Drowsiness warning systems are now mandatory for new vehicles across the EU by law. With the necessary accessories, proFRAME can be used in their development and validation. The new LED driver adapter ledAD3 gives the user the means to control one or multiple LEDs, e.g., IR LEDs for illuminating the car’s interior in sync with the exposure of a camera sensor. The LED driver adapter is connected directly to the proFRAME Base Board 3.0 just like the camAD3 camera adapters. The LEDs that shall be synchronized are connected to the ledAD3 via the included connector. The power supply of the LEDs by the LED driver adapter is handled through an adjustable constant current source, with its output being toggled by the trigger signal from the camera sensor which is connected to a camera adapter on the same proFRAME Base Board 3.0 (Figure 1).

Figure 1: Synchronizing the LEDs with the camera sensor during video data acquisition

As an optional addition to the ledAD3 Base, the expansion module ledAD3 Expansion is available for controlling more LEDs that are toggled in sync with the trigger signal from a second camera. ledAD3 Expansion is attached directly to the ledAD3 Base and thus doesn’t occupy another slot on the proFRAME Base Board 3.0. Thus, a complete system consists of a proFRAME Base Board 3.0, a camAD3 camera adapter, an ledAD3 Base and, optionally, an ledAD Expansion. With such a system, LEDs can be operated in sync with one or two cameras (Figure 2).

Figure 2: Individual synchronization of the LEDs with two camera sensors