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. Author manuscript; available in PMC: 2019 Jun 3.
Published in final edited form as: IIE Trans Healthc Syst Eng. 2015 Mar 16;5(1):1–13. doi: 10.1080/19488300.2014.993005

Fig. 1.

Fig. 1

On the top, a prototype of the bed angle monitor with: a) bubble level indicator, b) USB port, and c) LED indicators. On the bottom, the inside of the device revealing: d) two circuit boards, e) a rechargeable battery, and f) the magnet on the back cover.