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World's simplest transmitter, period.

 
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World's simplest transmitter, period.
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warden
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Joined: 18 Apr 2003
Posts: 4

Post World's simplest transmitter, period. Reply with quote
Is there another ic that can be used inplace of the 74LS513?
And also anyone know a good website to Cross Ref. IC'S?

Thank yes i'm a newb

WARDEN
Fri Apr 18, 2003 6:11 am View user's profile Send private message
warden
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Joined: 18 Apr 2003
Posts: 4

Post ic Reply with quote
Is that a 74LS13, Or a 74LS73

Thanks
Sat Apr 26, 2003 3:56 am View user's profile Send private message
hari
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Post period Reply with quote

That is 74LS13:It is a pulse generating hysterisis based IC
Hari.

Fri Jun 13, 2003 6:41 am
EVIL Teken
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Post Doesnt Work ! Reply with quote
I have tried to make this so called *simple* unit work on several occasions, and countless hours later...

And still nothing !!!

I would appreciate some help on this little project. I have all the correct values and parts on hand...

You may contact me at teken26200@hotmail.com

Regards

EVIL Teken...
Sun Jun 22, 2003 4:41 am
pcs
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Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
Just a quick note, this thing does work, but it is merely a demonstration of
what can be done with digital circuits. It oscilates at 20-40 MHz and what
you hear on the radio is 3rd or 5th harmonic.

But as far as stability and audio quality are concerned, you'll be very
dissapointed. Its just a proof of concept, nothing more.

Hey, did you check the simplest AM transmitter? Its a program that
turns your PC monitor into Am transmitter.

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Marko - PCS Electronics
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Turn your PC into a FM radio station!
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fax +386 4 2316 128
Mon Jul 14, 2003 11:31 pm View user's profile Send private message Visit poster's website
ST
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Post World's simplest transmitter, period. Reply with quote
I understand the concept of your circuit. The carrier frequency is generated by a Schmitt trigger NAND gate with a feedback loop and it
is tunable with the 33pF capacitor. It looks good for sending out morse codes. However, I don't understand how any voice signal picked up from the mic can be transmitted. Also, what does the optional 10uH do at the output of the buffer?
Thu Jul 31, 2003 6:23 pm
TreyFlip[aWs]
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Post wow, you guys are so cool. Reply with quote
This is so cool. I am a junior in highschool in an electronics technology program at a voc. tech. school. I think that its cool all this stuff, about the chips, and the transmitting. COOL.
Sat Sep 20, 2003 3:57 am
pcs
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Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
Well, microphone sort of modulates this oscillator. It doesn't sound
that good, but it works, just barely.

As for the 10uH, give it a try and you'll see what it does. Check it out
with an oscilloscope.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sat Sep 20, 2003 2:27 pm View user's profile Send private message Visit poster's website
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