Recent content by heathtech

  1. heathtech

    pressure sensor.

    I had wondered about this myself :P. I had assumed it was probably RF, but I had also considere doing a similar thing (in a much slower moving rotation) with brushes kind of like the brushes in a motor.
  2. heathtech

    Beginning Projects

    Well, ordering from the internet is probably your best bet. Google Digikey, Newark, or Mouser Electronics. But, if you live in or near a metropolitan area, I'm sure you can look in the phone book yellow pages and with some luck, you might find an industrial electronics supplier or something. In...
  3. heathtech

    FM Radio

    All inductors have coils, by definition.
  4. heathtech

    Pressure tranducer Circuit help!!

      I'm not exactly sure what you need here, please go into more detail.   As far as a wheatstone bridge goes, I can help you with that. Do you know what a strain gauge is? It is a pressure transducer that varies resistance in a linear fashion when pressure is applied, and can be installed on one...
  5. heathtech

    Beginning Projects

      Ok, go to an electronics supplier, radio shack will do for a beginner, and buy a variety of resistors, solder, a pencil soldering iron, a pack of 9v batteries, a 9volt connector (you know, pad thingy with male and female terminals and red and black wire sticking out. Matter of fact, buy two or...
  6. heathtech

    Beginning Projects

    It depends on how complicated you want your first circuit to be. Google for Variable regulated power supply schematics. I don't know how much you know by way of electronics theory, laws, etc. Tell us what you know about electronics and then someone can advise you. If your knowledge is small, I...
  7. heathtech

    R-S flip flop

    Well, flip flops are bistable multivibrators. An input trigger causes the two outputs to "flip-flop" states. The ouputs are usually labeled Q and /Q (not Q). There are two transistors inside the flip-flop arranged symetrically. The input trigger is applied to both at the same time, but due to...
  8. heathtech

    Soldering Help

    The Weller model#WES51 iron that I use is ESD safe. It is reasonably priced but not cheap, and I use it all the time with no ESD issues.
  9. heathtech

    Most interesting electronics-area?

    feedback and control circuits and systems.
  10. heathtech

    conversion from miliohms to voltage circuits

    Are you referring to 100 ohm platinum RTD temperature probes when you mention Pt100? If, so, what is the project? I know a few things about temperature control circuits and might be able to help.
  11. heathtech

    A timer question

    I have an idea for the 555 timer that might work.  Please someone correct me if this is wrong. I don't want to post a mistake, but I wanted to figure it out and have someone correct me if I'm wrong:
  12. heathtech

    Limitation of current !!

    My guess is that you are driving the amplifier too hard, causing overmodulation. There is no amplifier with infinite gain, so if your signal is driving too hard, the peaks of the signal get chopped and cause distortion.
  13. heathtech

    HELP 4+0 Link intercom circuit analysis

    I think everyone would tell you to be more specific and not to double post the same topic. At least provide some details.
  14. heathtech

    Can I ask this?

    Kids these days like to wire up all kinds of stuff on their automobiles (neon lights, stereo amps, crossovers) ...Maybe you can teach them how to do it without frying everything!
  15. heathtech

    h-bridge dc motor control circuit Reworked

    Hey folks After several suggestions from other folks (2 guys named Len and L. Chung) on the net I have a new finished schematic to post. I tried putting caps on the motor, but that didn't do the trick. As you can see by the new schematic, I added a schmitt trigger and some caps on the board. The...
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