Opto-Isolator Breakout Board (BOB-09118)

(2 customer reviews)

£4.74 inc VAT

Availability: 1 in stock

Brand: SparkFun
Part Number: BOB-09118
Barcode: 5055421009199
SKU: PPBOB-09118 Categories: , , Tags: ,
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Opto-Isolator Breakout – SparkFun BOB-09118

This is a board designed for opto-isolation. This board is helpful for connecting digital systems (like a 5V microcontroller) to a high-voltage or noisy system. This board electrically isolates a controller from the high-power system by use of an opto-isolator IC. This IC has two LEDs and two photodiodes built-in. This allows the low-voltage side to control a high voltage side.

We often use this board to allow a microcontroller control servos or other motors that use a higher voltage than the TTL logic on the (3.3V or 5V) micro, and may cause electromagnetic interferance with our system as the motors turn on and off. This board will isolate the systems, creating a type of electrical noise barrier between devices.

This breakout board uses the ILD213T optoisolator and discrete transistors to correct the logic. Comes with two channels. Great for use in noisy circuits where signal lines require electrical isolation.

A normal LED opto-isolator will invert the logic of a signal. We threw some transistors on this compact board to correct the inversion. What you put into the IN pins, will be replicated on the the OUT pins, but at the higher voltage (HV).

Opto-Isolator Schematic:

Opto-Isolator Schematic


2 reviews for Opto-Isolator Breakout Board (BOB-09118)

  1. Tim

    I purchased this product to isolate a 12v automotive input from a 5v Arduino. This works perfectly with the 12v on the low side, and the Arduino on the high side, technically the opposite way round to the design, but it works fine.My only issue is the

  2. dr john sm

    great little unit, solves a few space problems.To improve ? pads on back to bypass the led resistors,isolate inputs, using free input pad, not a common return, so can attach to two different ground voltage sources.a single input / output version

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