Just curious, if my memory serves me right, when LED lights up, the voltage across it drops to 0.7V (or thereabout ?). So Oceandeep, what jc85 meant when he mentioned how big a resistor needed to take on the balance voltage of 8.4V, assuming you use a 12V adaptor and 5 LEDs ? You using the adaptor's internal resistor (variable ?) to absorbed the balanced voltage ? How is the heat amount generated by the adaptor ?
I am thinking of doing a moonlight consisting of 2 sets of 5 LEDs each. Both sets powered from 1 variable-voltage adaptor.
Any DYI guru can advise the best series/parallel connection from voltage/current standpoint ?
Thanks.