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  1. MP1

    defective project

    Explained this before....but here goes again...... No one can control what gets posted to the web. But most problems in projects are minor. Lines end up in the wrong places or some values are wrong. If you build a project and it does not work, report it to the moderator. If someone else built...
  2. MP1

    Lowpass filter for subwoofer

    MP
  3. MP1

    Lowpass filter for subwoofer

    frt, what help do you need? In looking at the thread linked to the project, it seems to work ok for those who posted. There is also an email link that will connect you directly with the author of the project if you need specific help. MP
  4. MP1

    Unipolar Stepper Motor Controller using UCN5804

    You can purchase them at: Futurlec electronics: http://www.futurlec.com/Others/UCN5804Bpr.shtml American Micro Semi: http://store.americanmicrosemiconductor.com/ucn5804b.html?gclid=CKSGlr7VzoMCFShCDgod8FAG8A Farnell in One...
  5. MP1

    Computer Speaker Switch

    Take a look at CMOS switching ICs, such as the 4066 and similar. MP
  6. MP1

    0-30 Vdc Stabilized Power Supply

    You can use a capacitive divider at the AC. Capacitive dividers can be used with AC input signals.  A DC input voltage would not pass through the capacitors, so you would have to use this type of divider where there is still an AC component to the circuit. The formula for determining the AC...
  7. MP1

    How To calculate the feedback resistors in an OpAmp Amplifier?

    You are changing the input resistance and thus changing the input impedance. The input resistor could also be used as part of the input filtering such as a resistor/capacitor filter. The value would need to be correct for the cut point. In all cases, the input resistor is determining the current...
  8. MP1

    0-30 Vdc Stabilized Power Supply

    Some who have made the original circuit also had success. You seem to be blinded to this because of the work you have done to make it better. You also don't seem to understand what I mean by rumor and exaggeration. I have spoken with mixos on this subject within the past week. It is as I have...
  9. MP1

    0-30 Vdc Stabilized Power Supply

    Actually, to keep the rumors down, I will interject here: Mixos has mentioned to me recently that he put the project on hold due to a time constraint.  He has been doing other things and has not been able to put attention to it. Please do not exaggerate, audioguru. I am not aware that his power...
  10. MP1

    0-30 Vdc Stabilized Power Supply

    Thanks for the feedback neo, It is very much appreciated. MP
  11. MP1

    0-30 Vdc Stabilized Power Supply

    hanaship, Please feel free to send your drawing to me at [email protected] or post it to this site if you would like. Please also feel free to post your ideas without fear of ridicule. I have built a pretty good reputation for removing posts which ridicule others... Audioguru is not the owner...
  12. MP1

    about mixer

    Ana, The LM386 is a nice little power amp chip. I have attached the data sheet for this chip. Perhaps it will give you more insight. You can also get more amplification out of this chip if needed. See the data sheet. MP LM386.pdf
  13. MP1

    220V to 110V

    felto, What voltage do you measure at the secondary side of the transformer? It is most likely 1/2 of what you had originally. Another thing to look at is the motor inside this unit. It also should have some markings to tell you what it needs. MP
  14. MP1

    Google before posting

    ...what kind of a forum tells people to go somewhere else? Not a helpful one like ours. Post your questions! You do not have to google. MP
  15. MP1

    hacking a solid state relay

    Do you really need 60A? What are you using them for? I use the OPTO22 type for most projects. These are pretty stout but not very expensive. http://www.opto22.com/documents/0859_Solid_State_Relays_data_sheet.pdf Good luck on your parts search. MP
  16. MP1

    MOVED: veronica fm transmitter

    This area is only for projects in our projects section. This topic has been moved to Electronic Projects Design/Ideas. http://www.electronics-lab.com/forum/index.php?topic=5833.0
  17. MP1

    Printer cable LCD Display

    The display in your link uses the KS0070H controller. This project needs a display which uses the Hitachi HD44780 controller. MP
  18. MP1

    MOVED: re-wiring to use batteries???

    Posted in wrong forum. This topic has been moved to Electronic Projects Design/Ideas. http://www.electronics-lab.com/forum/index.php?topic=5868.0
  19. MP1

    0-30 Vdc Stabilized Power Supply

    Why not just simulate the report...    ;D MP
  20. MP1

    0-30 Vdc Stabilized Power Supply

    ......always more than zero as long as you have potential...... MP
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