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当前版本: oldturkey03 ,

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Keep your 9V AC adapter. Connect your LED strips in series. Use a resistor from your adapter to the LED strips. To figure out the size of the resistor use R = (V1 - V2) / I R=(9-4.5)/I
You

You
do need to know what LED's you have and how many. Typical values for LEDs are are:
Keep your 9V AC adapter. Connect your LED strips in series. Use a resistor from your adapter to the LED strips. To figure out the size of the resistor use R = (V1 - V2) / I R=(9-4.5)/I
You

You
do need to know what LED's you have and how many. Typical values for LEDs are are:
Red LED: 2V 15mA
Green LED: 2.1V 20mA
Blue LED: 3.2V 25mA
While LED: 3.2V 25mA
After thatTo figure out the size of the resistor use R = (V1 - V2) / I
R=(9-4.5)/I
(9-4.5)/0.02
4.5/0.02=225 ohms (easiest available resistor would b a 230ohm resistor)
Or you can
use [http://ledcalculator.net/|this calculator ]tocalculator]to figure out how to wire it by using resistors.
After thatTo figure out the size of the resistor use R = (V1 - V2) / I
R=(9-4.5)/I
(9-4.5)/0.02
4.5/0.02=225 ohms (easiest available resistor would b a 230ohm resistor)
Or you can
use [http://ledcalculator.net/|this calculator ]tocalculator]to figure out how to wire it by using resistors.

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编辑: oldturkey03 ,

文本:

Keep your 9V AC adapter. Connect your LED strips in series. Use a resistor from your adapter to the LED strips. To figure out the size of the resistor use R = (V1 - V2) / I R=(9-4.5)/I

Typically 20mA (.02A)for LED. So if your Light has 5 LED's that would give you 100mA (0.1A)

R=(9-4.5)/0.2A (two light trips with total of 10 lights)

R=22.5 ohms

Only issue here would be that it would help
You do need to know what Voltages your LED's you have and how many. Typical values for LEDs are rated for. Typically, the forward voltage of an LED is between 1.8V and 3.3V

I'd go with a 3.3V LED and would
:
Red LED: 2V 15mA
Green LED: 2.1V 20mA
Blue LED: 3.2V 25mA
While LED: 3.2V 25mA
After that
use a 30ohm resistor[http://ledcalculator.net/|this calculator ]to figure out how to wire it by using resistors.

Typically 20mA (.02A)for LED. So if your Light has 5 LED's that would give you 100mA (0.1A)

R=(9-4.5)/0.2A (two light trips with total of 10 lights)

R=22.5 ohms

Only issue here would be that it would help
You do need to know what Voltages your LED's you have and how many. Typical values for LEDs are rated for. Typically, the forward voltage of an LED is between 1.8V and 3.3V

I'd go with a 3.3V LED and would
:
Red LED: 2V 15mA
Green LED: 2.1V 20mA
Blue LED: 3.2V 25mA
While LED: 3.2V 25mA
After that
use a 30ohm resistor[http://ledcalculator.net/|this calculator ]to figure out how to wire it by using resistors.

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原帖由: oldturkey03 ,

文本:

Keep your 9V AC adapter. Connect your LED strips in series. Use a resistor from your adapter to the LED strips. To figure out the size of the resistor use  R = (V1 - V2) / I R=(9-4.5)/I

Typically 20mA (.02A)for LED. So if your Light has 5 LED's that would give you 100mA (0.1A)

R=(9-4.5)/0.2A (two light trips with total of 10 lights)

R=22.5 ohms

Only issue here would be that it would help to know what Voltages your LED's are rated for. Typically, the forward voltage of an LED is between 1.8V and 3.3V

I'd go with a 3.3V LED and would use a 30ohm resistor

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