> **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 # Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module **Type:** Product page · **SKU:** DFR1034 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/gravity-gp8503-2-channel-12bit-i2c-to-0-25vvcc-dac-module.html ([markdown](https://core-electronics.com.au/gravity-gp8503-2-channel-12bit-i2c-to-0-25vvcc-dac-module.html.md)) High-resolution, high-precision, dual-channel DAC voltage output module. Suitable for control projects within 3.3V, such as motor speed control, lighting... ## Pricing - **Price:** $16.70 (inc GST) — $15.18 AUD, exc GST - **Quantity discounts:** 6+ $14.42 (exc GST) · 12+ $13.82 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 19 and Aug 24. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR1034:1` (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/DFR1034:1.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 This is a 2-channel analog voltage output DAC module with I2C communication, 12-bit resolution, and 0.1% precision. It is well-suited for control projects operating within the 3.3V range, such as ESP32, Raspberry Pi, STM32, and other microcontrollers that require analog signal output. DAC series modules are a range of products that can be controlled through I2C or PWM signals to generate voltage or current output signals. This series of DAC products not only offers a variety of output signal ranges, but also provides three selectable resolutions: 8-bit, 12-bit, and 15-bit. It allows for the choice of either single-channel or dual-channel configurations, and multiple modules can be cascaded to form a multi-channel output. ![Functional Diagram of Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module](https://core-electronics.com.au/attachments/localcontent/DFR1034-GP8503-FUN-en_675369d101a.png) Functional Diagram of Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module ![Wiring Diagram of Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module](https://core-electronics.com.au/attachments/localcontent/DFR1034-GP8503-CON_16341b3db0c.png) Wiring Diagram of Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module and Arduino UNO We provide various models of DAC modules. If you need a different model, please check the selection guide: **[Click here to get Selection Guide of DAC Modules](https://www.dfrobot.com/blog-13458.html)** ### Features 10. Support 3.3V-5V power supply. 11. Output voltage error is less than 0.1%. 12. Output voltage linearity error is 0.1%. 13. Two channels of voltage output, either 0-2.5V or 0-VCC, enabling connection and control ofstandard analog voltage devices. 14. Gravity interface, I2C communication, Arduino control, suitable for program automationcontrol. ### Applications 16. Motor rotational speed regulation 17. Sonorous intensity modulation 18. Indoor and outdoor luminance modulation 19. Display panel backlight automatic adjustment ### Specification 21. Operating voltage: 3.3V to 5V 22. Communication Method: I2C 23. Chip Type: GP8503 24. Resolution: 12-bit 25. Output Voltage: 0-2.5V or 0-VCC 26. Number of channels: 2 channels 27. Value Range: 0 - 4095 corresponding to 0-2.5V or 0-VCC 28. Output voltage: 0.1% 29. Output voltage linearity error: 0.1% ### Documents 31. [Product wiki](https://wiki.dfrobot.com/SKU_DFR1034_2_Channel_12bit_I2C_to_0-VCC_DAC) ### Parts List 33. GP8503:2-Channel 12bit I2C to 0-2.5V/VCC DAC Module ×1 34. Gravity-4P I2C/UART Sensor Cable × 1 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/D/F/DFR1034-1.jpg)