Optocouplers come in a wide variety of types and configurations. Moreover, it could potentially allow you to automate the circuit control by adding electronic components.
This would allow you to control even higher amounts of voltage and current. For instance, we could add a transistor to the second circuit without interfering with the first in a two-circuit configuration. This is largely due to how it facilitates galvanic isolation between two separate circuits. Consequently, this allows the two interconnected circuits to use different voltages and currents.įurthermore, it allows you to expand your device’s capabilities. The optocoupler prevents this damage from occurring in both circuits.Īdditionally, the optocoupler will only allow electrons to flow in one direction because of its semiconductor materials. Without the optocoupler isolating the circuits, these disruptions may spread to the second circuit and cause destruction. Sometimes voltage spikes and noise may occur in one circuit. This is one of its more important attributes. We can use the optocoupler to transfer electronic signals between two isolated circuits. This is especially true for TRIAC optocouplers.Įlectronic Microchips in a white background How Does an Optocoupler Work? It’s easy to mistake an optocoupler with an Integrated Circuit/microchip ( IC) because of how it looks. This allows the first circuit to control the second circuit. The first circuit will connect across the first two pins (pin 1 and 2), while the second circuit will connect to the last two pins (pin 3 and 4). Nevertheless, the optocoupler is essentially a solid-state relay that interconnects two separate electronic circuits. Accordingly, we use it to identify the type of optocoupler and also find the manufacturer’s datasheet. The body also contains some text bearing the optocoupler’s part number. It allows us to identify the different pins. The first pin is the anode, the second is the cathode, the third is the collector, and the fourth is the emitter.Īdditionally, there is a circular indentation on the corner of the main body near the first pin. Generally, the most basic types consist of a rectangular body with four pins. Nevertheless, optocouplers are integrated electronic components. Some people may even refer to them as options. You may refer to it as an optoisolator, photocoupler, optical coupler, optical isolator, or just optocoupler. In it, we’ll explore the optocoupler, its various types, and how it can benefit you and your project. This is what the following guide hopes to elucidate. With all the PCB components and options available on the market, it’s hard to decide which will suit your project the best.įor instance, you may be wondering what an optocoupler does and how it is different from any other relay.
Can be controlled directly by microcontroller such as Arduino, 8051, AVR, PIC, DSP and ARM.Can control various appliances with large current and high voltage.Configureable Activation Logic, High or Low, via mini jumper.If you need to control AC or high current, high voltage load, this will be the perfect board. Easy to use and suitable for beginner, and of course student too. It even comes with activation LED indicator for the relay. The control signal is opto-isolated, protected. This is ready breakout board with one (single) 5V activated relay, with 3 screw terminals for the relay (NO, NC, COM) and screw terminals for control signal from microcontroller such as Arduino. This is the universal Relay breakout board and we like it. In simple words, the relay can be configured as 5V(High) activation or 0V(Low) activation.
Extra isolation with opto-coupler at the front end of control, and the activation logic for relay is configureable via a mini jumper. It comes with 1(single) channel 5V activation relay, ready to control 250VAC at 10A. Allow electronics with low voltage to control high power load, example from Arduino to AC light bulb.Isolation of low voltage system against high voltage system, example 5VDC and 240VAC.Relays are always good to have especially for electronics projects.
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