This is not exactly to do with a Picoscope but I hope to use the scope once I understand how the system works. Many new cars are using a single filament bulb on the rear, it does the rear light and brake light. I remember being told that these bulbs are controlled by Duty Cycle (or OCR) I understand the basic principle of duty cycle but would like to know how this makes the bulbs dimmer (when the lights are on, but no brake) and brighter when the brake lights are on.
Does the voltage remain the same (12v) or does that change. Any help would be great.