Asked by: Martin Gilfillan
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Q:
Will two AA batteries be sufficient to light this?
A:
Hi Martin,
Thank you for your question that should work as the LED runs from 2.8V to 4.5V and 2 x AA would supply about 3V so should be fine.
Best Regards
Cullen
Thank you for your question that should work as the LED runs from 2.8V to 4.5V and 2 x AA would supply about 3V so should be fine.
Best Regards
Cullen
Answered by: Cullen Lewis
08-Jul-19
Q:
I need to have 6 of these running off a 12volt power supply .What resistor will i need if I wire them in parallel
Asked by: Tony Fellows
A:
Hi Tony, The issue with connecting these to a supply voltage higher than 5V and then trying to limit this using a resistor is that the LED works by turning on different amounts of red, green & blue LEDs therefore to get red just the red LED is on to get purple the red and blue LED are on. This means that the current consumption of the LED when purple will be twice the current of the red as twice as many colours are on. The way you would normally work out the current limit resistor is to look at how much current the LED takes and the voltage that would drop across the resistor, the issue is that whilst there would be 4V over the resistor the current is variable. This means that you can’t work out what the value of the resistor using theory. The better option is to use a 5V regulator to drop the 12V’s down to the 5V supply that these LED’s can handle.
Answered by: Michael Lockhart
31-Mar-17
Q:
If i wire these in parallel to your usb power cable (https://www.kitronik.co.uk/4101-usb-power-lead.html) would i need a resistor and if so which is best?
Asked by: Sam
A:
Hi Sam, The colour changing LED’s are rated to 5V’s so you wouldn’t require a resistor for these. In terms of putting them in parallel you would need to make sure that you have enough current to supply the LED’s. Each LED takes between 20-25mA, and some of the colours can take up to 50mA’s.
Answered by: Michael Lockhart
22-Sep-16
Q:
I would like to wire 40 of these in parallel for use as Christmas tree lights but I am not sure about the viewing angle.
Asked by: Andrew Noble
A:
The viewing angle is 30 degrees. Just be aware that if you are using 40 of them then you will need at least a 1A power supply.
Answered by: Aaron Sturman
21-Apr-14
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