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  1. MP1

    PSP HDD

    This might help. HD and Flash card are pretty much the same in connection. This link has a schematic and some sample code to read the hard drive and/or flash card. http://www.mcselec.com/index.php?option=com_content&task=view&id=87&Itemid=57 MP
  2. MP1

    Project: Voltage tester for BT line

    Post a drawing of your probe. Sometimes we make the best mistakes on something that seems simple. Are you measuring 50 VDC with this probe? MP
  3. MP1

    3v to 12v pc hdd data signal

    You can use an opto isolator or Solid State Relay. The 3 volts could run the LED portion which would turn on the relay or transistor section that is connected to the 12 Volt side. If you have the parts in you bin, you could construct something similar from a photo transistor and LED, etc...
  4. MP1

    Capacitor Voltage

    In what cases do you see this to be a problem? MP
  5. MP1

    5ohm 20watt resistor

    http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=3031&Row=380100&Site=US MP
  6. MP1

    HDD+WEBCAM+MIC >> MOVIECAM ??

    no. You will need more than that. MP
  7. MP1

    PSP HDD

    Looks like your dad will need to teach you how to program a microcontroller before you can get started. MP
  8. MP1

    Wattage lowering

  9. MP1

    Voltage level shifting

    You don't need 4 op-amps to achieve this. 2 will do it fine. You just need a circuit that will give you a zero and span calibration (this is the 1st op-amp). The zero cal will move the voltage window up or down. The span cal will widen or narrow the window, or voltage swing. You can add a span...
  10. MP1

    Introduction

    Hi CPW, Welcome to the forum! I expect we will see you often in the micro area. Enjoy! MP
  11. MP1

    Resistance and Resistivity

    Diarmuid, From your post, it sounds as if you are looking for a resistive voltage divider. Here is a nice illustrated link that will explain how to do this. http://physics.mtsu.edu/~phys2020/Lectures/L12-L16/L13/Volt_Divider/volt_divider.html Hope this helps. MP
  12. MP1

    caps

    It is rare for a capacitor to short. They usually "open". Are you sure the problem is a cap? The best way to find out where the sound stops in an amp is to introduce a tone into the input of the amplifier and follow the signal through the circuit until it stops. This could be done with a tone...
  13. MP1

    Led display digital Voltmeter

    How did you solve your problem? Cap on the signal input? Cap on the voltage buss? Describe your fix. Others might be having the same problem. MP
  14. MP1

    datasheet

    You might try the Datasheet/Parts request area of this site... MP
  15. MP1

    schematic to pcb software?

    Instead of trying to download Eagle through this site, put the following address in your browser: http://www.cadsoft.de/cgi-bin/download.pl?page=/home/cadsoft/html_public/download.htm.en&dir=eagle/program/4.1 It will allow you to download directly from the Cadsoft server. Re-direct is very...
  16. MP1

    any guitar amplifier pcb out there????

    What are you looking for? There are guitar amps all over the internet, including the projects section of this site. For a pcb, you can make your own with one of the many free pc board programs. Post the specs you need. MP
  17. MP1

    Electronic Stethoscope

    Mostly what you are inhaling is the burning flux from the core of the solder. Here is a link to a MSDS safety data sheet. http://www.ee.ryerson.ca/~jkoch/MSDS_Sheets/msds%20r244l%20sn63pb37%20us%20(03oct03).pdf You should look for the specific MSDS for your solder product. Since you are a...
  18. MP1

    Voltage level shifting

    It sounds like you are connecting a sensor to the A2D on a micro. If this is the case, you do not need to waste your time converting the voltage. Just use what you have. Adjust the reference voltage on the micro if you need better resolution. Also, if this is not your application, I think there...
  19. MP1

    VHF AMPLIFIER (PLZ ANSWER)

    sssaaa, Post a link to the project. MP
  20. MP1

    LED display digital voltmeter

    It is reply #22 of the original thread: http://www.electronics-lab.com/forum/index.php?topic=5629.210 Please put an effort to read the posts when you have a question. MP
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