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  1. hevans1944

    27Mhz FM Transmitter and receiver circuit.

    Wow! Thank you, Martin, for that. It does look like I need to get out more. I didn't realize that UK (maybe other parts of the former British Empire, like India perhaps?) used FM exclusively and AM was verboten. So maybe @Rakesh nampalli isn't wandering too far off the beaten path after all...
  2. hevans1944

    Frustration over IR transmitter and receiver how do I..?

    As per usual, it looks like @CABBAGE either gave up, since he didn't get the immediate answer he wanted here, or went on to post his questions in other forums. The Adafruit website has some interesting projects and parts for sale that are used to implement a modulated 38 kHz carrier IR remote...
  3. hevans1944

    bending leads on IR transmitter,is it bad?

    Most infra-red LEDs emit at wavelengths that your cell phone camera can "see," even through its infrared-suppressing filter (because the LED is sooo bright!). This works for most "pocket cameras" too. Try it and let us know what you find. With regard to lead bending, look closely at the...
  4. hevans1944

    27Mhz FM Transmitter and receiver circuit.

    This thread is becoming aged, and @Rakesh nampalli is probably a drive-by poster who is no longer monitoring the thread. I will reply anyway because I have little else to do right now. AFAIK, 27 MHz was reserved for CB radios and was NEVER used for FM communications, narrow-band or...
  5. hevans1944

    Adding a light in parallel to existing loudspeaker circuit

    Excellent idea, except you can probably control the lights by briefly superimposing Touch-Tone signals on top of the PA audio. I have sent you a PM (Private Message conversation) on how this can be done relatively inexpensively. It might even be a project you can have completed locally. It's...
  6. hevans1944

    Making a FM transmitter

    Perhaps too advanced for your current understanding, but keep at it. Things become much clearly after a few years of study. Lab work (hands-on experimentation) is important too... you learn a lot about what doesn't work with lab work, and maybe pick up a few pointers on what does work. As for...
  7. hevans1944

    Making a FM transmitter

    Back in the early 1950s there was a guy named Earl "Madman" Muntz who made a fortune by pruning parts from TVs, one-by-one, until the last part removed made the TV stop working. Muntz then had the part soldered back into place and sold the "newly designed, simplified TV" at a much larger profit...
  8. hevans1944

    Please explain this resistance reading

    The following is a true story from my past. While attending grade school, around the time that the Soviet Union launched their Sputnik low-earth-orbiting satellite, the first of its kind in the world, one portion of our school week was devoted to Science. IIRC, that particular week we were...
  9. hevans1944

    Please explain this resistance reading

    CORRECTION TO POST #28, REGARDING POLARITY I don't know what I was thinking when I wrote: I can see now where you got the idea. It is all over the Internet!. And it is correct. I am the one who was confused. Please accept my sincere apology. Somehow I must have been thinking that a...
  10. hevans1944

    Please explain this resistance reading

    The answer to Question (1) is incorrect. Explanations follow. The answer to Question (2) is incorrect. Explanations follow. (1) Except for the special case of superconductors, which actually do exhibit zero resistance, it is impossible to create a short-circuit with zero resistance because all...
  11. hevans1944

    Please explain this resistance reading

    This is so true, and it has misled many a novice down the primrose path to making an assumption that there is something wrong with their switch-mode power supply transformer simply because their multimeter "says" the winding is "shorted." As you noted before, it is "shorted" for DC, which it is...
  12. hevans1944

    Please explain this resistance reading

    The correct answer is there is no minimum resistance that constitutes a short-circuit, nor is there any maximum resistance that will prevent a short-circuit. The resistance of a short-circuit is relative to the circuit in which it occurs. You must always consider this before deciding whether or...
  13. hevans1944

    Kayak outboard motor

    Maybe it's because you are in the United States, whereas @Lance0070 is located "down under" in New Zealand, but for whatever reason there is an obvious failure either to communicate or for Lance to follow simple instructions. Maybe both. Given the situation, I would not bother to try to provide...
  14. hevans1944

    Please explain this resistance reading

    It is commendable that you are trying to learn the basics of electricity before attempting to build or repair anything. Short circuits are basic to learning the art of electricity. So let's discuss them a little bit more. I will now provide my definition of a short circuit, which may differ a...
  15. hevans1944

    Please explain this resistance reading

    Please, let's not let this thread wander off-topic into back and forth accusations that may or may not have any substantial substance, relevant to measuring short circuits with a digital multimeter. I think it more important that we try to discuss why anyone would even want to do this. No one I...
  16. hevans1944

    Please explain this resistance reading

    Sure. First, dig out whatever documentation came with your digital multimeter and read and understand it. If there are some things you don't understand about your multimeter after reading the docs you have available, visit this link and some of the web pages you will find there. If none of those...
  17. hevans1944

    Long Range Peer to Peer?

    You set up a local area network (LAN) based on WiFi. Google how to do this.
  18. hevans1944

    Attract fish by sound, light or anything else

    This thread is going nowhere. So howsabout a little out-of-the-box suggestion: mount a water-proof loudspeaker slightly underwater on the side of the boat. Play some fish-attractive sounds through it. Maybe try recording "Here, fishy! Fishy, fishy, fishy!" Search the Internet for fish-attracting...
  19. hevans1944

    Resistor issue

    So, the OP has gone from burning contacts to burning resistors, eh? Nice catch, Edd, noticing the "resistor" is actually a negative-temperature-coefficient thermistor. Haven't seen those is quite awhile! Perhaps this is a bridge better burned than crossed. From now on (stick tongue firmly in...
  20. hevans1944

    Interesting circuit usb with 2 led lights with different brightness

    I must strongly agree with @Bluejets suggestion to @stspringer to use Jeremy Blum's videos to learn about the Arduino, how to use it, and how to program it. This series of videos is very much the 'hands-on" approach to learning, and the "how" of it is explained very clearly with excellent...
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