fghorow@gmail_com
New member
Hi All,
I'm finally stuffing/soldering my board, and I have a question about internal vs. external charging.
My battery is a 25.6V 6.6Ah LiFePO4 pack, with an onboard Battery Management System and a matching external charger.
For those in the U.S., the specific pack I bought is here , and the charger is this one . That battery pack fits in the chassis kit aft of one of the driver motors and to the side of the blade motor and its bracket. It was a fairly long search to find a pre-built pack that fits, and that _should_ give me about 2 hours or running time -- at 85 Watts -- for my way, way too big lawn. Note that the battery pack is considered "hazardous material" and needs to be shipped by ground...
On the v1.2 PCB, I'm unsure about which (if any) of R9 through R13 (for the voltage divider bridge) and any associated other discrete components need to be on the board to fit my situation using an external charger.
Also, In order to run the fancy (Java based) ~cm level GPS algorithm I discussed in another thread, I'm using a Udoo quad -- which is supposed to be "compatible" with the Arduino Due. In particular, it needs to be fed 3.3V instead of 5V. It appears from the limited understanding I could gather via Google Translate of the German discussion, the V1.2 board is able to be configured to run the Arduino Due at 3.3V, but I am not sure _how_ to actually do that on the board.
Any advice would be greatly appreciated!
Many thanks,
Frank Horowitz
I'm finally stuffing/soldering my board, and I have a question about internal vs. external charging.
My battery is a 25.6V 6.6Ah LiFePO4 pack, with an onboard Battery Management System and a matching external charger.
For those in the U.S., the specific pack I bought is here , and the charger is this one . That battery pack fits in the chassis kit aft of one of the driver motors and to the side of the blade motor and its bracket. It was a fairly long search to find a pre-built pack that fits, and that _should_ give me about 2 hours or running time -- at 85 Watts -- for my way, way too big lawn. Note that the battery pack is considered "hazardous material" and needs to be shipped by ground...
On the v1.2 PCB, I'm unsure about which (if any) of R9 through R13 (for the voltage divider bridge) and any associated other discrete components need to be on the board to fit my situation using an external charger.
Also, In order to run the fancy (Java based) ~cm level GPS algorithm I discussed in another thread, I'm using a Udoo quad -- which is supposed to be "compatible" with the Arduino Due. In particular, it needs to be fed 3.3V instead of 5V. It appears from the limited understanding I could gather via Google Translate of the German discussion, the V1.2 board is able to be configured to run the Arduino Due at 3.3V, but I am not sure _how_ to actually do that on the board.
Any advice would be greatly appreciated!
Many thanks,
Frank Horowitz