I want to be able to reproduce the voltage and current capability of a VTX in my apartment to test some stuff. 12 volts is easy to get, but does anyone have any idea of how to get enough current? Probably about 10 amps or so, maybe less..
Adjustable power supply, they have a grid for voltage and amps, Radio control racers use them to supply power for their chargers when they charge the batteries. Check your local hobby store, They are pricey however.
I am sure there are other ways to do it, someone will pipe in.
use a small battery charger connected to a motorcycle or lawn tractor battery. Put the battery in a plastic container, a battery box made for a boat works great. A 6 pack size ice chest also works well. Used to use this setup when working on CB radios and 8-track tape decks. (its a really old idea, like me ) Be sure to use a fuse between the battery and your project.
I had a variable AC-DC plug, but not enough current. I dont want to buy anything. My laptop unfortunately is 20 volts but that might be okay since it is just a small motor for air horns. I dont know Im still looking for idears though..