Hello,
I have a microcontroller controling some home appliances (220v) with some relays.
When each relay is closed, these apliances may be consuming power or not, because each one of them have their own switch (some are floodlights with presence detector, water boiler with its own thermostat, etc.).
I'd like to know when the appliances are really on (consuming power), because turning it on with the relay cannot tell me for sure (the internal switch may be on or off). For each appliance I have a ucontroller output port, driver and relay, and will have an input port that will tell if the appliance is consuming or not.
I have initially aproached this problem with a current detector and ADCs, but in some cases the current flow is so low that it wasn't detecting the difference.
I believe I need to aproach this problem differently. Any suggestions?
Basically I need a circuit that detects that the appliance circuit is closed (relay and internal switches) and then puts a ucontroler pin at "1".
Any suggestion?
Thanks,
Jabss
I have a microcontroller controling some home appliances (220v) with some relays.
When each relay is closed, these apliances may be consuming power or not, because each one of them have their own switch (some are floodlights with presence detector, water boiler with its own thermostat, etc.).
I'd like to know when the appliances are really on (consuming power), because turning it on with the relay cannot tell me for sure (the internal switch may be on or off). For each appliance I have a ucontroller output port, driver and relay, and will have an input port that will tell if the appliance is consuming or not.
I have initially aproached this problem with a current detector and ADCs, but in some cases the current flow is so low that it wasn't detecting the difference.
I believe I need to aproach this problem differently. Any suggestions?
Basically I need a circuit that detects that the appliance circuit is closed (relay and internal switches) and then puts a ucontroler pin at "1".
Any suggestion?
Thanks,
Jabss