I have (finally) made a proper PCB and am offering an LVD / battery saver kit.
This is based on the Custom Arduino-based LVD, but incorporates a 60A N-channel MOSFET. For simplicity's sake, this has a single MOSFET for switching on the ground side. While the components are rated high, it's probably best for relatively low draw (~5A). For high-draw components you can easily use the LVD to fire an automotive electromechanical relay and drive as much current as you like!
This LVD project is offered as a "solder-it-yourself" kit, with all components needed to install it:
- The LVD PCB
- all required components
- programmed ATtiny85
- 3 terminal lugs & 3 nuts/bolts
- an attractive heat-shrink cover
- magic calibration tool
The "plug-n-play" version is all of the above PLUS I solder it up, test, and calibrate. You just plug it in to your application. Shipping now!
All of the above is "open" (open source, open hardware) -- you may download and modify my designs, or order and build them yourself, for noncommercial purposes. I ask that you maintain my copyright, and please let me know if you use the project for something cool.
Usage and setup instructions are here!