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can anyone provide me with some schematics for a function generator with only a 147.7 square wave AC signal? Answered

can anyone provide me with some schematics for a function generator with only a 147.7 square wave AC signal? and im trying to make a it as small as possible

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steveastrouk

Best Answer 5 years ago

If this is for "wireless power", just use a 555 timer.

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tykorasteveastrouk

Answer 5 years ago

so if you could get me a schematic of how I could use it

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tykorasteveastrouk

Answer 5 years ago

an actual circuit schematic would be more helpful

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steveastrouktykora

Answer 5 years ago

That WAS an "actual circuit". Plug in the values I worked out, and possibly put a transistor there to drive your coil.

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tykorasteveastrouk

Answer 5 years ago

oh :P (this is why I ask for help)

thx I couldn't recognize it

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tykorasteveastrouk

Answer 5 years ago

everyone keeps telling me that but I haven't learned enough yet to but a schematic together yet

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Josehf Murchison

5 years ago

See helps to be concise.

Try this built right the circuit is about the size of a match box.

full swing.bmp
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Josehf Murchisontykora

Answer 5 years ago

If you cant find a 147.7 try these.

I know you can find 147.5 on the net add a .2 and mix giving you a 147.7

Go higher and PMW down.

Go higher and counter down.

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tykoraJosehf Murchison

Answer 5 years ago

ive been all over the web still cant find any that add up to the frequency im looking for

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Josehf Murchisontykora

Answer 5 years ago

The crystal in the datasheet goes from 30 to 180 kHz

Just order one in 147.7 kHz

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tykoratykora

Answer 5 years ago

and there all out of stock

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Josehf Murchisontykora

Answer 5 years ago

Well if you can’t get a crystal get a SN74LS629 voltage controlled oscillator and adjust it to 1477000 Hz then run the 1477000 Hz through a decade counter like a 4017 to give you a 147700 Hz frequency.

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Josehf Murchison

5 years ago

Now here is a silly question 147.7 what?

Hz, kHz or MHz.

The thought just struck me be concise or you may not get the answer you want.

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steveastrouk

5 years ago

How accurate does the output have to be ? Can you make that frequency from dividing a standard crystal frequency by an integer ?

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Josehf Murchison

5 years ago

That is a very tight frequency.

You can make it with a 555 timer.

But no matter what way you make it you will need a oscilloscope for fine tuning.