How do I calculate an LED power supply?
I bought some 12v LED strips and used them to surround a display in my shop. I soldered all the strips together and attached my bench supply. The LED's seem pretty forgiving and I can run them at a reasonable brightness at anything between 8.3 and 12 volts.
8.3 volts draws 0.065 amps and 12 volts draws 0.65 volts.
I have no idea why it seems to draw less current at a lower voltage, unless my ammeter is faulty on my PSU.
I am now wanting to attach a power adapter. I have a 12v 500mA supply but am worried it won't cope.
I also have a 12v 1.25 amp supply but am guessing this may up the voltage and burn out the LED's.
Do I really need to buy a 12v LED driver or can I get away with a cheap non-switching adapter? And if so do I need to go for something like a 12V 650mA?