This is an attempt to make a circuit using what's in the shoebox to control the fan on my furnace. <a>http://freewebs.com/adub/furnace%20circuit.gif</a>
We heat our small house with a pellet stove in the living room.
I'd like to control the on/off of the HVAC fan to circulate heat to all the rooms.
The program is not the problem. Simple timer on for say 10 minutes off for 50 minutes with two trimmers on pin1 and 2 to adjust the times for on/off using ADC.
Problem is: I have a 12 volt dc relay and the furnace is on 24VAC. What values should I use for the capacitors/resistors?
Do you see anything else wrong/missing?
Would usually just experiment but the evenings are starting to get cold! Winter is almost here in Missouri, USA.
Thanks for any/all help.
Arvin
We heat our small house with a pellet stove in the living room.
I'd like to control the on/off of the HVAC fan to circulate heat to all the rooms.
The program is not the problem. Simple timer on for say 10 minutes off for 50 minutes with two trimmers on pin1 and 2 to adjust the times for on/off using ADC.
Problem is: I have a 12 volt dc relay and the furnace is on 24VAC. What values should I use for the capacitors/resistors?
Do you see anything else wrong/missing?
Would usually just experiment but the evenings are starting to get cold! Winter is almost here in Missouri, USA.
Thanks for any/all help.
Arvin