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  1. dorke

    How do I repair my monitor?

    Don't think it is worth replacing a board, it would be almost the price of a new monitor and no warranty... Do you get a front panel LED light on it, what color? The board you should remove and inspect is the one shown on the pic below (power supply), take a good photo of it's CS.
  2. dorke

    Help! Repairing water damaged PCB from Massage chair.

    Time to check the AC motor. I think there is a good chance to have it working after the repairs we did on it so far. 1. We should connect the main and controller boards with CN28. 2. On the main board connect CN1,CN2. 3. On the control board connect CN35 and MgDetect (the opto circuits). 4...
  3. dorke

    Building AEON overdrive pedal from mammoth electronics, need help...

    You should connect it the way it is shown in the pic . It will effect the min-max rotation direction of the pot. If you get it "reverse" simply swap the left and right wires.
  4. dorke

    PicoScope: Any users?

    I'm not a Pico user. Does the Pico get voltage from the wall-wart PS?(no led on)
  5. dorke

    PicoScope: Any users?

    Q3: Look here at the user manual. you need to set up the scope as per 1.1 in the doc for it to work with the 25pin parallel port. * Is the wall wart functional? * It is possible that the Pico software got corrupted,you may try re-installing it. * Have you opened the Pico for damage...
  6. dorke

    Help optimizing byte compare algorithm

    Yes they do perform the same (probably.A drill for you: find out when they may not work). But all 4 should be replaced with a single line! and the use of a "goto" command is bad programming. Something every beginner learns in "school" not to use! EDIT: I just looked at the PIC instruction...
  7. dorke

    Help optimizing byte compare algorithm

    jnz=Jump if not zero jz= Jump if zero.
  8. dorke

    Long duration timers - Notes for beginners

    Let me add here about the "progress made regarding the good old 555" There is the ICM755 CMOS version which is far better in any aspects including long duration timing signals. It is available from several vendors like: Intersil NXP Maxim The best of the bunch (at least on "paper" should be...
  9. dorke

    Building charger cable help

    Let's start with telling us what kind of equipment will it charge ?
  10. dorke

    Finding Books About Maya Civilization

    There are hundreds of books about Maya Civilization here
  11. dorke

    Help optimizing byte compare algorithm

    I haven't written a single line in PIC assembly ever. But what I see is more than "clunky" 1.You use the "goto" no-no command. 2.Inc and then dec is not needed. Here is a "generic" code(translate it to pic) note: If what you need is "Loop if equal" replace JNZ with JZ.
  12. dorke

    Help! Repairing water damaged PCB from Massage chair.

    We can go on testing without the IC. Please note on the pic the values of the resistors marked, and check they are the correct values. Just to be clear,Did you replace the ones with "green arrows" to 330 ohm? What is written on the IC in the 2nd pic ?
  13. dorke

    Multiple Miniature speaker project

    That isn't "miniature"... Anyways, How loud do you need them to be? That is defined in Watts. It will determine the amplifier required and the matching loudspeaker for it. In general, You can get very small speakers like those found in PCs,Laptops,Cellphones etc.
  14. dorke

    Help! Repairing water damaged PCB from Massage chair.

    That is very good news.:) 1. Time to connect the motors to CN13,CN14 and verify they are working(no IC ,same as you did in #246). The only thing to watch for is: Working with no functional IC ,no limit switch has any effect. So,take care not to drive the motors beyond the limits, if there are...
  15. dorke

    Building AEON overdrive pedal from mammoth electronics, need help...

    Well, Here is a fully functional assembled(not a kit) Overdrive Guitar Effect Pedal for under 18US$ including shipment. In a kit form they would sell it for about 10$...;) In the future, learn to take advantage of the Chinese cheap stuff.
  16. dorke

    Multiple Miniature speaker project

    1.You will need a small audio amplifier, since an MP3 player can't drive a speaker directly. 2. You need to define "miniature".
  17. dorke

    Searching an audio jack board replacement...

    Yes, but "Seat" must have a service center, they should help you.
  18. dorke

    How to wire a contactor

    Well A1-A2 are activated by 230Vac(see photo). You need Live and Neutral for that. But, Let me say this: With the knowledge you have you definitely shouldn't handle this,it can kill you!!! Get an authorized electrician to do the job for you!
  19. dorke

    Searching an audio jack board replacement...

    Doesn't look like a "standard connection". Best place to look for it is the manufacture of that specific unit.
  20. dorke

    260 Mulitmeter

    Look at the Pic below: The unique paths for the Rx1 are the 3 switch contact positions number 10 (marked red) and a single wire (marked green). Check them for discontinuity.
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