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  1. HarryA1

    Transformer for voltage booster?

    Hello from cold and snowy NE PA, In my quest to convert 9 - 12 volts dc into 140 volts dc I purchased a "40W DC-AC 12V To 220V Step-up Transformer Boost Module Inverter" via Ebay. I also purchased a 220 volt to 120 volt 50-60 hertz step down transformer; the type travelers use. But the...
  2. HarryA1

    Stupid pop-up window

    Is there some way to get read of the %^^*)(*^ pop up with " would you like to receive notifications.... ? I DO NOT WANT ANY!
  3. HarryA1

    What do you do with a 350 Farad capacitor?

    You could charge the cap. with  solar cells during the day and light an LED at night? No batteries required! see...
  4. HarryA1

    n-chanel eMOSFET data?

    Hello from NE PA, Where do you all find data on MOSFET transistors? I look on ebay  for MOSFETs but most do not have specs so you have to search for a data sheet, download it, open it, and find it's not what you want! I am looking for an n channel  eMOSFET for a class D amplifier that has...
  5. HarryA1

    TENS machines revisited

    Hello from NE PA, A question for you. How to TENS machines generate 40 to 60 volts from say 4.2 volts without using a coil or transformer? Pictured is a TENS circuit that is about 1.26 inches by 1 inch. The battery is on the reverse side of the board. thanks in  advance, HarryA
  6. HarryA1

    11.1 volts to 8.0 volts ?

    Hello all, I need to connect an 8 volt electronic speed control to an 11.1 battery. I have an 8 volt regulator and a power mosfet. I have not worked with mosfets before so I am puzzled on how to make the connections and what values of resistors are required. Please take a look at my diagram...
  7. HarryA1

    Checking new PC power supply

    I have a new power supply that I would like to check before installing into the computer. On bench testing it I get no voltage at all. Is thid correct? I am thinking that perhaps there is some type of interlock so you only get voltage when it is installed? thanks in advance.
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