Hi I am wanting to wire 4 led, these are to light a model train so very small to match scale.
I have ordered them from Ebay as they are the right size and look like small spotlights to fit the model look. The listing says they are 3v 20mA white.
All I want to do is wire all 4 to a psu that I can plug in to mains 240v.
I have read a little and that in series would be best and with a resistor not sure on size.
Can someone point me in a direction that may help me. As not sure what resistor or psu would be best I assumed a 12v psu would be ok but I guess other factors for the psu may need to be considered.
Thanks
I have ordered them from Ebay as they are the right size and look like small spotlights to fit the model look. The listing says they are 3v 20mA white.
All I want to do is wire all 4 to a psu that I can plug in to mains 240v.
I have read a little and that in series would be best and with a resistor not sure on size.
Can someone point me in a direction that may help me. As not sure what resistor or psu would be best I assumed a 12v psu would be ok but I guess other factors for the psu may need to be considered.
Thanks