar panel rated at 17 volts and just tap off the resistor i want to charge my 4.3 outdoor light so i never have to remove the batteries to charge it again. is the panel going to be fine circulating that current through the resistors?

@macropacro Жыл бұрын

Is it possible to reduce the voltage with a series diode?

@electrofixtips Жыл бұрын

Yes, it is possible to reduce the voltage with a series diode. However, it is not a very efficient way to do it, and it is not recommended for most applications. When a diode is forward biased, it has a voltage drop of about 0.6 volts for silicon diodes and 0.3 volts for germanium diodes. This means that if you connect a diode in series with a power supply, the voltage at the output of the diode will be reduced by the diode's forward voltage drop. For example, if you connect a silicon diode in series with a 12 volt power supply, the voltage at the output of the diode will be about 11.4 volts. If you connect two silicon diodes in series, the voltage at the output will be about 10.8 volts, and so on. The main problem with using a series diode to reduce voltage is that the diode's forward voltage drop is not constant. It varies depending on the current flowing through the diode. This means that the output voltage of the circuit will also vary depending on the current draw. Another problem with using a series diode is that it wastes power. The diode's forward voltage drop is dissipated as heat. This means that the power supply has to provide more power than the circuit actually needs. For these reasons, it is not recommended to use a series diode to reduce voltage for most applications. There are better ways to do it, such as using a voltage regulator or a resistor divider. However, there are some cases where using a series diode to reduce voltage may be acceptable. For example, it may be used in a low power circuit where the power loss is not significant.

@adrianionut1589 2 ай бұрын

So if I want to reduce the voltage from 120v to 40v how many resistors do I need?

@electrofixtips Ай бұрын

These electrical components oppose the flow of current. By adding a resistor in series with your load (the motor in your case), you can drop the voltage across the load. Ohm's Law: This fundamental law of electricity states that V = IR, where V is voltage, I is current, and R is resistance. To calculate the required resistance, you'll need to know the current your motor draws. Let's assume your motor draws 1 Ampere at 40V.

@DayanaKj-mq9kq Жыл бұрын

Professional

@JanCary-on2ed Жыл бұрын

Thanks a lot

@player-mz1tp 7 ай бұрын

I what to buy a big resistor pack do you know what I'm looking for cuz I don't

@electrofixtips 7 ай бұрын

You can use 1 watt resistors🌹

@AlexandraJimi-gc9sn Жыл бұрын

Great

@Red_Whitenblu 7 ай бұрын

So just put a 100k resistor for every .25% voltage you want rediced?

@electrofixtips 7 ай бұрын

Suppose you want to reduce the voltage (V_total) by half. In this case, you'd choose R_out to be equal to the total resistance of the two resistors connected after the tap point (assuming resistors are arranged sequentially). Therefore, R_out = 2 resistors * 100 kΩ/resistor = 200 kΩ Using the voltage divider formula: V_out = (200 kΩ / 400 kΩ) * V_total = (1/2) * V_total This will give you an output voltage (V_out) that's half of the original voltage (V_total).

@syedraufurraheemjaffrey2616 Жыл бұрын

Ooo I am very glad to witness the discovery of a thing people will call a voltage divider in future 😂😂😂😂

@electrofixtips Жыл бұрын

Dear seyedrauf🌹 thanks for comment❤ The use of a voltage divider with four series resistors of 100 ohms can be a good or bad choice depending on the specific application and requirements. A voltage divider is a simple and commonly used circuit that can be used to obtain a lower voltage from a higher voltage source. The voltage divider circuit using four series resistors of 100 ohms can be a good choice if the input voltage is relatively constant, the output voltage is not required to be very precise, and the load impedance is relatively high. However, there are some potential issues with using a voltage divider for certain applications. One of the main issues is that the output voltage of a voltage divider circuit may vary with changes in the load impedance. The output voltage may also be affected by changes in the input voltage, temperature, and other factors. Additionally, the voltage drop across each resistor in the voltage divider circuit can generate heat, which can be a concern in high-power applications. In summary, the use of a voltage divider with four series resistors of 100 ohms can be a good or bad choice depending on the specific application and requirements.🌹

@RC-Heli835 10 ай бұрын

Would it be possible to use this method to reduce the voltage of a 24V AC transformer down to 14V to charge a car battery?

@electrofixtips 10 ай бұрын

Hi dear friend😊 Unfortunately no Use an AC to DC converter

@timoteo5244 Жыл бұрын

Para pelar los cables el alicate se usa del otro lado

@andystocks3252 28 күн бұрын

Saw your skill in soldering but, the wiring up to the meters wasn’t well explained and needed a diagram.

@pedromunozlopez9900 Жыл бұрын

Por favor explicalo en castellano , gracias de Chile 6:22

@electrofixtips Жыл бұрын

Reducción de voltaje con resistencia Mediante 4 resistencias de 100 ohmios y voltaje de entrada de 12 voltios, crea voltajes de aproximadamente 3, 6 y 9 voltios En este video se usan 4 voltímetros simultáneamente Compare instantáneamente el voltaje de entrada con otros 3 voltajes resistencia 👉 100 ohmios *4 cable y voltaje variable de entrada

@JesusRodriguez-kv4co 8 ай бұрын

Ok, I will comment since I noticed a few things and have been doing some math to fill in the gaps. However, I noticed that the resistors were not all facing the same direction for this video.

@electrofixtips 8 ай бұрын

the resistance of a material itself does not have a direction. It opposes the flow of current equally regardless of which direction the current flows through the material. This is because resistance is a property of the material itself, like its length, width, or conductivity. However, when analyzing circuits, we often refer to a direction of current flow. This is a convention to simplify calculations and circuit analysis. It doesn't affect the resistance value itself.

@mihaixmusic Жыл бұрын

Only able for lets or very low consumption if not that resistor will burn 😂

@dobalga260 Жыл бұрын

Como se puede utilizar?

@LakhsTsoyknikas Жыл бұрын

RESISTOR VOLTAGE DIVIDER WOW

@electrofixtips Жыл бұрын

Your feedback is highly appreciated. Thank you for your comment

@ahmadkosasih8158 Жыл бұрын

Mas.... apa tahan sama Amper besar resistor nya...😅😅

@electrofixtips Жыл бұрын

Dear ahmadkos 🌹Suitable for low amps

@talhaijazprojectlimited5295 Жыл бұрын

If power supply is 14 volt how to get 12.6 v

@talhaijazprojectlimited5295 Жыл бұрын

@@electrofixtips wo sahi ha values kn si ho ghi resistance ki

@gabrielangbianshio4330 Жыл бұрын

What are the colour code

@philflip1963 10 ай бұрын

An uninteligable tangle of wires with illegible meter readout digits to anyone who doesn't yet understand what is going on I'm afraid. A simple sketch with explanation would be far better!

@electrofixtips 8 ай бұрын

Thanks for the feedback! I appreciate you taking the time to point that out🌹

@NitinPatel-mf7gw Жыл бұрын

Sir aap vdo me bda asani se dikha dete ho lekin fack Jab 12v milega n ise to sab k sab jal jayega

@kukurusakchannel1126 Жыл бұрын

Kalo bisa lebih detai mase

@electrofixtips Жыл бұрын

Dear kuku 🌹To create a voltage divider using four resistors in series, each with a resistance of 100 ohms, you can follow these steps: 1. Connect the resistors in series: Connect the four resistors end to end, so that the current flows through them one after another. 2. Identify the input and output: Determine which end of the resistor chain will be the input and which will be the output. The input will be the end where you apply the input voltage, and the output will be the end from which you measure the divided voltage. 3. Calculate the total resistance: To find the total resistance, add up the resistance values of all the resistors in series. In this case, since you have four resistors of 100 ohms each, the total resistance (R_total) will be 4 * 100 ohms = 400 ohms. 4. Apply the input voltage: Connect the input voltage source (V_in) to the input end of the resistor chain. 5. Calculate the output voltage: The output voltage (V_out) can be calculated using the voltage divider formula: V_out = (R2 / (R1 + R2)) * V_in In this case, since you have four resistors in series, you can consider the first three resistors as R1, and the last resistor as R2. So, R1 = 300 ohms and R2 = 100 ohms. The input voltage (V_in) will be the voltage you apply at the input end. V_out = (100 ohms / (300 ohms + 100 ohms)) * V_in = (100 ohms / 400 ohms) * V_in = (1/4) * V_in Therefore, the output voltage will be one-fourth (1/4) of the input voltage. 6. Measure the output voltage: Connect a voltmeter between the output end of the resistor chain and the common ground to measure the output voltage (V_out). Please note that in this voltage divider configuration, the output voltage will be one-fourth of the input voltage regardless of the magnitude of the input voltage, as long as the resistors remain the same.

@tohirincupaxkreatif4791 Жыл бұрын

using dioda you can so

@rolfeinecke Жыл бұрын

Und was bringt mir dieses Video? Ich weiß wie groß die Widerstände sind, das hier ein mehrfach Spannungsteiler entstanden ist, ich weiß auch welche Eingangsspannung angelegt wurde aber ich weiß nicht welche Sröme fließen und ich weiß auch nicht an welchem Abgriff ich welchen Strom entnehmen kann. Einfach nur was zusammenlöten bringts doch nicht, da helfen auch keine braunen Hände mit abgefressenen Fingernägeln!