(PDF) CONTROL SYSTEMS NOTES | KAVIN RAJAGOPAL Fig. 21 Block diagram of an electronic control system Fig. 22 Block diagram of a mechanical system The structure of the electric toothbrush can be designed according to its operation block diagram. Fig. 23 shows the cross section of a typical electric toothbrush, the operation of which should correspond with the block diagrams shown above. Active learning across intermetallics to guide discovery of Sep 12, 2018The electrochemical reduction of CO 2 and H 2 evolution from water can be used to store renewable energy that is produced intermittently.