I made a breakout board for this part and after a week found out the that optocoupler was not preforming as it should have. The Fairchild 4N25SM has large enough pin spacing despite being surface mount, that you can easily solder wires directly to the pins for experimentation. This is the way I should have done it in the first place This didnt need a breakout board made for it. Dont waste your time making or purchasing a breakout board for a package size that is large enough to directly solder wires to.
OPTICAL ISOLATOR 4N25 SERIES
The following are a series of descriptions of ideas that I have learned while working with an optocoupler over the last month.ġ. I am writing this after successfully using a Fairchild 4N25 Optocoupler to deliver pulse width modulation from a USB based circuit to the 7.2V circuit in order to control a servo. The idea behind this is that I want to protect the USB based circuit(and my computer) from the large amperages, inductance, higher voltages and other things going on in the RC Car side of the circuit, but still want to be able to control it using a USB device. I want to use an optocoupler for separating a circuit powered by USB (5V) from one powered by a 7.2V RC Car battery.
From what I understand, the MIDI protocol requires the use of optocouplers in all devices. An optocouplter or optoisolator is a cool little device that allows you to completely separate sections of an electrical circuit.
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