This design (see the figure) provides a simple solution to the interface ... a regulated output that can supply power to the microcontroller. The circuit’s current capacity is limited to 7.5 ...

1). Microcontroller U1 is "fused" to run off its internal, 128-kHz watchdog oscillator. Since U1 idles when it has nothing to do, its power consumption is less than 1 mW. With a few simple parts ...

Unlike SBCs, microcontrollers have a high learning ... you don’t need the skills of a DIY god just to create some simple ...