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  1. MP1

    Supa Dupa Basic Timed Latched Relay

    Laet, I have attached a small tutorial on using transistors as switches. It might be what you are searching for... MP BiPolar_Transistors_as_Switch.pdf
  2. MP1

    Free sample chips!

    You might contact Don at www.dontronics.com to see how he gets them. MP
  3. MP1

    inverter oscillator

    The word unstable was my description. It states that if the capacitance becomes too small, it will fail to oscillate. You have misread when you state it can only fail when the oscillator is disconnected. ...but here is the section from page 3. Everyone can make their own assumption of...
  4. MP1

    Laser Cutter

    Here are some links: www.commlinx.com and quite few here http://www.discovercircuits.com/L/laser.htm MP
  5. MP1

    Laser Cutter

    Yes, it is possible. There are cutters on the manufacturing market that use this technology. There are also PCB drill stations which use laser for the holes. There are many on this site that would be very interested in such a project. Please feel free to share it with the group as you are...
  6. MP1

    What is this suppose to do?

    I just used it...it is much better than the old search. Also, you do not have to leave the forum to go to a search area. It pops up in a new window. Very nice to use. Thanks Mixos. MP
  7. MP1

    inverter oscillator

    Kevin (and others), Here I have attached the Application Note from Fairchild Semi which tells why the CMOS two inverter oscillator is unstable and how to build a better one. Please read it. MP AN-118.pdf
  8. MP1

    inverter oscillator

    Kevin, a two gate oscillator is unstable. A three gate oscillator is more stable and will give you a better result. I have posted an application note about this in a thread about a radar detector project. You can find the link with a search. It is an interesting article regarding this subject...
  9. MP1

    Design of DAC

    yc_2: Here is a site that might help. http://www.filter-solutions.com/switched.html MP
  10. MP1

    what is silk screen??

    gsmaster, that looks really nice. I will have to give it a try on my next run. How well does the legend stay on the board? Does it come off with alcohol when cleaning off flux? Do you have to spray anything on it to seal it? MP
  11. MP1

    extrosonic anybody?!?

  12. MP1

    Newbie Here

    Chaos, look at the top of the page. There is a link to the projects section of this site. This would be a good place to start. Lots of schematics. MP
  13. MP1

    extrosonic anybody?!?

    Daniel, Sounds like this is a US product. The US manufacturers normally use a spec like 110 - 120 VAC. In the US, it is standard to use 240 VAC, 200 AMP service to the house. The 240 VAC at the power box consists of 2 lines with 120 VAC each and a return. In your country, the only difference is...
  14. MP1

    HP Spectrum analyzer

    Is there any chance you would post the low dollar amount that you would accept? MP
  15. MP1

    OUTPUT IMPEDANCE

    Shiva, here is also an article from the web: http://www.mitedu.freeserve.co.uk/Theory/inzoz.htm MP
  16. MP1

    what is silk screen??

    Many of the older PC Board shops used silk screen to make the circuit pattern on the copper as well. I tried this, but it takes a lot of practice and I never liked the results as compared to the photography method. It is also very messy. You have a lot of clean up after each board you print...
  17. MP1

    0-30 Vdc Stabilized Power Supply

    Capricious, The owner of the list has built this supply. He has not noted anything dnagerous. In fact, he started a thread on how to make it better and capable of more current. I suggest you contact 'mixos' directly through e-mail or with the private message to ask him about his experience. All...
  18. MP1

    actually a quad amp....

    ...from the data sheets: MP
  19. MP1

    Switching power supply

    vainaja, I agree with the others. It is a nice looking layout. Perhaps you could leave it as it is and later make a new REV? MP
  20. MP1

    Voltage Matching

    Hi Jerry, can you tell us anything about the existing circuit that is now running the fan? MP
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