I setup a 5W potentiometer to cover dimming of my LED annunciators (12V LEDs that dim nicely) and my G3X (non-touch that doesn't have light sensors). I set it up as a voltage divider and it works well dimming everything. However, when I turn on the boost pump or pitot heat, the G3X dims quite a bit more (lower voltage=dimmer screen). I am thinking that the extra load from those LEDs (around 15 mA) is somehow dropping the voltage a bit and the G3X the dims further due to that. My curve goes from around 3 volts to around 10 volts in a linear fashion.
Should a Pot set up as a voltage divider work like this or is it possible I messed something up with the relays that are used on the boost pump and pitot heat circuits to activate the LEDs? The ground is shared by both the relay coil and the and the termination of the LED circuit - variable positive voltage is sent to the LED via the dimmer circuit.
I would like to avoid adding another dimmer just for the G3X, as I don't have the space for it near the other knobs.
Thanks for any insight or guidance in resolving this.
Larry
Should a Pot set up as a voltage divider work like this or is it possible I messed something up with the relays that are used on the boost pump and pitot heat circuits to activate the LEDs? The ground is shared by both the relay coil and the and the termination of the LED circuit - variable positive voltage is sent to the LED via the dimmer circuit.
I would like to avoid adding another dimmer just for the G3X, as I don't have the space for it near the other knobs.
Thanks for any insight or guidance in resolving this.
Larry