Wednesday, September 23, 2015

Circuit Schematic DC Motor Speed Sensor using OS25B10 and LM393 IC

Eltronicschool. - There are many circuit schematic designed to control speed dc motor like in Figure 1 below. In here we will give you specific Circuit Schematic DC Motor Speed Sensor using OS25B10 and LM393 IC. (You also can read: Circuit Schematic 12V LDO Solar Charge Controller using MOSFET)

Circuit schematic

Figure 1. Circuit Schematic DC Motor Speed Sensor using OS25B10 and LM393 IC

Component Parts
  1. R1 = 180
  2. R2,R3,R4,R6 = 10K
  3. R5,R7 = 1K
  4. D1, D2 = LED
  5. C1,C2 = 100nF
  6. OC1 = OS25B10
  7. IC1 = LM393
Description

Circuit schematic like in Figure 1 above is Circuit Schematic DC Motor Speed Sensor using OS25B10 and LM393 IC. According Electroschematics site describe that as stated, the circuity can be used to send calibrated pulses to a microcontroller-based tacho meter or similar circuit/device. The wiring of the hardware turned out to be deceptively simple. At the heart of the circuit is the OS25B10 transmissive optical sensor with phototransistor output (OC1).

Next is the venerable LM393 dual comparator chip (IC1) configured as a simple Schmitt trigger (schmitt triggers are fundamental circuits with several uses; one is signal processing, they can pull digital data out of some extremely noisy environments). The green indicator (LED1) indicates the presence of voltage applied, and the red indicator (LED2) monitors output of the motor speed sensor module. Recommended working voltage of the module is 4.5 to 5.5 volt dc.

Note that a 180R resistor (R1) is used here to limit operating current of the light emitting diode inside OS25B10 optical sensor (OC1). It might become necessary to alter this value in your prototype. Similarly, try to tweak the value of the 10K resistor (R2) to get a decent voltage swing based on your real life application. The last 10K resistor (R7) is an optional pull-up resistor.


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