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  1. J

    pic16f627a interface

    it is gonna depend on the code.
  2. J

    New posts

    I guess one way is to use the "Get new posts" link in the upper right corner. As long as you keep pressing the back button it shouldn't refresh the page which means nothing will update, giving you as long as you want to read the threads. I like steves way to. Maybe we can get steves link to be...
  3. J

    Amplifier circuit questions

    1. The gain of the op-amp is 10? 47k/4.7k = 10 2. This is a non-inverting amp? 3. The transistors in this setup kind of confuse me. The PNP transistor connected to the +15V side will only turn on when the base is more negative then the emitter. The 180Ohm resistor will have a voltage drop...
  4. J

    I have issues with MAKE: Electronics experiment 8? (The link may not work so tell me

    It might help if you took a picture of the underside of the relay so we could see the pins. Then someone could use their awesome ms paint skills and draw you a picture to copy verbatim on how to make the relay "click". The click as steve has suggested is VERY important because it determines if...
  5. J

    New posts

    Your cookies are updating probably in 15 minutes which is changing your last login time, so now threads older then that time will not be displayed as "NEW" This as far as I know needs to change at the code level. Personally I could go for a longer time period, I have had it happen to me when I...
  6. J

    Microcontroller should read a text file from an SD card and display it onto an LCD

    http://www.jeremyblum.com/category/arduino-tutorials/ this might be helpful to.
  7. J

    Microcontroller should read a text file from an SD card and display it onto an LCD

    http://arduino.cc/en/Reference/SD http://arduino.cc/en/Reference/LiquidCrystal They sell SD shields as well.
  8. J

    Ohms?!

    no they are not the same, one is 1000 times more resistance.
  9. J

    Wanted: Stepper motor

    I have one of these, but it is not a unipolar stepper. Mine is a 4 wire bipolar 11Ohms. This is the one you don't need?
  10. J

    Safest way to switch 240VAC

    yeah that is the idea, I am not looking to power the neighborhood. scratch that, diode won't work with AC. :( I am not looking to power my whole house, just some necessities I can't do without. Power for heat, refrigerator, and my network/femtocell so I can have emergency access
  11. J

    Safest way to switch 240VAC

    That wouldn't make a whole lot of sense unless you are talking that they disconnect themselves from the grid when the grid power goes out. If that is what you meant, then I guess I understand since most commercial inverters as I understand it produce power in sync with the grid to sell it back...
  12. J

    Safest way to switch 240VAC

    I got to thinking about what everyone here has said about the guy outside working on the power line. But, what is the difference between me and my generator and a a solar/wind generator back feeding power to the grid? These energy systems don't stop working just because the grid goes out, so...
  13. J

    Safest way to switch 240VAC

    Well I wish it was that easy to get an answer, but I called the electric company and asked them flat out, does work on my side of the meter require inspection? They told me "We don't know, you will need to call an inspector." So I call the inspector and he says "Is it a new installation?", "No"...
  14. J

    Safest way to switch 240VAC

    This is what I had first thought of as a possible solution. The break then make operation of the relay would make sure the two power lines where isolated at all times and that is what I want. safety!!
  15. J

    Safest way to switch 240VAC

    I actually know of a working system like this near to where I live. It is used in a pump house to provide water to some 400 people when the power drops. The generator starts automatically and from what I seen there is a simple relay/switching device that sits between the generator and breaker...
  16. J

    Safest way to switch 240VAC

    I have a generator I bought for my home. I want to be able to hook it up to the breaker box so that when the power goes out I just head out and turn on the generator. My first thought was to use a relay to connect the generator to the breaker box when the power went out. But, this got me to...
  17. J

    Engaging and Disengaging Magnetism

    yes, if I understand your question. electromagnetism is either on or off depending upon if power is applied to the coil.
  18. J

    TV Licencing

    Call the police if you feel you have been harassed. TV's don't send signals they receive signals.
  19. J

    Need Help.

    because it is an archive to a newsgroup mirror. I don't believe EP even owns the newsgroup
  20. J

    What Is This?

    if you go through life worried about dying your life will be pretty miserable. I can tell you that if your kid wants to play with LED's then by all means buy him a couple hundred. It will only nourish that which you want and help build trust for the future. There is absolutely nothing wrong...
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