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kluivert
Joined: 19 Sep 2007
Posts: 22
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 22 Jun 2008 17:23 car window closer schematic |
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I am making GSM car alarm system, one of the features is controlling power window of the car from the microcontroller, how this can be done ? the microcontroller should control the switch panel of the windows or the dc motor itself ? and how it can be done using uC atmega 8515
thanx in advance
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FvM
Joined: 22 Jan 2008
Posts: 5160
Helped: 767
Location: Bochum, Germany
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22 Jun 2008 17:51 car window closer circuit schematic -patent |
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| Modern cars have electronic door units, probably utilizing serial busses for communication.
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kluivert
Joined: 19 Sep 2007
Posts: 22
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22 Jun 2008 17:56 window lift circuit |
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No it's not a modern car  so it's confusing a bit
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FvM
Joined: 22 Jan 2008
Posts: 5160
Helped: 767
Location: Bochum, Germany
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22 Jun 2008 20:36 lift dc motor calculations |
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| O.K., if the switch panel is directly controlling the motor, then you need power peripherals with your µP. You have to check the particular requirements of the motor circuit, normally some kind of H-bridge is necessary for bidirectional operation-
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TekUT
Joined: 17 Jun 2008
Posts: 413
Helped: 23
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23 Jun 2008 8:16 window lift control using relays |
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Take also care how to stop the motor, may be there is some sensor concerning the motor current absorption or some other way.
Cheers
F.F. a.k.a. Powermos
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amol_shah
Joined: 21 Apr 2008
Posts: 117
Helped: 14
Location: Nasik, Mumbai
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24 Jun 2008 19:06 Re: Car window lift dc motor |
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use relays to operate the dc motors simple cube relay will be sufficient, i suggest do not go for H- bridge as the current requires by these motors is high so you will require heat sinks thus increasing the cost & size of the unit.
Use a very small value resistor in series with the dc motor, monitor the voltage across this resistor so when the window is fully closed or opened the current required by the motor will be very high thus increasing the voltage across this resistor. So even if the window is stuck somewhere in between the motor will be automatically switched off.
check this link for relay interfacing circuit
http://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/Relay-Interfacing.html
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fratello
Joined: 22 Jun 2008
Posts: 9
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24 Jun 2008 21:03 Re: Car window lift dc motor |
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...can You, Sir, indicate HOW making this ? I am verry interested about a such schematic, since I want to do this to my own car (Logan !!! - Mahindra, I guess ?!). Well, I want to build some 'interface' witch, due one impulse (positive !) to lift my windows car...with peak detector, so do not damaging the motors of windows. Can help ? I build something with transistor...but with microcontrollers it is much interesting and accurate, don't ? Thanks in advance for any replay ! All the best !
I attach the schematic of module that I use now...One positive impulse, the relay work for about 25 sec, the peak current from DC motor will reset the module...How doing this with a cheap microcontroller ?
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amol_shah
Joined: 21 Apr 2008
Posts: 117
Helped: 14
Location: Nasik, Mumbai
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27 Jun 2008 14:40 Re: Car window lift dc motor |
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| you will require two relays for each motor, so in all 8 relays, you can use atmel's 89c2051 micro controller as for the f/b ckt you can use transistor/opamp based ckt to monitor the current, the code will be simple you will turn ON one motor at a time & check the peak current once that is reached switch off the relay & turn on second motor & so on
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fratello
Joined: 22 Jun 2008
Posts: 9
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27 Jun 2008 14:49 Re: Car window lift dc motor |
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| Thanks for reply ! No, I wish one schematic just for two relay, one for each front window ! When I close the car by remote control, the UCH give me one short positive impulse for about 2 seconds ; this I want to use to lift the front doors windows, for not remaining open after night...I think the schematic in this case is quiet simple, but I am zero about this subject (uC). I You can help me, I will be verry grateful !
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amol_shah
Joined: 21 Apr 2008
Posts: 117
Helped: 14
Location: Nasik, Mumbai
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27 Jun 2008 18:04 Re: Car window lift dc motor |
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| only the schematic wont help you will also require the code for microcontroller
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fratello
Joined: 22 Jun 2008
Posts: 9
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06 Jul 2008 18:25 Re: Car window lift dc motor |
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| Thanks for nothing...
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Google
AdSense
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06 Jul 2008 18:25 Ads |
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blueroomelectronics
Joined: 17 Sep 2006
Posts: 1681
Helped: 99
Location: Toronto, Canada
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06 Jul 2008 19:09 Re: Car window lift dc motor |
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| fratello wrote: |
| Thanks for nothing... |
Play nice
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fratello
Joined: 22 Jun 2008
Posts: 9
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06 Jul 2008 20:41 Re: Car window lift dc motor |
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| If somebody come to me and ask for one injection, I made it....because I know to do this...and I don't send him to medical school...This is the ideea...All the best to everyone, everywhere...
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