I claim this isn't a commercial posting as the product doesn't exist yet!
I had a mad idea. What about an electronic circuit breaker built on a small PC board? It would have a non-contact current sense unit (Allegro ACS714 or similar) and a power FET to break the current. There would be a little PIC processor monitoring the sensed current, and it could turn off the FET in case of an overload. The processor could also communicate via a serial link or SPI, to inform some central unit what the current was at any time, or if an overload had occurred. There would be a visible LED to indicate an overload and an optional pushbutton, which could be used to reset the unit. Alternatively, the unit could be programmed to turn power back on every second or so, to provide an automatic reset function.
This wouldn't be intended for any use on the A.C. power line, but I'm thinking of uses at low voltage for benchtop devices or built into equipment where there might be (let's say) motors or heaters that draw low-voltage power and might be overloaded. Actually it might be usable on the A.C. line, but there I think control would have to be via a solid-state relay. To use a FET for control, the power and processor grounds would need to be linked, so it's definitely limited to low-voltage systems.
Do you think you'd ever buy these at (wild guess) $15 each? Could it ever be any use at all?
I had a mad idea. What about an electronic circuit breaker built on a small PC board? It would have a non-contact current sense unit (Allegro ACS714 or similar) and a power FET to break the current. There would be a little PIC processor monitoring the sensed current, and it could turn off the FET in case of an overload. The processor could also communicate via a serial link or SPI, to inform some central unit what the current was at any time, or if an overload had occurred. There would be a visible LED to indicate an overload and an optional pushbutton, which could be used to reset the unit. Alternatively, the unit could be programmed to turn power back on every second or so, to provide an automatic reset function.
This wouldn't be intended for any use on the A.C. power line, but I'm thinking of uses at low voltage for benchtop devices or built into equipment where there might be (let's say) motors or heaters that draw low-voltage power and might be overloaded. Actually it might be usable on the A.C. line, but there I think control would have to be via a solid-state relay. To use a FET for control, the power and processor grounds would need to be linked, so it's definitely limited to low-voltage systems.
Do you think you'd ever buy these at (wild guess) $15 each? Could it ever be any use at all?