Search results

  1. J

    Newb Question: 12v-80ma transistor switch

    Good point. Let it be known that for my last post negative doesn't refer to a negative voltage but rather ground. Anywhere negative is mentioned I mean when connected to ground 0v potential.
  2. J

    Newb Question: 12v-80ma transistor switch

    I don't have the time right now to go into everything you need to know but here's what I can tell you. Transistors are current operated not voltage. A NPN transistor needs a positive current to turn on and the load goes between + Supply and the collector of the transistor. The base is where you...
  3. J

    wild life watching -wireless night vision quetions

    You could set up a motion detector to toggle rec on your VCR or power or some other control method. If you have the ability to record on your computer there are programs out there that will let you setup an "Active" area and when it detects a certain amount of change from one video frame to the...
  4. J

    6vac Transformer design question

    Are you looking to make or buy? I'm sure mouser.com, alliedelec.com, digikey.com, jameco.com someone has these to buy.
  5. J

    Custom keypads suppliers?

    This sight will make keypads anyway you want them with pictures, graphics, etc..... whatever.  ----->  http://www.spectrasymbol.com/  Send them an email with what you want or use their online quote system and they will give you a price. I have tried their products and they are great.
  6. J

    hall element

    Blueprint? You mean pinout or am I missing something?
  7. J

    Hi Five for Radio Shack

    When I first started in electronics I first got desoldering braid then a desoldering bulb and then the spring loaded desolder pump like you had and then i finally bought the radioshack desoldering iron. I have had it for over 5 years now and it still works great. It really is one of the best...
  8. J

    modular digital microscope

    If you included a price that would be better for you. I never hunt down a price. If a price is not lsted with the product then I move on and will find somewhere else to buy from that is willing to display their price for all to see.
  9. J

    Nokia Phone upgrade

    It's probably possible but if it's not possible through firmware/software it's not worth the time and effort in my opinion. Even tweaking the firmware/software of the phone would be a long and difficult unless you really knew what you were doing. I'm not saying I would be able to do it fast but...
  10. J

    12Vdc - 240Vac power converter

    judging by your post and diagrams and everything else I would either buy a 12volt fan made for a car or buy a power inverter from walmart. Walmart has 140Watt (peak) power inverters for around $17-$20 which will be useful for more than just running a fan and probably cheaper than a home brew...
  11. J

    Cold Heat Soldering Tool

    A few things to note. I have owned one of these and returned it days later. It does work but it is very touchy. You have to get the tip just right on the joint for it to heat up and most the time you do have to put some pressure on it. The problem is the instruction book specifically says do not...
Top