Optocoupler Interfacing With Avr Pic And 8051

What are the uses of slotted optocoupler modules

When an object passes through the slot, it interrupts the infrared light beam, causing a change in the output signal. Slotted Optocoupler - A slotted optocoupler has a slot moulded into the package between the LED light source and the phototransistor light sensor; the slot houses transparent windows, so that the LED light can normally freely reach the face of transistor, but can be interrupted or blocked via. The Infrared Slotted Optical Optocoupler Module is a device that uses infrared light to transmit signals between two electrically isolated circuits. Unlike transformers or capacitors, which can only transfer AC signals across the isolation barrier, optocouplers can.