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  1. Omni

    Help the Newbie

    True, Bias a TIP120 or TIP35 from the output of the 555 (depending on current demand). Battery suggestion: 6V Lantern. In the event the project requires less weight due to mobility experiment with a couple High current C cells (nicad).
  2. Omni

    Simple multimeter question.

    "I'm just beginning to get into electronics and stuff, so I may be visiting this site regularly!" What part of the above sentence do you not understand? A functional VOM (analog) is usually a part of every test bench, since the above individual is new to electronics learning to use an analog...
  3. Omni

    Simple multimeter question.

    Learning how to use an analog meter is essential, understanding the multi-ranges will provide a keen experience concerning other measuring devices. Example: Remember, learning boolean algebra as applied to digital circuits? The calculations as to how they were applied seemed somewhat vague...
  4. Omni

    A Project with a puzzle

    http://www.imagesco.com/articles/1490/01.html Read through the above post/link, the information along with detailed drawings may be what you are looking for. -Omni
  5. Omni

    PCB drill press design

    Hi blueroomelectronics, The type drill press you provided in the pic is not a good choice for PCB drilling. Remember, when looking at a press other than a dremel always firmly grab the chuck (jaw) and shake it to feel if their is ANY horizontal movement. Typically, PCB drilling requires an...
  6. Omni

    PCB drill press design

    Whoa Chris! The press you built resembles one of those unique inventions Leonardo da Vinci tried to build... Listen, if you are ever a cast-away on a deserted island i am "POSITIVE" you will survive!
  7. Omni

    0-30 Vdc Stabilized Power Supply

    The Astro-Med dash10 is a high end multi channel chart recorder used to chart a multitude of variables in graph form. The results while testing will show conclusive if an outside problem has occured. Additionally, how you can criticize Agilent is totally beyond my understanding, the latter...
  8. Omni

    Transferring artwork on to a PCB

    Placing a sheet of PnP (blue) into a copying machine and using your artwork on the top plate will work but the end result will be a 2nd generation output. Since the process above must be performed in 2 steps, the internal copier generates an image then the image is fused to the PnP. Printing...
  9. Omni

    So how do i create a PCB from schematics in eagle please

    Designing a PCB is not as easy as one would believe. Example: audio amplifier circuit; Tube & Silicon. Unfortunately, most PCB software defaults to linking the ground plane to all components with a connection to the ground net. One must manually exclude each of these with "forbidden"...
  10. Omni

    0-30 Vdc Stabilized Power Supply

    Fear does not resolve into any formal test, maintaining a controlled method is an engineering approach/method that deserve's merit both from a logical standpoint along with a more calculated technique! Furthermore, i stress a prior post notation: The above is an abridged Agilent power supply...
  11. Omni

    0-30 Vdc Stabilized Power Supply

    Load Transient Recovery time Load Effect Current Limit Characterization PARD Efficiency & Power Factor Start-up response Turn-off response Temperature variation The above is an abridged Agilent power supply test method that is used within the engineering community. Additionally, i am not...
  12. Omni

    Facial soldering mask. What to buy?

    Any of the three will provide adequate protection concerning soldering. However, if in doubt you can contact 3M EHS Department. http://www.3m.com/ Select the particular location and use the contact sheet (email).
  13. Omni

    0-30 Vdc Stabilized Power Supply

    Are you familiar with the curriculum requirement concerning Electrical Engineering? In order to take an Advanced class study at Penn it is usually administered on a Graduate level. A variety of courses are necessary before the latter course is even available. My home laboratory could never...
  14. Omni

    Facial soldering mask. What to buy?

    Hi Pajarico, A fume extractor will not cause any cold solder joint problems, the latter is extracting the air away from the solder joint. True, it is not advisable to blow on a solder joint while it is forming, the latter is also true in reference to cleaning the joint with alcohol. Always wait...
  15. Omni

    Please help me!!? emergency!! FINAL PROJECT!!

    The below link appears to have many F/X circuits/schematics etc... Building a multiple effect unit is simple combining a group into a controller. Regardless, as to viewing the effect as pure digital is subjective, generally somewhere in the path a D/A - A/D is occuring. Eventide along with...
  16. Omni

    Facial soldering mask. What to buy?

    The link provided below is a high quality mask for soldering, view the link description. "Workplace applications include welding, brazing, soldering etc..." http://filtera.stores.yahoo.net/3mmod82n95pa.html Today, it is also advisable to simple remove the solder fumes via an extractor, the...
  17. Omni

    Circuit Diagram Schematic Sites.

    Free service manuals along with user manuals can be noted at the below sites. Additionally, if you can be more specific: make/model i am sure the forum group can provide a better direction etc... http://www.eserviceinfo.com/ http://bama.edebris.com/manuals/ -Omni
  18. Omni

    0-30 Vdc Stabilized Power Supply

    0-30VDC Stabilized pictures. The supply was completed around 6 months ago, what an excellent project; a true performer! Hopefully, i can post some pictures showing the enclosure and digital display module; magnificent original design! In the past i really enjoyed taking digital pictures...
  19. Omni

    0-30 Vdc Stabilized Power Supply

    The original design when properly built will work without any problems. I favor the latter supply over my BK supplies along with an Hp supply. Although, the BK & Hp can provide much more current, the simplicity of the 0-30V bench supply is far more useful for my purpose. Added note: as i...
  20. Omni

    0-30 Vdc Stabilized Power Supply

    I remember at PENN a variety of students that always wanted me to provide an outline concerning a completed project; always looking for the answers without making any attempt on their own.   :'( I would kindly state the below in a very respectful manner: The only way you will learn the...
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