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  1. Thread: Iguidance v4.0

    by ming
    Replies
    251
    Views
    70,968

    I've found full frame doesn't work with RR. the...

    I've found full frame doesn't work with RR. the screen goes back to normal mode with menu bar after a second or so.
  2. yeah, someone mentioned using a remote_on signal...

    yeah, someone mentioned using a remote_on signal to turn on his or her PC. the remote_on goes high when remote is clicked to unlock the doors.

    use both this and ACC for M1 ACC, need diodes on...
  3. Thread: 2nd Battery

    by ming
    Replies
    36
    Views
    7,977

    this is my $2 setup, fuses near car, pc batteries...

    this is my $2 setup, fuses near car, pc batteries and PSU not shown. the PC battery is disconnected from car battery when you turn car off (ACC off), and during engine cranking (some cars may not...
  4. Replies
    9
    Views
    1,964

    you may search for its spec and find something...

    you may search for its spec and find something else can match it.
  5. Thread: 2nd Battery

    by ming
    Replies
    36
    Views
    7,977

    I use a $2 40A relay and it works well. I don't...

    I use a $2 40A relay and it works well. I don't think the current would be anywhere close to 40A... the second battery also makes the computer survives cranking easily, as during cranking the main...
  6. Replies
    8
    Views
    1,419

    15A should be enough for most carputers. yes, a...

    15A should be enough for most carputers. yes, a 30A fuse would provide less protection if your computer and monitor always draw less than 15A.
  7. Thread: true stereo sound

    by ming
    Replies
    15
    Views
    1,889

    PC sound card outputs stereo, typically through...

    PC sound card outputs stereo, typically through 1/8" mini stereo jack. you need an adapter for mini-stereo to RCA such as this one...
  8. Replies
    42
    Views
    10,767

    MatrixPC, what inductors did you use?

    MatrixPC, what inductors did you use?
  9. with the resistor, the current won't even reach...

    with the resistor, the current won't even reach 1A, thus no need to have a 30 A diode...

    I just use a backup battery with a relay, no diode or resistor. don't know why people bother with them ;)
  10. Replies
    12
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    8,032

    if the carAwake signal is from the interior...

    if the carAwake signal is from the interior light, then it normally should be off isn't it?
  11. Replies
    3
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    799

    it's likely M2 problem. if it's not turning on,...

    it's likely M2 problem. if it's not turning on, pressing the computer power button would have no effect as the computer is not getting power.
  12. Thread: GPS outages

    by ming
    Replies
    9
    Views
    1,545

    the first link is for DGPS ground stations, only...

    the first link is for DGPS ground stations, only DGPS receivers near the down stations would get affected for DGPS function, GPS itself should still work.

    the second link I don't know. but a...
  13. Replies
    26
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    1,920

    it's connected when you plug the 20-pin connector...

    it's connected when you plug the 20-pin connector for motherboard.
  14. Poll: the other way around. RCA plug is also called...

    the other way around. RCA plug is also called phono because it was originally made for phonograph (record player) connections exclusively. the telephone connectors (1/4" or 1/8" mono plugs) are...
  15. Replies
    8
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    12,342

    using a switch directly shouldn't be a problem at...

    using a switch directly shouldn't be a problem at all for a computer PSU.
  16. Poll: phono normally means RCA connector, not 1/8". ...

    phono normally means RCA connector, not 1/8". maybe you can remove that 1/8" phono part... whether through 1/8" stereo jack or RCA/phono is less important...
  17. Thread: cap math?

    by ming
    Replies
    60
    Views
    4,933

    skin effect has nothing to do with voltage or...

    skin effect has nothing to do with voltage or current. it's only a function of frequency. people should not worry about skin effect at all for any analog audio application.
  18. Thread: cap math?

    by ming
    Replies
    60
    Views
    4,933

    for DC, skin effect is zero. the higher...

    for DC, skin effect is zero. the higher frequency the more severe it is, but typically only at several hundred kHz you need to worry about it. at 20kHz (typical upper limit for young people...
  19. Thread: Just curious

    by ming
    Replies
    8
    Views
    757

    having a ground loop means something is not...

    having a ground loop means something is not grounded well. ground loop isolator does not fix it... it just hides the problem. having 2 Ohms grounding resistance is way too high. even 0.2 Ohms is...
  20. Replies
    38
    Views
    3,624

    I just simply put a SLA battery in, connected to...

    I just simply put a SLA battery in, connected to main battery through a relay triggered by ACC. ACC drops down during cranking so main battery is disconnected and my computer has no problem running...
  21. Thread: 5v noise filter

    by ming
    Replies
    12
    Views
    2,033

    for engine noise, 90% or more chance is grounding...

    for engine noise, 90% or more chance is grounding issue. plus the 5V line from computer PSU should be very well filtered already.
  22. Thread: 5v noise filter

    by ming
    Replies
    12
    Views
    2,033

    I'm confused what's your setup, but I suggest you...

    I'm confused what's your setup, but I suggest you find out what's causing the alternater whine first before putting noise filter on the 5V line.
  23. Replies
    60
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    5,791

    the burnt FET is fairchild FDS6680A. there are...

    the burnt FET is fairchild FDS6680A. there are quite several of them on M2.
  24. Replies
    69
    Views
    9,427

    some links are broken, such as...

    some links are broken, such as http://store.mp3car.com/products/PowerSupplies/M2_ATX/M2-ATX-manual.pdf
  25. Replies
    7
    Views
    7,929

    yeah, the wire you got is not for car audio... it...

    yeah, the wire you got is not for car audio... it works, but just harder to route. you should be able to buy wire from any car audio store or online at places such as partsexpress.com. they sell by...
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