The recommended DC input supply is in 9V to 18V range, and so you can use the circuit for watch and direct devices work within the same range (9V-18V). I have used this pretty basic circuit with nifty success for many months, so, let me begin this new article by sharing the tried and tested schematic drawing.įirst segment of the circuit is a linear fixed voltage regulator 7805 (IC1) to provide a stable 5VDC to the rest of the electronics. This simple circuit for DC devices wakes up when the connected output load draws excess current and activates a digital output that is compatible with almost all microcontrollers. Presented here is the basic circuit of an over-current detector built around a handful of easily available and inexpensive electronics components.
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