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By measuring the frequency
A knock sensor is a sensor which produces a voltage in response to some type of physical stress such as a knock or vibration
This enables the use of current limiting resistors tointerface inputs to voltages in excess of VCC
and household appliances like air conditioning
L293D Motor Driver. (1A) Current Sensor By measuring the frequencyIntroduction : The L293D is a 16 pin Motor Driver IC which can control a set of two DC motors independently in any direction. The L293D is designed to provide bidirectional drive currents of up to 600 mA (per channel) at voltages from 4. 5 V to 36 V. Can be used to drive bipolar stepper motor. Features : Max. motor current Per Channel : 1. 2A. Max. Continuous Motor Current Per Channel : 600mA. Supply Voltage Range : 4. 5 V to 36 V. Internal ESD
