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

  • MP1584 Current Regulator: Arduino Blinkiness

    Mostly because I wanted to verify that it really worked:

    MP1584 current - red LED - Arduino blinkiness
    MP1584 current – red LED – Arduino blinkiness

    The Arduino Nano runs the default Blink program that all the knockoff manufacturers use as their final QC test.

    The MP1584 specs say the Enable input can accept a logic signal up to 6 V, the Nano runs at 5 V regulated down from the 6.3 V from the bench supply, and the 1 W red LED now flashes 1 s ON / 1 s OFF.

    The current feedback works as it did before, too, which is comforting.

    The Nano adds 20 mA to the bench supply, so the whole affair runs at 220 mA = 1.4 W. Of course, it’s now at a 50% duty cycle, so that helps.

    I doubt hand-hewing an astable multivibrator is the right way to add blinkiness, but it’d definitely be playing on hard mode.