Linear Hall Magnetic Sensor KY-035 Pulse Oximeter It is a good solution

It is a good solution

controlling the Valves or solenoids

TTL output valid signal for low level

Strong Function: 1000X USB magnifier

TIP31 is a silicon  NPN power transistor show exceptional high gain performance coupled with very low saturation voltage

Linear Hall Magnetic Sensor KY-035 Pulse Oximeter It is a good solutionIntroduction : KY 035 is a hall magnetic sensor module that houses an AH49E linear hall effect device that is operated with the help of a magnetic source. The module varies the output voltage, which is generally set by the input supply voltage and varies in proportion to the strength of the magnetic field around the sensor. Pin Configuration of KY 035 Below is the pin configuration of the KY 035 magnetic sensor. This pin configuration can be used when