What is the point of an Optocoupler?
An Optocoupler can do the job. Let there be light! This device allows you to transmit an electrical signal between two isolated circuits with two parts: an LED that emits infrared light and a photosensitive device which detects light from the LED.
What is the advantage of placing an optoisolator between the motor and the microcontroller?
The main advantage of opto-couplers is their high electrical isolation between the input and output terminals allowing relatively small digital signals to control much large AC voltages, currents and power.
How are optocouplers used in an electrical system?
Optocouplers also make it convenient to control the connection between two circuits by connecting and disconnecting them via an optocoupler. Optocouplers are extensively used in electronics, electrical, and communications systems. Optocouplers are often used to reject back EMF, noise, and electrical surges from entering an MCU circuit.
Why are optocouplers more sophisticated than fuses and fuses?
Optocouplers can avoid a great deal of cost in replacing components by protecting them. However, optocouplers are more sophisticated than fuses. Optocouplers also make it convenient to control the connection between two circuits by connecting and disconnecting them via an optocoupler.
How many milliamps can an optocoupler handle?
Typical optocouplers can handle input and output currents from a few microamps to tens of milliamps. There are many optocouplers on the market and to find the most appropriate for a particular purpose, vendor’s catalogues and manufacturers datasheets should be studied.
When do I need to replace my optocoupler?
In color TV, display and other switching power supply maintenance, if the optocoupler is damage, it must be replaced by linear optocoupler. The commonly used 4-pin linear optocouplers: PC817A, PC111, TLP521 and so on.