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EEZ H24005: a dual-channel, open source power supply
The EEZ Open project is an attempt to bridge the gap between T&M tools for hobbyists and students and the tools relied on in commercial, professional environments. It does that by combing the best of both sides.
The EEZ H24005 is composed of the following parts and modules:
- AUX PS module
- Power board (one per channel, two in total)
- Arduino shield
- Metal enclosure
- Nuts, bolts, and electromechanical parts
- Wire harness
- Arduino Due
- 3.2” TFT color touch-screen display (carried by Arduino shield)
- AC/DC power module, 48 VDC, 155 W, (one per channel, two in total)
EEZ Complete documentation and the open source software is available on GitHub repositories, one for the hardware and one for the software. The EEZ H24005 power supply is now in its fifth revision, with three public releases completed. Firmware M3 (milestone 3) was completed in December, 2016, with support for a comprehensive SCPI command set and a TFT color touch-screen display. The command set is documented in a 100+ page SCPI reference guide.
The EEZ Open software suite currently consists of two tools:
- Firmware simulator is a “virtual instrument” for exploring and testing all functionality without needing the physical device on hand.
- EEZ Studio is a powerful WYSIWYG development tool for creating and editing the menus and pages on a local display (in this, the color TFT touch-screen on the H24005).
Both applications run on multiple OS’s (Linux, Windows, OS X, etc.) with the Arduino IDE supported as a first target platform. They chose it because it’s also open source and cross-platform and well known within the DIY and maker communities. Modifying existing code, adding code to achieve new functionality, or simply uploading to a new firmware releases shouldn’t be a problem.
The EEZ H24005 is fully free and open source, it provides a level of independence and hackability that simply doesn’t exist with proprietary, traditional tools.
Keep in mind that the H24005, unlike any other power supply, provides these unique features:
|Local user interface||3.2” TFT color touch-screen and encoder knob|
|Channel coupling||Serial (up to 80 V), Parallel (up to 10 A) using built-in power relays (no external wiring is required)|
|Remote sense||Doesn’t need external wiring thanks to built-in signal relays|
|Digital control||Arduino Due (or compatible) 32-bit ARM MCU board|
|Power control||AC In-rush current limiter|
|Remote/external voltage programming||Surge protected, 2.5 V for full scale operation|
|Battery temperature monitoring||Opto-isolated V/F input (for battery NTC)|