Hi All,
I'm looking for a simple circuit to dim a LED dash. It's for a project I'm helping a friend with. He is building a factory 5 cobra.
The new style dash they offer is a full LED backlight and clearly won't dim on a standard rheostat. The limitation I'm working to is that he wants to keep the dash looking original, so he will use the Lucas-style bakelite knobs.
The options are as I see it:
1, Use a potentiometer (modify it to take the Lucas knob); this clearly is not the most efficient circuit. But given its light use, it should be OK.
2, Use a 555 timer to build a PWM circuit.
The question I have is, can I control a 555 timer with a rheostat rather than a potentiometer? Using the original Lucas rheostat will mean I don't have to modify the dash and the overly brittle bakelite knob.
I'm looking for a simple circuit to dim a LED dash. It's for a project I'm helping a friend with. He is building a factory 5 cobra.
The new style dash they offer is a full LED backlight and clearly won't dim on a standard rheostat. The limitation I'm working to is that he wants to keep the dash looking original, so he will use the Lucas-style bakelite knobs.
The options are as I see it:
1, Use a potentiometer (modify it to take the Lucas knob); this clearly is not the most efficient circuit. But given its light use, it should be OK.
2, Use a 555 timer to build a PWM circuit.
The question I have is, can I control a 555 timer with a rheostat rather than a potentiometer? Using the original Lucas rheostat will mean I don't have to modify the dash and the overly brittle bakelite knob.