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18 August 2014 Question by: Rapid Customer
Q. The datasheet for these LEDs shows the larger part of the body as 1.6mm which makes sense. It then shows the area where the leads enter the body as 1.5mm Max - but that looks a lot smaller on the diagram than the 1.6mm immediately above. I'm wondering whether the 1.5mm is actually supposed to extend down to the point where the leads straighten out? That looks more likely for 1.5mm. Thanks.
A. Hi Nick. Thank you for your question. The 1.5mm you are referring to is the maximum tolerance the manufacturer will allow so whilst the picture does only look very small it is the maximum permissible allowance for the LED.
26 June 2013 Question by: Rapid Customer
Q. Your LED's 55-1654 warm light 1.8mm with max Voltage of 3.8(V) could I use this on 12 volts DC and if so what type and size resistor would I need to run this with?
A. Hi Barry. Thank you for your question. To use this LED on a 12V supply (one LED only) you need to subtract the supply voltage (12V) from the LED forward voltage (3.3V) = 8.7V and then divide by the forward current of the LED (30ma) in amps so 8.7 divided by 0.03 = 290 ohms. To ensure the maximum life of the LED you would need to use a 330 ohm resistor (next preferred value to 290 ohms) in this case.
26 April 2012 Question by: Rapid Customer
| Product code: 55-1654
Q. I am thinking of wiring up a model ship with some of these LEDs and running them off a 6V supply. What size resistor would I require? and would I get away, if wired with just using one?
A. Thanks for your enquiry Barry. You would need a 660 ohm resistor (product code 63-2399) and just one would be suitable for running of the 6V battery.