Been working on my second electric longboard and wanted to upgrade the anti spark switch a bit. This is mostly the same to vedder’s antispark, with the changes being an additional FET, an additional resistor as per fechter’s 3b revision to the schematic (below) and an upgraded fuse, using the same fuse as used on JTAG’s BMS, available in many different ratings. The last two changes are larger trace sizes to better handle current and an option to supply 12V/5V power for an LED switch.
fechter schematic My schematic Front of PCB Rear of PCB
Board dimensions are 42mm H x 63.25mm W and will be made using 2oz copper. The plan is to look over the design once more in the next day or so and order hardware right afterwards.
Feedback is welcome! If anyone sees anything wrong please let me know. I’ve also got a power distribution board in the works for supplying 12V and 5V loads as I have plans for lots of LED’s, as well as my own BMS, more info on all of that later.
Finally, a link to my github repo as well as a mention that all credit goes to vedder and fechter for the original hardware and schematic designs. https://github.com/msglazer/Anti-Spark_Switch