Hi,
First of all, I can build circuits but Im not the best on the design side.
I am looking to make a circuit that monitors a fan, if it is running I want to switch a 1.5a load. I have been looking and looking and looking but all i can find is fan failed circuits like the one here:
**broken link removed**
or maybe the use of MAX6684 IC
This is a batery operated circuit so power usage to the min if possible. I considered the use of the fan signal wire to drive a mosfet but the signal is not strong enough. Any suggestions?
To understand how this is being used. I have a thermostat circuit that will provide upto 200mA, this should be enough to drive a small fan and the above monitor circuit (if not I will amend so it can provide more), when the fan is switched on the monitor circuit will turn a PTC Heater on, when the temp rises the fan turns off and thus the heater.
If the fan is damaged/rota locked then the heater will not function.
Thanks in advance
First of all, I can build circuits but Im not the best on the design side.
I am looking to make a circuit that monitors a fan, if it is running I want to switch a 1.5a load. I have been looking and looking and looking but all i can find is fan failed circuits like the one here:
**broken link removed**
or maybe the use of MAX6684 IC
This is a batery operated circuit so power usage to the min if possible. I considered the use of the fan signal wire to drive a mosfet but the signal is not strong enough. Any suggestions?
To understand how this is being used. I have a thermostat circuit that will provide upto 200mA, this should be enough to drive a small fan and the above monitor circuit (if not I will amend so it can provide more), when the fan is switched on the monitor circuit will turn a PTC Heater on, when the temp rises the fan turns off and thus the heater.
If the fan is damaged/rota locked then the heater will not function.
Thanks in advance