I have an friend's fairly expensive espresso machine in pieces in my living room due to electrical "problems." The (indeterminate far east supplier) blatantly omitted about half the input side circuitry, including the supply filtering. Numerous components identified on the PCB were never installed.
One lonely resistor protected the IC V_in for far longer than I would have imagined possible (years) before exploding.
As someone who is actively working to increase my electrical circuit-related design chops, intuiting how this thing continued to operate has been an interesting exercise.
One lonely resistor protected the IC V_in for far longer than I would have imagined possible (years) before exploding.
As someone who is actively working to increase my electrical circuit-related design chops, intuiting how this thing continued to operate has been an interesting exercise.