> **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

# SparkFun OpenScale

**Type:** Product page · **SKU:** SEN-13261 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-openscale.html ([markdown](https://core-electronics.com.au/sparkfun-openscale.html.md))

The SparkFun OpenScale is a simple-to-use, open source solution for measuring weight and temperature. It has the ability to read multiple types of load cells and offers a simple-to-use serial menu to configure calibration value, sample rate, time stamp and units of precision.

## Pricing

- **Price:** $65.50 (inc GST) — $59.55 AUD, exc GST
- **Quantity discounts:** 5+ $57.76 (exc GST) · 25+ $56.56 (exc GST) · 100+ $54.18 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN-13261:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN-13261:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **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 SparkFun OpenScale is a simple-to-use, open source solution for measuring weight and temperature. It has the ability to read multiple types of load cells and offers a simple-to-use serial menu to configure calibration value, sample rate, time stamp and units of precision.

Simply attach a four-wire or five-wire load cell of any capacity, plug the OpenScale into a USB port, open a terminal window at 9,600bps, and you’ll immediately see mass readings. The SparkFun OpenScale will enable you to turn a load cell or four load sensors in a Wheatstone bridge configuration into the DIY weigh scale for your application.

The OpenScale was designed for projects and applications where the load was static (like the beehive in front of SparkFun HQ) or where constant readings are needed without user intervention (for example, on a conveyor belt system). A load cell with an equipped OpenScale can remain in place for months without needing user interaction!

On board the SparkFun OpenScale is the ATmega328P microcontroller, for addressing your communications needs and transferring your data to a serial terminal or to a data logger such as the [OpenLog](https://core-electronics.com.au/search/?q=13712), an FT231 with mini USB, for USB to serial connection; the HX711, a 24-bit ADC for weigh scales; and the TMP102, for recording the ambient temperature of your system. The OpenScale communicates at a TTL level of 9,600bps 8-N-1 by default and possesses a baud rate configurable from 1,200bps to 1,000,000bps.

Features:

- Operating Voltage: 5V
- Operating Ampage: 80-100mA
- Power Cycling above 500ms
- Selectable 10SPS or 80SPS Output Data Rate
- Local & External Temperature Sensors
- Fixed & Adjustable Gain
 
Documents:

- [Schematic](https://core-electronics.com.au/attachments/localcontent/SparkFun_OpenScale_96143c6acbf.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/SparkFun_OpenScale_19263468f62.zip)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/openscale-applications-and-hookup-guide)
- [Arduino Library](https://core-electronics.com.au/attachments/localcontent/SparkFun_OpenScale_Arduino_14543b31004.zip)
- [Particle Sketch](https://core-electronics.com.au/attachments/localcontent/SparkFun_OpenScale_Particle_37934c6ff7.zip)
- [GitHub](https://github.com/sparkfun/OpenScale)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen-13261.jpg)