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| Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution. |
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7th November 2007, 03:32 PM
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Cristal Radio
Hi guys, i am building a simple crystal radio. I need a circuit that will boost the output signal to drive regular headphones.
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7th November 2007, 03:35 PM
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Many people use an LM386 little power amplifier IC to drive headphones.
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Uncle $crooge |
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7th November 2007, 03:41 PM
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I've got this strange feeling of 'deja vu'
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7th November 2007, 10:17 PM
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OK, thanks. Can you give me a pinout?
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8th November 2007, 12:09 AM
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You need to learn how to do this for yourself.
1. Goto http://www.national.com This is the URL for National Semiconductor, the original manufacturer of the LM386. 2. Enter LM386 in the search box. It will take you to this page. http://www.national.com/mpf/LM/LM386.html 3. Download the PDF version of the datasheet. which looks like this: http://cache.national.com/ds/LM/LM386.pdf You'll need Adobe Acrobat reader which is also a free download from Adobe Systems. Now that I've taught you to fish, I expect you'll be able to feed yourself for a lifetime, or some reasonable approximation therof. Good luck and happy fishing. Last edited by Papabravo; 8th November 2007 at 12:13 AM. |
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8th November 2007, 03:59 AM
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Quote:
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8th November 2007, 08:45 AM
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8th November 2007, 12:16 PM
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Alright, thanks. I guess i should tell you i'm 12. This is not a school project.
I will look at datasheets. |
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8th November 2007, 02:42 PM
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Quote:
JimB
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Experience is directly proportional to the value of the equipment ruined. |
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8th November 2007, 03:06 PM
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Thats Yogi Bear.
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8th November 2007, 03:10 PM
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If you are really interested in a crystal radio I might be able to dig up a schematic from my archives. It's a crystal radio however it has a vacuum tube RF amp that delivers a higher level to the crystal (detector). The author claims the quality of sound is better because the diode is operating more linearly. The higher voltage comes from 9 volt batteries in series - maybe 10 or 12 of them. Along with improved quality is the increase in output - enough for headphone per the author.
Yes, you could the same with a transistor or IC - amplify the RF rather than the audio.
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stevez |
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8th November 2007, 03:22 PM
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8th November 2007, 03:36 PM
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Your Fortune City link does not work.
Attach the schematic here to your reply.
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Uncle $crooge |
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8th November 2007, 04:08 PM
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Quote:
Code:
http://members.fortunecity.com/timevehicle/free_energy/crystal_radio.gif |
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8th November 2007, 04:26 PM
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Uncle $crooge |
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