Hi,
I have made a simple circuit with a 3V battery, and 3 blue LEDs. A guy at work worked out the resistors I needed to get the LEDs in parallel. This all works fine, but He is a little hard to understand, so I was wondering if someone could explain simply how he got these results. Here is the data
3x Blue 10mm LED:
Voltage drop of each LED = 3.5
30mA
each resistor is 84Ω
2x AA 1.5V batteries.
I tried using the formula R = (Volts supplied - Volts drop) / current. This obviously won't work as I get a negative number.
Please don't get too technical. I have a hard enough time as it is. Is there another formula to use?
Thanks
Vincent
I have made a simple circuit with a 3V battery, and 3 blue LEDs. A guy at work worked out the resistors I needed to get the LEDs in parallel. This all works fine, but He is a little hard to understand, so I was wondering if someone could explain simply how he got these results. Here is the data
3x Blue 10mm LED:
Voltage drop of each LED = 3.5
30mA
each resistor is 84Ω
2x AA 1.5V batteries.
I tried using the formula R = (Volts supplied - Volts drop) / current. This obviously won't work as I get a negative number.
Please don't get too technical. I have a hard enough time as it is. Is there another formula to use?
Thanks
Vincent