• Have you tried just using a meter in current measuring mode rather than going across a resistor? I put a big (47uF) across it just to make sure any spikes are levelled out.

    I did try just now with a Pico 1.4 (I'd been using a Pico 1.3 before) plugged into breadboard and the power consumption seemed a lot higher as you say (in the 0.5mA range).

    However, after having put all the pins into input mode and then connected them to ground (not B6/B7 as these default to serial when USB is unplugged) I get back down to 30uA

    setInterval(function() {
      digitalWrite(LED1, 1);
      setTimeout(function () {
        digitalWrite(LED1, 0);
      }, 20);
    }, 10000);

    Maybe someone else could give theirs a go?

    I'm still really confused about why my 1v4 and 1v3 should be behaving differently though. The circuit itself is the same on the two revisions (just with the addition of a fuse, which isn't used for battery power).


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