> **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

# Qwiic Distance Sensor - RFD77402

**Type:** Product page · **SKU:** SPX-14343 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/qwiic-distance-sensor-rfd77402.html ([markdown](https://core-electronics.com.au/qwiic-distance-sensor-rfd77402.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The Qwiic Distance Sensor uses the new RFD77402 Time of Flight sensor. This sensor is special in that it uses an infrared VCSEL or vertical-cavity surface-emitting laser to measure the amount of time it takes to bounce off a target. This allows low-cost millimeter readings up to 2 meters!

The VCSEL is a class 1 laser product so it is safe for almost all applications. The sensor doesn’t emit visible light but most cell phones can see it!

We’ve written an [RFD77402 Arduino library](https://github.com/sparkfun/SparkFun_RFD77402_Arduino_Library) available for download through the integrated Arduino library manager.

The Qwiic system enables fast and solderless connection between popular platforms and various sensors and actuators. You can read more about the Qwiic system here. We carry [50mm](https://core-electronics.com.au/search/?q=14206), [100mm](https://core-electronics.com.au/search/?q=14205), [200mm](https://core-electronics.com.au/search/?q=14204), [500mm](https://core-electronics.com.au/search/?q=14327), and [breadboard friendly](https://core-electronics.com.au/search/?q=14207) Qwiic cables.

We do not plan to regularly produce SparkX products so get them while they’re hot!

 **Experimental Product:** [SparkX](https://www.sparkfun.com/sparkx) products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our [forum](https://forum.sparkfun.com/) for support or to ask a question. **Features:**

- Operating Voltage: 3.3V
- Current: 7mA average at 10Hz
- Measurement range: ~50mm to 2,000mm
- Precision: +/-10%
- Light source: VCSEL 850nm light source
- Field of view: 55°
- Field of illumination: 23°
- Max read rate: 10Hz (in practice we’ve seen nearly 20Hz)
- Dual Qwiic connectors for fast connection and optional daisy-chaining
- I2C Interface up to 1MHz
- On-board 4.7k pull up resistors (removable via jumper)
 
**Documents:**

- [RFD77402 Brochure](https://cdn.sparkfun.com/assets/parts/1/2/3/1/9/RFD77402_Brochure.pdf)
- [Schematic](https://cdn.sparkfun.com/assets/parts/1/2/3/1/9/Qwiic_Distance_Sensor_-_RFD77402.pdf)
- [KiCad Files](https://cdn.sparkfun.com/assets/parts/1/2/3/1/9/RFD77402_ToF_Sensor.zip)
- [RFD77402 Arduino Library](https://github.com/sparkfun/SparkFun_RFD77402_Arduino_Library)
- [Arduino sketches](https://cdn.sparkfun.com/assets/parts/1/2/3/1/9/RFD77402_Examples.zip)
- To get the latest files please visit the [GitHub repo](https://github.com/sparkfunX/Qwiic_Distance-RFD77402)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/t/o/tofquarter.jpg)