phlegmy
- 120
- 0
Hello knowledgeable ones!
I need your help to make my life easier;
Background.
I need to turn on fans every cold night during winter in a grain storage shed
to keep the grain from heating/rotting! This involves treking to the shed in the cold after
midnight (cheap electricity) and flipping 2 circuit breakers on the wall to activate the fans...
The fans are just single phase induction motors (around 1.7kw) which plug directly into a standard electrical outlet (240v). The Motors on the fans each have a black box with all the bits nescessary for them to start up etc.
The Idea.
I want to build a device containing a clock and a temprature sensor, which will close a contact after midnight if the temprature is less than 6 deg c. and open the contact
at 7am
The idea is that you would plug this device into the wall outlet and plug the fan into the device.
HELP:
I've figured what i need to make and break the circuit is something called a CONTACTOR, but I'm stumped as to what one i need. The Clock and temprature sensor would be implemented on a microcontroller which would give the signal to the contactor to start the fans. So basically i need a device that would take a low voltage DC input (prob 9V or less) and close a switch to carry about 7A at 240Vac.
Any ideas?
I need your help to make my life easier;
Background.
I need to turn on fans every cold night during winter in a grain storage shed
to keep the grain from heating/rotting! This involves treking to the shed in the cold after
midnight (cheap electricity) and flipping 2 circuit breakers on the wall to activate the fans...
The fans are just single phase induction motors (around 1.7kw) which plug directly into a standard electrical outlet (240v). The Motors on the fans each have a black box with all the bits nescessary for them to start up etc.
The Idea.
I want to build a device containing a clock and a temprature sensor, which will close a contact after midnight if the temprature is less than 6 deg c. and open the contact
at 7am
The idea is that you would plug this device into the wall outlet and plug the fan into the device.
HELP:
I've figured what i need to make and break the circuit is something called a CONTACTOR, but I'm stumped as to what one i need. The Clock and temprature sensor would be implemented on a microcontroller which would give the signal to the contactor to start the fans. So basically i need a device that would take a low voltage DC input (prob 9V or less) and close a switch to carry about 7A at 240Vac.
Any ideas?