Tacometro digital para comprobar motores N20
thingiverse
Platform that supports the PCB with Arduino and 7-seg display, IR sensor, and motor to be tested, measurement is made with a black background disc and 4 white marks. In the sketch goes the connection between the display and Arduino Nano, we can put an alarm that sounds if it exceeds x rpm's. Power supply is at 6v for both Arduino and motor, either with a source or DC-DC converter and a 3.7v LiPo battery
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