a 5v incan bulb could be used as a resistor instead of a 25watt resistor
I built a 5V 6A power supply (30W max) for a LED sign
QuoteI built a 5V 6A power supply (30W max) for a LED signThe typical LED is drived by constant current power supply, but you try do constant voltage one. Could you show us detail of your LED sign?
Ok, let me give you stupid answer;- ^_^What you asked is dummy load for test PSU. The Lefty solution is worked, since you target current is 6A, the resistor should be 0.83 ohm, you do not need measure current, all you need to do is measuring voltage cross the resistor. 0.83 ohm/25 w resistor might not be easy to obtain. People some time use active dummy load.Please seach net, you will find some design you prefer.