> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Opto-isolator Breakout

**Type:** Product page · **SKU:** BOB-09118 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/opto-isolator-breakout.html ([markdown](https://core-electronics.com.au/opto-isolator-breakout.html.md))

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.

## Pricing

- **Price:** $10.35 (inc GST) — $9.41 AUD, exc GST
- **Quantity discounts:** 5+ $9.13 (exc GST) · 25+ $8.94 (exc GST) · 100+ $8.56 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 7 today, and up to 500 more in 5–11 days.

## How to buy

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## Description

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).

**Documents:**

- [Schematic](https://core-electronics.com.au/attachments/localcontent/Optoisolator-v12_12117cd299e.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/Optoisolator-v12_167171ecb2d.zip)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/ild205t_11794243079.pdf) (ILD213T)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/o/p/opto-isolator_breakout__bob-09118__01.jpg)