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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: IEEE Sens J. 2015 Jul 15;15(9):4905–4916. doi: 10.1109/JSEN.2015.2430859

Fig. 2.

Fig. 2

Block diagram of the EnerCage-HC system for automated, high throughput, and long-term awake animal experiments in a standard homecage. The controller unit has an FPGA to process the position data from the PC and activate the WWCs in a way that they form 3- and 4-coil power transfer links based on the animal position. The PA output power is dynamically controlled in a closed loop based on the received power at the mobile unit. All the acquired information and system operating status are wirelessly transmitted to the PC station. The mobile unit on the animal body receives power inductively, generates a stable supply voltage through a power management ASIC, and communicates with the RFID reader via load shift keying (LSK). An LED blinking at 50 Hz with 4% duty cycle helps with 2D/3D Kinect localization and indicates both the animal location and orientation (i.e., where it is heading) inside the homecage.