Timeline for Is there an easy way to detect when a DC current flows, then close a path?
Current License: CC BY-SA 4.0
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| Jul 4, 2022 at 21:26 | comment | added | Tim Williams | A Hall effect sensor (the magnet sensing switching kind) would do, if a logic level rather than switch closure output is acceptable. | |
| Jul 4, 2022 at 17:53 | comment | added | across | Ohk thank you so there are no simple relay/electromagnet like devices that just close a switch when 20A current flows. I'm already doing your idea: ACS712 current sensor - LM358 opamp - BC548 bjt. It's working fine but the current sensor also requires power supply and comparator requires a pot and BC548 requires two biasing resistors. I ended up with soldering 7 components on a small pcb board just for detecting current! Thanks again! | |
| Jul 4, 2022 at 17:48 | history | answered | Miron | CC BY-SA 4.0 |