Multi-LED circuit design - LED Parallel Circuits
video description
People use different resistance values connect in parallel with leds to indicate battery voltage.
As per your lecture if take same colour led of 3mm connected in parallel with 3 leds would like to glow when full if battery is 100% if battery reach to 50% then two leds if battery reaches to 20% then cut off.
Let's assume battery 18650 full is 4. 2v
Then let's set another volt for 50% that means when battery reaches to 3. 6v and when reaches to 20% means 3. 2 and when battery drain to 3v complete off.
So here would like to understand calculation of resistance use in circuit.
Please help. I am leaning and interested to apply such circuits
Date: 2023-11-17
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Comments and reviews: 17
Iron
I believe at 4: 23 the resistor power is 0. 41976W, say 0. 42W. Not 0. 49W as stated. Not that it matters as the same half Watt resistor would be used. Thanks for your video as I am new to LED's and I am making my own head tracking setup for DCS. A couple of bucks in parts, an old webcam and free software is going to save me a lot of money. Your video has helped a lot.
Regards,
IKM
reply
I believe at 4: 23 the resistor power is 0. 41976W, say 0. 42W. Not 0. 49W as stated. Not that it matters as the same half Watt resistor would be used. Thanks for your video as I am new to LED's and I am making my own head tracking setup for DCS. A couple of bucks in parts, an old webcam and free software is going to save me a lot of money. Your video has helped a lot.
Regards,
IKM
reply
CornishCo
It should be noted that color LEDs which are in clear plastic when off require different supply voltage. However, LEDs that use colored plastic to filter the light are typically the same voltage. You should always check the manufacturers cut sheet for the correct voltage and drive current.
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It should be noted that color LEDs which are in clear plastic when off require different supply voltage. However, LEDs that use colored plastic to filter the light are typically the same voltage. You should always check the manufacturers cut sheet for the correct voltage and drive current.
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Joh750
You state resistor power. I am wondering if that resistor power is the same power from power supply for my LEDS. I would like to setup 20 white LEDS in parallel. Your example has a 0. 49W. Therefore I resume I would a power supply that can provide at least 0. 50w
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You state resistor power. I am wondering if that resistor power is the same power from power supply for my LEDS. I would like to setup 20 white LEDS in parallel. Your example has a 0. 49W. Therefore I resume I would a power supply that can provide at least 0. 50w
reply
Ron
I have a parallel LED circuit with two LEDs, a green and a red. They both have a resistor (that I believe is the correct value for the individual LEDs) and the red LED has a switch on it. When I turn the switch on the green LED dims when the red LED lights up.
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I have a parallel LED circuit with two LEDs, a green and a red. They both have a resistor (that I believe is the correct value for the individual LEDs) and the red LED has a switch on it. When I turn the switch on the green LED dims when the red LED lights up.
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FruitBasket
I think it's worth pointing out that you want to put as many LEDs in series as possible before going in parallel. That way, you can use smaller resistors and have less energy wasted in resistors (thus longer battery life.
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I think it's worth pointing out that you want to put as many LEDs in series as possible before going in parallel. That way, you can use smaller resistors and have less energy wasted in resistors (thus longer battery life.
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Горан
I hope one of your next videos will be on designing switch mode control for LED, or maybe LED matrix, and analysing how its used to significantly increase efficiency and reduce power loss. Keep up good work. Best regards.
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I hope one of your next videos will be on designing switch mode control for LED, or maybe LED matrix, and analysing how its used to significantly increase efficiency and reduce power loss. Keep up good work. Best regards.
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Jim
2: 02 Why wouldn't the current per branch increase in your calculation for the resistor when you did take that into account in your later explanation with three LEDs in parallel but with one resistor before they branch out?
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2: 02 Why wouldn't the current per branch increase in your calculation for the resistor when you did take that into account in your later explanation with three LEDs in parallel but with one resistor before they branch out?
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TheAnimeist
1: 25 Should be: Battery Life = 500 mAh / 120mA
Later on you have the equation correct. Not being picky, just trying to help improve on an already top notch and practical explanation of LEDs.
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1: 25 Should be: Battery Life = 500 mAh / 120mA
Later on you have the equation correct. Not being picky, just trying to help improve on an already top notch and practical explanation of LEDs.
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Yojanna
If all kinds of LED color need 20mA, that means if we want to use different color of led with the same supply, constant current method is better than constant voltage method, Right?
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If all kinds of LED color need 20mA, that means if we want to use different color of led with the same supply, constant current method is better than constant voltage method, Right?
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Nabeel
Can we run 100 led connected parallel or serious vy one led driver. The drive will take ac input 230v. Pr we need to put resistor for ech led. Plz answer
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Can we run 100 led connected parallel or serious vy one led driver. The drive will take ac input 230v. Pr we need to put resistor for ech led. Plz answer
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ItalosVEVO.
if i use a current regulator, can i connect different color led in parallel? and for the voltage? if i get for example 3. 5V for all color?
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if i use a current regulator, can i connect different color led in parallel? and for the voltage? if i get for example 3. 5V for all color?
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hereandthereify
Help! I'm looking for a clear explanation on how to wire multiple bulbs to one switch in Europe. Can't find anything! Do you have one?
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Help! I'm looking for a clear explanation on how to wire multiple bulbs to one switch in Europe. Can't find anything! Do you have one?
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warren
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Rony
Hello My question is, If a Drone is flying at height so does its rotor or motor gets affected by lightning in rainy season.
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Hello My question is, If a Drone is flying at height so does its rotor or motor gets affected by lightning in rainy season.
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Travi5
You shouldn't connect LED's in parallel like at 3: 20 as a failure could cascade and cause them all to burn out
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You shouldn't connect LED's in parallel like at 3: 20 as a failure could cascade and cause them all to burn out
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Jonathan
Excellent. Step by step and exceptionally clear, aided by simple and clear graphics. Bookmarked. Thanks.
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Excellent. Step by step and exceptionally clear, aided by simple and clear graphics. Bookmarked. Thanks.
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Freedom
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Hey is there any other platform I can buy your shirts/ hoodies from? Spring shipping is kind of lengthy
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