Hello there.
I have this project of mine to buld a thermostat using a pic 12F683.
The purpose of this project is to ventilate and cool a cabinet where I have my router, switch and UPS.
The cabinet is roughly 40x40x40 cm and I have a 12 v 12 cm fan 0,36 A.
My problem is, how do I power this setup? I need to have a dual supply, 12v and 5v.
I was thinkin several option:
Two china made adapters, to power 5v and 12v. I really would prefer not going that way, More wasted heat and we all know the quality of those.
I have some adpaters from old phones that give 5v. I could then charge pump it to near 12v. I rather like this one but I have no idea how to build it.
Hacking the UPS and take the 12v directly from the battery to power the fan but then how do I power the pic? A 7805 is out of the question because of the wasted heat at that voltage difference. A switching regulator is a better option but I don't have any.
Any advice, ideas?
I have this project of mine to buld a thermostat using a pic 12F683.
The purpose of this project is to ventilate and cool a cabinet where I have my router, switch and UPS.
The cabinet is roughly 40x40x40 cm and I have a 12 v 12 cm fan 0,36 A.
My problem is, how do I power this setup? I need to have a dual supply, 12v and 5v.
I was thinkin several option:
Two china made adapters, to power 5v and 12v. I really would prefer not going that way, More wasted heat and we all know the quality of those.
I have some adpaters from old phones that give 5v. I could then charge pump it to near 12v. I rather like this one but I have no idea how to build it.
Hacking the UPS and take the 12v directly from the battery to power the fan but then how do I power the pic? A 7805 is out of the question because of the wasted heat at that voltage difference. A switching regulator is a better option but I don't have any.
Any advice, ideas?