Welcome to the MP3Car.com forums.
You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. Registering will also remove advertisements. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact contact us.
|
01-12-2004, 02:53 AM
|
#16
|
|
Constant Bitrate
Join Date: Jan 2004
Vehicle: 1992 Mazda 323 Sedan
Posts: 117
|
Well, I also wired the DTR directly to my AMP, works ok!  Da_Teach; Maybe it's just xp that screws it up? |
|
|
|
01-12-2004, 10:52 AM
|
#17
|
|
Constant Bitrate
Join Date: Jan 2004
Location: Kentucky
Vehicle: 1987 Nissan Pulsar NX SE
Posts: 136
|
An easy solution would be useing a simple switching transistor... I am thinking something such as a 2N2222 NPN General Purpose Tran. would work..
It can handel around 60v on the base (DTR output) which is well over enough and can put out as much as 40v on the emitter side (To amplifier)... The only possible problem I see could be it can only handel up to 800mA of current at the collector (12v input to turn on amp)
I am not sure if that would be enough to turn on the amp or if the transistor could even handel being hooked into a car electrical system? Anyone have any ideas on this... I can test is later if need be...
Simple diagram of this application if it would work is
*note* the transistor is quiet small (excluding the sire leads the actual chip is smaller than your pinkie nail) the size on picture is just for referance...*
**Edit**
As this is a simple cheap way of doing this I would suggest the use of an opto-isolator in this case for added protection of the PC... If this would work and someone would confirm it I will try it in my Van (normal system) just to test the therory...
Last edited by Twizted : 03-02-2004 at 01:57 PM.
|
|
|
|
|
01-12-2004, 12:16 PM
|
#18
|
|
Newbie
Join Date: Oct 2003
Posts: 38
|
Well the problem I ran into was that the amp turned off half-way during the journey... I first thought I blew up my serial port, but I think its because my serial port doesnt output enough voltage ... It starts off at 10v but after a while drops to 7v, which probably made my amp shut down...
|
|
|
|
|
01-12-2004, 12:36 PM
|
#19
|
|
Constant Bitrate
Join Date: Jan 2004
Location: Kentucky
Vehicle: 1987 Nissan Pulsar NX SE
Posts: 136
|
Probably so... The base on the Transistor above will activate at very low voltage all the way up to 60v.... I have used them on small projects that only output 5v and less... and up to 12v....
|
|
|
|
|
03-02-2004, 12:10 PM
|
#20
|
|
Constant Bitrate
Join Date: Nov 2003
Location: S.F. Bay Area
Vehicle: 02 Accord EX-V6
Posts: 200
|
Quote:
Simple diagram of this application if it would work is
The picture is gone... Any chance you could repost the schem? Thanks! |
|
|
|
|
03-02-2004, 01:54 PM
|
#21
|
|
Constant Bitrate
Join Date: Jan 2004
Location: Kentucky
Vehicle: 1987 Nissan Pulsar NX SE
Posts: 136
|
sorry bout that... My webserver host decided to delete my entire account back in the first part of Feb. and I didnt think about this.. This time I uploaded it..  Here to stay unless the admin kills it  |
|
|
|
|
03-02-2004, 02:29 PM
|
#22
|
|
FLAC
Join Date: Jul 2003
Location: San Antonio, TX. USA
Vehicle: 2000 BMW M Roadster
Posts: 1,375
|
If im reading this correctly, you are saying you can attach the post marked collector directly to a 12 volt source? is that right? Then attach the base post to the number 4 wire from your serial port and attach the emitter post to the relay switch on the amp. Once the package is installed in Winxp, and the services start up, it should turn on the amp? Did I get that correct? I ask because I have that thump in my system as well and would really like to get rid of it. Are the posts on the transistor marked which is which or is there a color code involved?
Thanks,
peter
__________________
Stop Buying New Music CD's.
Hit The RIAA where it lives.
Indash Motorized 7", Epia Nehimiah, 512 MB, 80 GB, DVD, Wireless G, XP Pro, XM PCR, Kenwwod 5 Channel 1200 Watt Amp.
|
|
|
|
|
03-02-2004, 02:35 PM
|
#23
|
|
Constant Bitrate
Join Date: Jan 2004
Location: Kentucky
Vehicle: 1987 Nissan Pulsar NX SE
Posts: 136
|
I listed it as a 2N2222 commonly available at just about any RadioShack... But!... I am gonna actually work on something a little more power tollerant.. You can try this for very little $$... should actually be less than a buck... but it would be alot better if you had a opto-isolator between the Transistor and Carputer... and also I am gonna look for a cheap source for a more suitable Transistor.. I still have not gotten to test this myself as I have not had the time..
I will soon if no one else does since i have a few hundred General purpose 2222 transistors....
but you pretty much hit the nail on the head...
**EDIT** Thinking about it.. It would be more practical and safer for the equipment to use the transistor to trip a relay rated at around 1amp.. although the above should work fine I think I might go with a relay design...
I will make a diagram unless someone beats me to it later tonight when I get home..
Last edited by Twizted : 03-02-2004 at 02:37 PM.
|
|
|
|
|
03-15-2004, 10:00 AM
|
#24
|
|
FLAC
Join Date: Jul 2003
Location: San Antonio, TX. USA
Vehicle: 2000 BMW M Roadster
Posts: 1,375
|
Hi!
what happened with this? Were you able to get rid of the "thumps"? I'm gonna go get the parts I need this week and give it a try. I just needed to build a workbench to work on and got that done this weekend.
Peter
Quote: Originally Posted by Twizted
I listed it as a 2N2222 commonly available at just about any RadioShack... But!... I am gonna actually work on something a little more power tollerant.. You can try this for very little $$... should actually be less than a buck... but it would be alot better if you had a opto-isolator between the Transistor and Carputer... and also I am gonna look for a cheap source for a more suitable Transistor.. I still have not gotten to test this myself as I have not had the time..
I will soon if no one else does since i have a few hundred General purpose 2222 transistors....
but you pretty much hit the nail on the head...
**EDIT** Thinking about it.. It would be more practical and safer for the equipment to use the transistor to trip a relay rated at around 1amp.. although the above should work fine I think I might go with a relay design...
I will make a diagram unless someone beats me to it later tonight when I get home..
__________________
Stop Buying New Music CD's.
Hit The RIAA where it lives.
Indash Motorized 7", Epia Nehimiah, 512 MB, 80 GB, DVD, Wireless G, XP Pro, XM PCR, Kenwwod 5 Channel 1200 Watt Amp.
|
|
|
|
|
03-15-2004, 01:59 PM
|
#25
|
|
Constant Bitrate
Join Date: Jan 2004
Vehicle: 1992 Mazda 323 Sedan
Posts: 117
|
Quote: Originally Posted by chut
Hi!
what happened with this? Were you able to get rid of the "thumps"? I'm gonna go get the parts I need this week and give it a try. I just needed to build a workbench to work on and got that done this weekend.
Peter
I connected the serial port directly to the amp's remote, and it still works very good... :-) No "thumps" at all.. |
|
|
|
|
03-15-2004, 02:15 PM
|
#26
|
|
FLAC
Join Date: Jul 2003
Location: San Antonio, TX. USA
Vehicle: 2000 BMW M Roadster
Posts: 1,375
|
Do you have a transisitor in there somewhere or are you connecting directly between your serial port and the remote turn on for the amps?
Quote: Originally Posted by burnout.no
I connected the serial port directly to the amp's remote, and it still works very good... :-) No "thumps" at all..
__________________
Stop Buying New Music CD's.
Hit The RIAA where it lives.
Indash Motorized 7", Epia Nehimiah, 512 MB, 80 GB, DVD, Wireless G, XP Pro, XM PCR, Kenwwod 5 Channel 1200 Watt Amp.
|
|
|
|
|
03-16-2004, 02:10 AM
|
#27
|
|
Constant Bitrate
Join Date: Jan 2004
Vehicle: 1992 Mazda 323 Sedan
Posts: 117
|
No transistor, directly connected.. Atleast, it works for me! |
|
|
|
|
03-16-2004, 04:49 AM
|
#28
|
|
FLAC
Join Date: Jul 2003
Location: San Antonio, TX. USA
Vehicle: 2000 BMW M Roadster
Posts: 1,375
|
That's good to know, I finally mounted my pc in the trunk last night. I'll be giving this serial rig a try this weekend.
Take Care,
Peter
Quote: Originally Posted by burnout.no
No transistor, directly connected.. Atleast, it works for me!
__________________
Stop Buying New Music CD's.
Hit The RIAA where it lives.
Indash Motorized 7", Epia Nehimiah, 512 MB, 80 GB, DVD, Wireless G, XP Pro, XM PCR, Kenwwod 5 Channel 1200 Watt Amp.
|
|
|
|
|
03-16-2004, 05:58 AM
|
#29
|
|
Constant Bitrate
Join Date: Jan 2004
Vehicle: 1992 Mazda 323 Sedan
Posts: 117
|
Yes, go ahead and try it!
Good luck! |
|
|
|
|
03-16-2004, 06:18 AM
|
#30
|
|
Newbie
Join Date: Feb 2004
Posts: 32
|
Quote: Originally Posted by Da_Teach
After a bit of testing, I found out that directly wiring the DTR to the AMP works, but sometimes fails... So I'll have to put 'something' between the AMP and the serial port... So give easy idea's
How about :
regards
Jim
[Edit]
Totally missed the 2nd page of the post , (oops) anyway just using a transistor isn't really going to provide much protection to either the transistor or the serial port, the above schematic is better.
Last edited by jim22 : 03-16-2004 at 06:22 AM.
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -5. The time now is 02:53 AM.
|
|
