Timing circuit help needed

[Ivan Vegvary]

Installed car seat warmers into SWMBO's car. Key must be on for them to function. Would like to rewire in a way that I could preheat the seats prior to her use. 5 to 10 minutes would be sufficient. Ideally: Push remote control button from inside house (15 feet from car), seats circuit turns on for circa 5-10 minutes. If ignition is not started after 10 minutes, seats turn off. If ignitions is started, seats remain energized.

Resources: Remote control door fob, Arduino Uno, very small knowledge of digital electronics.

Suggestions greatly appreciated.

Ivan Vegvary

 

[P E Schoen]

"Ivan Vegvary" wrote in message
news:26f95d51-2ceb-4554-9345-8c2fe5c2511d@googlegroups.com...

Installed car seat warmers into SWMBO's car. Key must be on for them to
function. Would like to rewire in a way that I could preheat the seats
prior to her use. 5 to 10 minutes would be sufficient. Ideally: Push
remote control button from inside house (15 feet from car), seats circuit
turns on for circa 5-10 minutes. If ignition is not started after 10
minutes, seats turn off. If ignitions is started, seats remain energized.

Resources: Remote control door fob, Arduino Uno, very small knowledge of
digital electronics.

Suggestions greatly appreciated.

You could use a time delay relay with an interval function, such as:
http://www.newark.com/pdfs/datasheets/SE_Relays/TDRSOXP-12V.pdf
but it's about $66:
http://www.newark.com/magnecraft/tdrsoxp-12v/time-delay-relay-dpdt-10h-12vac/dp/10M6239

If you can get the Arduino to respond to the remote door fob, it could
easily turn on a relay for the time needed. You could use diode steering
logic to allow the seats to be warmed either from the Arduino (which would
be directly off the battery), or the ignition. You could also add a
temperature sensor to control the heat, and a battery voltage sensor that
would keep the heating turned off if battery voltage dropped below a safe
level.

Paul

 

[Ivan Vegvary]

On Thursday, January 3, 2013 7:16:07 PM UTC-8, Ivan Vegvary wrote:

Installed car seat warmers into SWMBO's car. Key must be on for them to function. Would like to rewire in a way that I could preheat the seats prior to her use. 5 to 10 minutes would be sufficient. Ideally: Push remote control button from inside house (15 feet from car), seats circuit turns on for circa 5-10 minutes. If ignition is not started after 10 minutes, seats turn off. If ignitions is started, seats remain energized.



Resources: Remote control door fob, Arduino Uno, very small knowledge of digital electronics.



Suggestions greatly appreciated.



Ivan Vegvary

 

[Ivan Vegvary]

On Thursday, January 3, 2013 11:18:38 PM UTC-8, P E Schoen wrote:

"Ivan Vegvary" wrote in message

news:26f95d51-2ceb-4554-9345-8c2fe5c2511d@googlegroups.com...



Installed car seat warmers into SWMBO's car. Key must be on for them to

function. Would like to rewire in a way that I could preheat the seats

prior to her use. 5 to 10 minutes would be sufficient. Ideally: Push

remote control button from inside house (15 feet from car), seats circuit

turns on for circa 5-10 minutes. If ignition is not started after 10

minutes, seats turn off. If ignitions is started, seats remain energized.



Resources: Remote control door fob, Arduino Uno, very small knowledge of

digital electronics.



Suggestions greatly appreciated.



You could use a time delay relay with an interval function, such as:

http://www.newark.com/pdfs/datasheets/SE_Relays/TDRSOXP-12V.pdf

but it's about $66:

http://www.newark.com/magnecraft/tdrsoxp-12v/time-delay-relay-dpdt-10h-12vac/dp/10M6239



If you can get the Arduino to respond to the remote door fob, it could

easily turn on a relay for the time needed. You could use diode steering

logic to allow the seats to be warmed either from the Arduino (which would

be directly off the battery), or the ignition. You could also add a

temperature sensor to control the heat, and a battery voltage sensor that

would keep the heating turned off if battery voltage dropped below a safe

level.



Paul
Paul, thank you so much for your reply. It has given me ideas and direction. Thanks again.

Ivan Vegvary