Can I power 3V LED with 5V
You need to have that order of "leeway" voltage across the resistor in order to allow for variations in the LED voltage, so for an LED with a conduction voltage of 3 V, it is generally not practical to operate it from less than 5 V.
Can you power an LED with 5V
The three most common voltage options available for LED lighting are 5v, 12v and 24v. 5v power supply is ideal for achieving dynamic lighting in internal areas and can also be used in boats, gardens and caravans.
Will 5V fry an LED
If you drop 5V across an led designed for 3.3V @ 20mA, it will pull much more than 20mA and burn out pretty much immediately. Diodes have a very sharp IV curve so even a fraction of a volt above their nominal will cause it to burn out quickly. Even 0.1 volt will do that.
Can you run 5V LEDs on 12V
A 5V LED must not be run on 12V. But there are lots of options to convert 12V to 5V. As Jason Vaughan notes, a USB charger intended for a car will do a good job – unless you need a lot of power.
Will 5V work with 3.3 V
A 3.3 V device can interface with a 5V device without any additional components. For example, a logic 1 (HIGH) from a 3.3 V device will be at least 2.4 V. This will still be interpreted as a logic 1 (HIGH) to a 5V system because it is above the VIH of 2 V.
How to amplify 3V to 5V
The main ways to interface a 3.3V output to a 5V input are:Direct connection.Using a 74HCTxx gate (or other 5-V TTL-input compatible families)Using a diode offset.Resistor Offset.BJT/MOSFET inverter.Series MOSFET.Series BJT.Level Translator IC.
Can I use 5V instead of 3V
Very rarely you will find that this works, but only if the difference is small, and usually only on simple appliances or products. Your fan is a simple device, and the parts used may be able to tolerate the higher voltage… but be warned from what I said above.
How to convert 5V to 3V using resistor
So back to our circuit, if we have 5 volts and want 3V from it, we use the formula above. If we use a 10KΩ as our R1 resistor, plugging in the values, we get R2= (V)(R1)/(VIN – V)= (3V)(10KΩ)/(5V – 3V)= 15KΩ. So we can use a 15KΩ resistor as our R2 resistor with the R1 resistor being 10KΩ.
Is 5 volts too much for 4.5 volt LED
For a LED rated 4.5v, 5v is assumed safe. Anything from about 4.5 to 5.5 Volts is safe for these LEDs and 6V is the 'rated absolute maximum'. Any higher and they'll burn out quickly. LEDs often require a certain amount of volts, depending on the type and color of the LED.
Will low-voltage damage LED lights
No, low voltage will not damage an LED light as they are a diode, meaning, if you don't supply enough voltage, proper light won't be emitted. This is partially way dimming switches work so well with LED lighting. In fact, running an LED light through a lower voltage could in fact increase its lifetime.
Is 5V stronger than 12V
So the 5V system is 2.4 times more efficient than the 12V system, meaning you need to provide 2.4 times as much power as a 5V system to achieve the same outcome. Where is all this extra power used up in the 12V system you may ask Well, it is dissipated in the form of heat!
Can I use 5V charger for 3V battery
Probably not directly. A 5V charger has a specified voltage. If 5V are applied to a discharged Lithium-Polymer battery (around 3V), the current going into the battery might be several times over the maxium tolerable charging current for a 380mAh battery, which would be 380mA (better is 100mA).
Can I use a 5V for 3V motor
If the motor really takes 50mA at 3V (motor specifications are very unreliable/difficult to read) then it will take a lot more if you feed it 5V. So yes damage is pretty much inevitable. 50mA will be the no-load current I suspect, which isn't useful for any design calculations. can measure this with a meter).
How to convert 5V to 3V
AC DC & DC DC converter , wireless…Tip 1, Use LDO regulator to supply power from 5V power supply to 3.3V system.Tip 2, Low Cost Power Supply System Using Zener Diodes.Tip 3, Lower cost power supply system using 3 rectifier diodes.Tip 4, Using a Switching Regulator to Power a 3.3V System from a 5V Supply.
What resistor needed for 3V LED
Basics: Picking Resistors for LEDs
| Power Supply Voltage | LED Color | Resistor (rounded) |
|---|---|---|
| 3 V | Red, Yellow, or Yellow-Green | 51 Ω |
| 4.5 V | Red, Yellow, or Yellow-Green | 39 Ω |
| 4.5 V | Blue, Green, White, or UV | 51 Ω |
| 5 V | Blue, Green, White, or UV | 68 Ω |
Can I use 4.5 V instead of 3V
4.5V is 50% over 3V. Circuits are not usually designed for that much over-voltage. If it is intended to run off two AA batteries, there is no need to anticipate any voltage higher than 3V. Even if it seems to be working at the higher voltage, components could be stressed or overheating.
How many LEDs can 5V power
This is called kirchhoff's voltage Law. So if you have a 5v power supply and each of your LEDs have a forward voltage drop of 2.4V then you can't power more than two at a time.
What voltage is safe for LED
2-3 volts
Voltage surges can have a destructive effect on electronic equipment, including LED light bulbs. LEDs often require a certain amount of volts, depending on the type and color of the LED. Most experts recommend 2-3 volts for LEDs. However, you can look it up to be certain.
Can LED lights work with any amount of voltage
LEDs require drivers for two purposes: LEDs are designed to run on low voltage (12-24V), direct-current electricity. However, most places supply higher voltage (120-277V), alternating current electricity. An LED driver rectifies higher voltage, alternating current to low-voltage, direct current.
Can I use A 5V for 3V motor
If the motor really takes 50mA at 3V (motor specifications are very unreliable/difficult to read) then it will take a lot more if you feed it 5V. So yes damage is pretty much inevitable. 50mA will be the no-load current I suspect, which isn't useful for any design calculations. can measure this with a meter).
Can I use 5V charger for 3V
Can I use A 5V adapter to power A 3V device It could result in immediate failure that could result in smoke or even fire.
What resistor do I need to drop 5V to 3V
So back to our circuit, if we have 5 volts and want 3V from it, we use the formula above. If we use a 10KΩ as our R1 resistor, plugging in the values, we get R2= (V)(R1)/(VIN – V)= (3V)(10KΩ)/(5V – 3V)= 15KΩ. So we can use a 15KΩ resistor as our R2 resistor with the R1 resistor being 10KΩ.
What resistor for 3V LED 5V
Description
| Supply Voltage | LED voltage | Resistance |
|---|---|---|
| 5V | 2V | 150 Ohm |
| 3V | 100 Ohm | |
| 6V | 2V | 220 Ohm |
| 3V | 150 Ohm |
How many LEDs can 3V run
One 3V Coin Cell Battery can run up to 6 Sewable PCB LEDs or up to 6 leaded LEDs (listed in the link above). We have successfully ran up to five colour changing or flashing LEDs from a single (new) 3V Coin Cell Battery.
What resistor to use with LED 3V
3V/0.015 gives 200 ohms. Use a resistor near this value – a smaller resistor gives more current, and those two LEDS will be a bit brighter.
