Ok, quick refresher for those just joining the thread....
The units are custom designed and utilise a microcontroller to manage multiple modes of operation, automatically selected based on operating conditions....
There are 3 inputs into the controller boards that take a feed from the driving light (h7), main beam (h7) and indicator. Each of these feeds acts like a switch, so when that particular bulb receives power, the microcontroller detects this and changes the current mode to the relevant mode required.
The modes are:
Start-up mode: 0-100-80% transition per ring in sequence from inside to out of car
day mode: 80% Power
night mode: 60% Power
Signal mode: 60% for inner and outer rings with centre ring off
main beam: 100% power
One important point is that the "Signal mode" , i.e indicators flashing is a high priority program interrupt, so no matter what else the unit was doing, start-up, high, low whatever, they switch instantly to Signal mode. This is a safety feature so that if the indicators are in use the DRL's do not interfere with them, ever.
As you can see from the above picture, the controllers have 3 inputs + power on the left and 3 outputs on the right.
Each output is a regulated LED supply using a high grade LED driver that ensures the exact power is sent to the LED rings to keep them stable and happy. The actual visible luminosity of each ring is an optical illusion based on the technique of turning the ring on and off at very high speed (Pulse Width Modulation) which makes the LED look like it is dimming etc, when it actually isn't
The overall power supply for the two controllers and 6 rings is a "buck/boost" type supply with regulation, stabilisation & isolation capabilities to protect the electronic components from over, under & reverse voltage situations. This will ensure the longevity of the electrical components and specifically stop the rings flickering or dimming accidentally while the engine starts like your headlights do
The power supply is actually so efficient that it will run the circuits and the rings on only 6 volts of input power! so if your battery is so flat it wont start the car, the rings will still operate perfectly,
The Blue unit above is the power supply in use for this project. We are still planning to have them start on the unlock of the car from the remote, but that's still a work in progress.