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  1. 12V Battery SOC Monitor

    Batteries and Charging
    I have designed and built a flexible and efficient battery charge monitor, in this case for a 12V lead-acid battery, but the same basic design can be used for multiple batteries or lithium cells. The basic circuit consists of a Microchip PIC16F1825, which reads the battery voltage using a...
  2. A simpler digital battery monitoring system

    Batteries and Charging
    Hi all, I've been working on a system to digitally monitor cell voltages for lithium EVs, and send those voltage readouts to some sort of controller so the driver/owner knows about battery charge (and pack health) the pack charger knows when to stop charging (HVC cutoff) The closest existing...
  3. 12V SLA/FLA BMS/Charger Design

    Batteries and Charging
    As I am planning to go ahead with my electric tractor conversion, and will use 12V SLAs (for low cost, where more weight is good, and usage will be only occasional). So I want to make a fairly simple but effective charging system and BMS for a string of 4 to 24 SLA batteries or even a single...
  4. Batt Bridge Mk2?

    Batteries and Charging
    Please help me here if my idea is complete crap and will end up melting things down horribly. I'm wanting to put a Lee Hart Batt Bridge on my 48v pack. However, while playing around with it in a circuit simulator, the potential difference needed to light an LED was much too great for my...
  5. Zilla Viewer

    Technical Discussion
    Am I the only one who didn't know about Zilla Viewer? Uses the DAQ data from the Zilla to give real time dials or guages so you can see what the amps, voltages, rpm, controller temp, ect... Found it at and used it to see my Zilla's temp going nuts. Here's...