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  1. Omni

    WATER LEVEL MONITOR FOR PUMPS

    The DC source (battery) is a simple test to determine if rapidly switching your CMOS logic will operate properly without a false trigger. Once the above is determined you will know if the DC power supply you are using is the culprit. Arc flash across a relay is somewhat common because of the...
  2. Omni

    555 LED flasher circuit?

    Vary 100K trimpot to adjust speed of flash etc...
  3. Omni

    WATER LEVEL MONITOR FOR PUMPS

    Hi Keron, Practically, all IC circuits draw a very small amount of currrent, the latter can cause problems since a power supply when turned off will slowly discharge since current consumption of your circuit is not enough to pull it to ground fast enough. When you rapidly turn your power...
  4. Omni

    WATER LEVEL MONITOR FOR PUMPS

    Hi Keron, Actually, for the use you specified your design would be more suited. The type i mentioned is for a particular purpose. I used a float switch (waterproof) along with a relay, 555, 2N2222A and a small assortment of passive components. Once the water level in the sump (tank) enabled...
  5. Omni

    WATER LEVEL MONITOR FOR PUMPS

    Actually, the circuit should have provision for both AC and DC operation. I am not sure as to the use your pump is designed for... Example: Take for instance the typical basement sump that is used when a heavy downpour occurs. Generally, a home will have a perimeter area drain around the...
  6. Omni

    capacitor conversion chart

    http://www.justradios.com/uFnFpF.html Ditto  ;)
  7. Omni

    Professional Dead End?

    Become a doctor, the World is always full of sick people... Additionally, you do not have to be a surgeon, just a simple ear - nose & throat doctor! Plus, once you have graduated join a few in a group building, you can pick the days you like to work (3 days a week). A simple basic doctor...
  8. Omni

    12VDC @ 100ft from source

    Obviously, you have enough voltage at the base (24V) and the length to the LEDs (100') max is well within the tolerance of your supply voltage. Consider using an adequate guage wire (16AWG) and place a small regulator circuit at each interval (length). Using a regulator at each node 50', 75'...
  9. Omni

    Batteries In A Series

    I am not sure as to the overall current demand of the project but you can design a small regulator circuit using a few components to perform a precise voltage. The 1N4730 is a 3.9V Zener, i provided a link below to calculate the required current limiter resistor. Sadly, when powering a project...
  10. Omni

    Printing negatives from Eagle.

    MP, Actually, the process you described has been around a long time. Although, the concept of photo sensitive copper clad boards will make the job much easier. I remember having to use a resist/developer in a darkroom! The method you described will allow much less overall error since it does...
  11. Omni

    request PCb' standard!

    Additionally, be careful when placing a pad within a large ground plane. Suggestion: Trying to solder a component in the middle of a large ground plane can be difficult.
  12. Omni

    Printing negatives from Eagle.

    MP, What manufacturer/model number laser printer are you using to transfer your artwork/file to Press n Peel? Techiks has stated Hp is a good choice but the latter source did not mention any particular model number etc... Although, most laser printers use a similar method the fusing can be very...
  13. Omni

    Why is so hard to mimic the Knight Rider scanner Effect?

    Obviously, you did not take the time to read the instructions concerning the 3055H. Here it is again: http://www.eccolink.com/ProductPages/ShowFile.asp?Part=3055H&Type=II Scroll to page four, the variety of programming methods can perform a similar concept as the knight rider. Remember...
  14. Omni

    Led display digital voltmeter kit?

    Hi MP, I agree, the Digital voltmeter kit is an excellent project. -Omni
  15. Omni

    Why is so hard to mimic the Knight Rider scanner Effect?

    Ugh, Tomar has a variety of "flashing halogen" police & tactical/military (Govt) lighting that uses many variations of "timed/alternating/flashing", not limited to the example i provided. The project you outlined is basic in comparison to the designs available through Tomar. The below is...
  16. Omni

    Why is so hard to mimic the Knight Rider scanner Effect?

    Let me try to explain this in an easy to understand manner...   ::) A halogen lamp uses a tungsten filament that is encased inside a much smaller quartz envelope. The gas within the envelope is also unique and contains interesting properties. The latter gas combines with a tungsten vapor which...
  17. Omni

    Why is so hard to mimic the Knight Rider scanner Effect?

    Personally, i would use a string of 12V halogen, the level of crisp bright light is far superior than any LED; my opinion. However, the above will require a variety of power transistors to sink each lamp. Halogen is a decent long lasting bulb with excellent illumination...
  18. Omni

    which amp to build?

    Hi Quincy, What will the amplifier be used for? Audio equipment or Instrument amplification? In the event you plan to build a single channel amplifier for an Instrument; Guitar/Bass etc... Perhaps, you may desire the aura of tube amplification since it far exceeds silicon concerning...
  19. Omni

    High Voltage Stun Gun !

    http://www.safetyenforcement.com/stungunlaws.html -Omni    :-\
  20. Omni

    Simple multimeter question.

    Understood  :)
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