The ability to measure microgram and milligram masses with extremely high accuracy is often critical in pharmaceutical and chemical industries. This design combines a pickup head from a compact-disc (CD) system and a millimeter-sized cantilever mounted on the CD’s optical pickup head (OPH) to build an alternative, cost-effective microbalance. This simple setup interfaces to a personal computer through a PSoC microcontroller for read out (Fig. 1).
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