12w at 12v = 1amp
3/12=0.25
0.25amp = 250ma
2.5ah= 2.5amps per hour
2.5/0.25=10
A 3w led at 12v 2.5ah battery will last 10 hours.
yes
The resistance value for an LED bulb in a 12V DC circuit can vary depending on the specific LED bulb used. Generally, LEDs have very low resistance values due to their semiconductor nature. It is more common to use a current-limiting resistor in series with the LED to control the current and prevent damage to the LED.
To run a 12V LED from a 24V supply, you can use a resistor or a DC-DC buck converter. If using a resistor, calculate the appropriate resistance value to limit the current to the LED's specifications, ensuring it can handle the excess voltage drop. A buck converter is more efficient, converting the higher voltage down to 12V without significant power loss. Always ensure that the current drawn does not exceed the LED's rated specifications for safe operation.
A back pin tower G4 12V DC 6W High Power LED Bulb 360 Degree is equivalent to a G 4 20W halogen bulb.See related links below.
A simple circuit that uses only one device would be a battery connected to an LED light. The battery provides power to the LED, causing it to light up. This type of circuit is commonly used in handheld flashlights.
I kinda wonder that myself...I am running my 12v LED computer fan from a 12v battery pack from my Ryobi drill with the charging cable inserted into the battery...it says its charging, and my fan is running...So, I will see if it doesnt explode...fingers crossed...
You can purchase a 12v LED online from the Amazon website. Once on the page, type "12v LED" into the search field at the top of the page and press enter to bring up the items.
According to research, the Energizer brand LED light provides a long battery life. It is also better to use an LED as it does not use as much battery life.
A 12v LED TV is a 12 volt usage Television set that is designed to conserve energy and be efficient at the same time. The 12v LED TV is suppose to give high quality resolution along with reducing your energy cost.
yes
This will depend on the size of the 12 v battery.
Target is by far the best place online to purchase your 12v led TV adapter. They offer exceptional quality at a reasonable price. The most preferred brand is Sony.
Connect one wire from the LED to each of the terminals on a battery - provided the battery has enough power, the LED will glow !
The iPhone 3GS can have around 5-6 hours of constant use (screen lit up). There is an app i recommend which tell you an approximation on your battery life, how long you can do certain tasks and such. Its called "Battery LED."
50 resistors
They might burn but they would be very dim and the battery would last for a very short time. They are 12 volt lights therefore it will take 12 volts for them to burn at the level of brightness that they should.
first you need a led light (like on Christmas lites), a 3 volt battery, tape and a magnet first slide the battery in between the wires on the led light the long wire should be on the positive side of the battery. then put tape around the light and battery. Finally put the magnet on the positive side of the battery.