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Firmware for the VSD Mk2 This download package includes the HEX and ELF files for the new Variable Speed Drive for Induction Motors. They contain the same code. It just depends on which version of the ST Micro software you use whether you have the option to flash the chip from a HEX or ELF file. A separate source code package is available below. WARNING: do not modify/recompile the source code unless you have experience working with mains-powered/high-voltage DC systems and have enough experience to properly debug and test your changes. Cat No SC0534. Price: Free Files: IMSC_Fimware_hex_080824.zip (ZIP contains .hex and .elf files; 40.9KB) IMSC_Fimware_source_080824.zip (ZIP contains C source code and project files; 5.9MB) Related to: Project: Variable Speed Drive Mk2, Part 1 (November 2024 [print issue] [online issue]) Project: Variable Speed Drive Mk2, Part 2 (December 2024 [print issue] [online issue]) Other items relevant to these projects: Mk2 VSD PCB [11111241 or 9048-02] ($15.00) Add to trolley STM32G030K6T6 programmed for the VSD Mk2 [1111124A] ($10.00) Add to trolley VSD Mk2 PCB pattern (PDF download) [11111241] (Free) Add to trolley Mk2 VSD drilling & cutting diagrams (Free) Add to trolley