Should I be looking at building my own AC to DC power supply? I have read a little bit about creating one but haven't seen yet how to regulate the output amps. Or should I purchase something like this: http://www.amazon.com/12-Volt-Power-Supply-Standard/dp/B00B8TRF0Aand step down the voltage to 6 volts? Is stepping down voltage with resistors reliable?
Is stepping down voltage with resistors reliable?
Yes it is very reliable, but totally useless when you have to draw a significant amount of current from the potential divider. As a rough rule of thumb you need 10 times more current down the potential divider chain than you draw out. So if you draw 5 Amps out you need to supply the potential divider with 50 Amps, even then regulation will be poor.This means that the resistors will get very hot, 50 Amps at 12 Volts is 600 Watts, most of which is heat in the resistors. So yes if you want a combined electric heater it might be the way to go.
A 6V output SMPS (or even 5V) might be the thing you are looking for? But you will have to measureyour peak current requirement before proceeding.
I would not go over the max Voltage! Although not extremely common 6v power supplies can be found. Look at this one http://www.alibaba.com/product-gs/970152463/6V_20A_High_frequency_lab_power.html?s=pThe other option would be to use a 6v BEC. The biggest problem you have is the amperage. 6v is easy to supply at 1-5 amps. 6v at 12amps is not so easy supply. Most BEC's stop before 5amps.
questionwill the system work at 5volts ?