Phototransistor Circuit for Motor Control

  • Thread starter Microhoo
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    Infrared
In summary, the person has been working on a circuit involving infrared phototransistors and a motor. However, the circuit is not functioning properly and it is suggested to refer to a similar thread for potential solutions and to ensure proper components are included. A schematic and protective diode are also recommended.
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Microhoo
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  • #2
Your post makes no sense without showing us a schematic.
 
  • #3
It sounds like you are trying to drive a motor directly with a phototransistor.

This is unlikely to work because the motor needs a lot of current to work and the phototransistor is unable to supply this.

There was a similar thread last year and you might like to have a read through it and a look at the drawings in it. There were several circuits that would possibly help you.

Click on this:
https://www.physicsforums.com/showthread.php?t=333127

Your motor would be switched by the relay contacts at the right of the various circuits.
Be careful to include the protective diode where shown in the circuits.
 

What is an infrared phototransistor?

An infrared phototransistor is an electronic device that converts infrared light into an electrical signal. It is similar to a regular phototransistor, but it is specifically designed to detect infrared light.

How does an infrared phototransistor work?

An infrared phototransistor works by using a material that is sensitive to infrared radiation, such as silicon or germanium. When infrared light hits the material, it causes electrons to be released, creating an electrical current. This current can then be amplified and measured.

What are the applications of infrared phototransistors?

Infrared phototransistors are commonly used in remote controls, motion sensors, and optical communication systems. They are also used in medical devices, such as pulse oximeters, to detect and measure infrared light emitted by the body.

How is an infrared phototransistor different from an infrared photodiode?

An infrared phototransistor and an infrared photodiode are both used to detect infrared light, but they work in different ways. A phototransistor uses a current amplification process, while a photodiode directly converts light into an electrical signal. This makes phototransistors more sensitive and better suited for low light conditions.

What are the advantages of using an infrared phototransistor?

Infrared phototransistors have several advantages, including high sensitivity, fast response time, and low power consumption. They are also small in size, making them ideal for use in compact electronic devices. Additionally, they can be easily integrated into electronic circuits, making them a cost-effective solution for detecting and measuring infrared light.

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