World's simplest transmitter, period.

[warden]

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

[warden]

Is that a 74LS13, Or a 74LS73

Thanks

[hari]

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


Hari.

[EVIL Teken]

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...

[pcs]

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.

[ST]

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?

[TreyFlip[aWs]]

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.

[pcs]

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.