The signal (line and return) may be used to drive the LED in an opto-isolator.

The opto-isolator must be a high-speed type, with less than 2 μs risetime.

The physical layout of an opto-isolator depends primarily on the desired isolation voltage.

A common type of opto-isolator consists of an LED and a phototransistor in the same package.

An opto-isolator connects input and output sides with a beam of light modulated by input current.

An LED may be paired with a photodiode or phototransistor in the same package, to form an opto-isolator.

However, there was no provision for an accessory, and its motion sensor was based on a cheaper reed switch instead of an opto-isolator.

The current loop on the transmitter side drives the LED of an opto-isolator on the receiver side.

American guitar and organ manufacturers of the 1960s embraced the resistive opto-isolator as a convenient and cheap tremolo modulator.

The two parts of the ADC may be widely separated, with the frequency signal passed through an opto-isolator or transmitted wirelessly.

RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds.

In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light.

The simplest bidirectional opto-isolator is merely a pair of LEDs placed face to face and held together with heat-shrink tubing.

Solid-state relays built around MOSFET switches usually employ a photodiode opto-isolator to drive the switch.

An optocoupled solid state relay contains a photodiode opto-isolator which drives a power switch, usually a complementary pair of MOSFETs.

The main function of an opto-isolator is to block such high voltages and voltage transients, so that a surge in one part of the system will not disrupt or destroy the other parts.

But LEDs, like all semiconductor diodes, are capable of detecting incoming light, which makes possible construction of a two-way opto-isolator from a pair of LEDs.

Many of Don Buchla's designs, including the Low-Pass Gates (later called Dynamic Managers) contain vactrols, photoresistive opto-isolator employed as voltage-controlled potentiometers, which contribute to a very "natural" Buchla sound.

The voltage difference is normally 0 volts (both at positive potential referenced to ground) in the idle state, which is seen as a '1' at the MIDI receiver due to logic inversion by the Opto-isolator.

The earliest and the slowest but still common 4N35 opto-isolator, for example, has rise and fall times of 5 μs into a 100 Ohm load and its bandwidth is limited at around 10 kilohertz - sufficient for applications like electroencephalography or pulse-width motor control.

Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other.