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  1. MP1

    My 120 Watts Power Inverter

    Did you use the correct ratio transformer? This would cause such a symptom. If it is ok, what is the frequency of the output? Is it also high? MP
  2. MP1

    Connecting An Audio Output to 20 Headphones...

    Hotwaterwizard, I see nothing wrong with your post. It looks like they have changed the subject without posting a new topic. Believe me, your efforts are not a waste. Others will appreciate it. others: Gold plated relay contacts? give me a break. Better for arcing? Go ahead and waste your...
  3. MP1

    Audio Signal Switch

    audioguru, I have never used the chip for line level. I was not talking about capacitors on the output or across the output. In fact, I was not talking about adding capacitors on the audio side at all. I was also not talking about theory of how to do this, but was speaking from many years of...
  4. MP1

    Audio Signal Switch

    shahriar, I use 4016 for switching audio with microprocessor such as you have described. Also, 4066 is a good switch, depending upon impedance needed. Study the data sheets for these two. Hope it is helpful. Many music effects use the 4016 for switching between different effects in a rack...
  5. MP1

    NEWB HERE!

    Halo69, if you want to learn, you will have to read the books. There are also tutorials on the web. MP
  6. MP1

    Demagnitize reception of radios

    quantum, I do not have such a circuit in my archives, but I would recommend a google.com search. I am sure something will come up from it. www.discovercircuits.com also has quite a large schematic library. MP
  7. MP1

    Want help in Voice & Data Multiplexing

    masterleous, Your computer port will send digital data only. Your sound card will send analog data to the speakers. Perhaps if you could post the circuit that you have found others will be able to help. MP
  8. MP1

    Switching power supply

    omiela, please post with a new subject. We would like to hear about your ideas, but only those who are interested in the switching power supply will read this thread. Feedback will be limited. MP
  9. MP1

    transformer

    http://www.electronics-lab.com/articles/transformers/ MP
  10. MP1

    Demagnitize reception of radios

    I would build an FM transmitter and tune it to the same station they are blasting me with..... ;D ;D MP
  11. MP1

    How to increase reactance in a coil of few turns?

    22AWG wire has a resistance of 17.9 ohms per 1,000 ft. MP
  12. MP1

    Problem with LEAD-ACID Battery

    I agree. it sounds as if the battery has gone bad prematurely. MP
  13. MP1

    DIO Protection

    Sandman, Limiting with zener diodes: MP
  14. MP1

    Inductor

    Here are some tools that will help: http://www.csgnetwork.com/spiralcoilinduccalc.html http://www.lalena.com/audio/calculator/inductor/ http://emcsun.ece.umr.edu/new-induct/ You should be able to find the value of your inductor with one of the above. MP
  15. MP1

    Help this newbie

    One way to do this if you will only use one switch at a time would be to trigger comparators with the switches, then feed this voltage into a A/D. Will you only use one switch at a time? If you want to get different combinations of the switches, then you will be better off using a...
  16. MP1

    Grounding circuit

    Exactly my point. You see the term "ground" used very loosely. I work quite a bit in the meteorological field and ground is earth ground. Otherwise, you are referring to a "common". MP
  17. MP1

    Problem with LEAD-ACID Battery

    Rhonn, another reason you might see battery acid in this place is if you are over charging the battery. If this is the case, the acid will boil and come out of the vents. MP
  18. MP1

    Free sample chips!

    siddharth, I am not sure if their policy sends samples to students. You might want to give yourself a business name and try again to see if there is a difference. Just a suggestion. MP
  19. MP1

    Mains current detection

    Excellent idea, ante! Looks simple, too. MP
  20. MP1

    Need cross for diode 1SS82

    Rhonn, the diode is not quite as critical in this setup as the capacitor. The diode function is secondary. Capacitor value is critical, though. This setup is used in conjunction with all of your PNP transistors. Since you asked: ;) When a reverse voltage is applied to a PN junction , the holes...
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