The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

The New Hotness

  • LV Interface Board: +7 V Regulator

    This takes most of the load off the Arduino Pro Mini’s teeny SMD regulator by knocking the +12 V ATX supply down to +7 V:

    LV Power Interface - 7 V Regulator
    LV Power Interface – 7 V Regulator

    It’s on the heatsink beyond the ATX connector at the right edge of the board:

    Low Voltage Interface Board - detail
    Low Voltage Interface Board – detail

    It also provides a (more) stable voltage for the current sense amp than you can reasonably expect directly from the ATX power supply:

    Current Sense Amp - schematic
    Current Sense Amp – schematic

    Not much to it: the thing Just Works…