I am learning morse code. There are software available which convert any text into morse and give the output to the headphone jack. I was wondering if this sound output at the headphone/speaker jack can be used to power a LED or incandescent bulb? Would be thankful if anyone can suggest a solution. Thanks Nitin
You can use your hi-fi system: Use one speaker output for a speaker, if you want to hear it and connect a 220 ohm resistor and a LED in series to the other output. Adjust balance and loudness that you can hear something in the desired loudness and see the LED light, if there is a signal.
A incandescent bulb is not a good idea, because turning it on and off often, will wear away it fast.
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Frank Buss, fb@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de
I learned the Morse long ago, but I really don't think I could easily convert light to letter very easily. One problem for me would be looking at the light and looking at my sheet. I know it would be a huge problem watching several sources mixed together.
I think you will find that Morse is more easily/quickly comprehended audibly (or in mechanically/electrically written text) than visibly. In situations where only visible communication is possible, reliable Morse transmission speed may be reduced to as much as 1/3 that of other methods. It's also visually exhausting for longer messages - wearing out the eye's point-perception capacity, quite rapidly.
1) The OP doesn't know which end of a soldering iron to hold.
1a) He should be posting ONLY to sci.electronics.basics.
2) As he is MULTI-POSTING news: snipped-for-privacy@l33g2000pri.googlegroups.com from Google, he is quite clueless and will see *this* blob (in a proportional font)
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and not know what to do with it.
3) Even if he knew how to get to a monospaced version, like
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your ASCII technique will likely leave him baffled (even if you didn't leave out the characters where junctions are supposed to be).
Frank's answer (and mine) leaning toward COTS stuff seems more apt. Even Bill Bowden's response in the s.e.b thread (to use a step-up transformer) seems over the OP's head.
That's what the evidence says to me. Of course, I could be wrong.
FWIW, you're one of about two total google posters I've ever seen come back to read responses. I think they expect the answers to show up under their pillow or something. ;-)
On a sunny day (Fri, 29 Aug 2008 10:43:58 -0700 (PDT)) it happened JeffM wrote in :
Sure, just for fun, here is the ltspice version ftp://panteltje.com/pub/ac_detector_1.gif
You will see about 11mA LED current for 1V input @ 1000Hz. The LED brightness can be set by the volume control. As the pulses are 1000Hz, that seems like constant 'on' during key presses.
Fun for me to play , if it educates anyone, great. He posted to the right group with s.e.d.
Thanks a lot for the great response. Especially Jan for the circuit. As deduced from the evidence, I am a newbie. Dont have much practice but do surely know which end of the soldering iron to hold. Need the info to help somebody else implement it. However, didnt quite understand all the text symbols on the circuit. However, thanks for it, I will work it out. Thanks again, Nitin
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