I am designing the circuits for my new Field Box. I see that most comercial power panels have "variable current" for the glow plug. Has anybody measured the current range that these have? I would assume that these panels don't actually have variable current, but instead have variable voltage (cheaper to make). That being the case, I would make a simple supply that ranged from 1.2 to 2 volts. I have not checked the Ohms value of a standard #8 plug but for ease of calculating lets assume 1 Ohm. If I supply 1.2 Volts to a 1 Ohm load I get 1.2 Amps. If I supply 2 Volts, I get 2 Amps. I checked my Nicad battery in my portable ignitor and it is a 1400ma battery. So my previous calculations seem reasonable. Has anybody made their own supply? If so what range did you use? What are the recommended specifications for the glow plug?

Before I get flamed, I know you can buy a whole power panel for $20.00 but I hate to buy things that I can make.


Mike B.