Hi, first post so be gentle!!!
I'm looking to make a controller for some heated garments. I've sorted the garments and heating element fine, it all works off a 3cell Lipo battery.
I need to solve two problems.
1) Heat regulation. Each glove/sock draws between 300 and 700 mAh @ 12V depending on how warm they need to be. I have found a circuit based on a NE555, LM393 and a FET (IRF540) which seems to do the job (I need to build and test it.)
2)Battery protection. I need to protect the battery. Lipos go crazy if discharged below 3V per cell so I need a cut off at around 10V to protect them. I was thinking of using a MAXIM 8211 or 8212 voltage detection IC and a relay to disconnect the circuit at 10V or so.
Does this sound feasible? Should I be taking another approach? Can anyone suggest a circuit or give me some ideas on how to proceed?
Cheers
Nigel
I'm looking to make a controller for some heated garments. I've sorted the garments and heating element fine, it all works off a 3cell Lipo battery.
I need to solve two problems.
1) Heat regulation. Each glove/sock draws between 300 and 700 mAh @ 12V depending on how warm they need to be. I have found a circuit based on a NE555, LM393 and a FET (IRF540) which seems to do the job (I need to build and test it.)
2)Battery protection. I need to protect the battery. Lipos go crazy if discharged below 3V per cell so I need a cut off at around 10V to protect them. I was thinking of using a MAXIM 8211 or 8212 voltage detection IC and a relay to disconnect the circuit at 10V or so.
Does this sound feasible? Should I be taking another approach? Can anyone suggest a circuit or give me some ideas on how to proceed?
Cheers
Nigel