I have several devices that require input from a dimmer bus/circuit (older avionics + gear like ADI and intercom). I also want to dim my indicator lights, which all bring the circuit low (i.e. to ground)
My transponder KLN-90 says it draws .5A on the lighting bus, so I have a dimmer load of about 750 mA.
My plan for the dimmer bus was to run 12v through a 3P switch. One pole will be straight through. The other two will get a 150 and 220 ohm resistor (12 watts). I have tested this with the indicator lights and it works well. I am wondering how this will work for the avionics. I am looking to avoid a rheostat, as they are expensive in the Wattage level that I need.
Does this plan work? Please help me find the holes in this plan. I have not yet hooked up the avionics, so haven't been able to test yet.
Thanks,
Larry
My transponder KLN-90 says it draws .5A on the lighting bus, so I have a dimmer load of about 750 mA.
My plan for the dimmer bus was to run 12v through a 3P switch. One pole will be straight through. The other two will get a 150 and 220 ohm resistor (12 watts). I have tested this with the indicator lights and it works well. I am wondering how this will work for the avionics. I am looking to avoid a rheostat, as they are expensive in the Wattage level that I need.
Does this plan work? Please help me find the holes in this plan. I have not yet hooked up the avionics, so haven't been able to test yet.
Thanks,
Larry