Indicators brightness control
When I built my breaker/switch panel, I added LEDs to indicate active circuits for better visibility.
After two night passages, I discovered a problem: while the indicator LEDs work well during the day, they are far too bright at night. To fix this, I designed a small electronic board.
The board dims the indicators by about a 1:2000 ratio by controlling the common negative side of the LEDs using PWM. I used a small microcontroller so I can easily adjust the dimming ratio without having to change any hardware components on the board.
Board has 4 wires connected.
- 1- common wire (negative side, cathode) for LEDS
- 2- 12V power (about 0.01mA power consumption)
- 3- Nav lights power (signal to switch LEDs to low brightness mode)
- 4- Negative 12V (ground)
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