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Old 2nd March 2005, 09:43 PM   #1
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Default need a signal generator pcb layout or schematic

hi
i m lookin for a signal generator w frequancy control , rate & time control , & with shape and soft out control knobs & with a puls function ...
i ll be so grateful if anybody help me w that
thnx
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Old 2nd March 2005, 10:55 PM   #2
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I have a schematic that came from a laboratory at my college. It is in a word document. The generator is based around the XR2206 IC. It isn't the best around but it was common in older waveform generators and it gets the job done. It does not have a pulse function, however. I can email it to you if you are interested.
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Old 3rd March 2005, 10:17 AM   #3
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thank u so much .. email me plzzz ( i ll email u first ! )
does it have the frequency adjusment ( around 15 to 200 hz )? ... if not how can i adjust it ? ... any idea how can i give a puls function to it ?
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Old 3rd March 2005, 10:35 AM   #4
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Default Use your computer to generate audio.

http://www.nch.com.au/tonegen/

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Old 3rd March 2005, 12:03 PM   #5
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Default can i change the frequancy with changing resistors ?

hi man
thnx a lot for that software . it s really great , but i m usin the cool edit pro software for generatin tones it s doin exatcly like the program u sent , but i wanna tryin to bild somethin lke that ... i v searched a lot i found a generator in : http://www.interq.or.jp/japan/se-inoue/e_ckt18.htm ,,, it seems i can adjust a frequancy with changin r1 & r2 or c1 & c2 ( f=1/(2*(3.14)*c*r) ) ...
if i change the resistors from 1m to 79k i can change the out freq from 15 to 200 ! .. any idea ? ... anybody can help ? .. am i right ? ... now another thing how can i adjust intensity ??? can i do it with changin the input voltage ? ... and any idea how can i give a puls function w rate control to it ??? can i use a pulser circuit to control it ? plzz help ...
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Old 3rd March 2005, 12:41 PM   #6
jaycee is offline jaycee  United Kingdom
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Check out the MAX038 chip from Dallas Maxim. Sounds like it's exactly what you want.

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1257
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Old 3rd March 2005, 04:52 PM   #7
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Unhappy 2sk30a similar

hi ..
yeah man that s exactly wat i need but i will NOT find it in my whole country ... i m just came back from the biggest electronic store in my city for buyin the parts of the schematic i just sent in my last replay in this forum i coud nt find the 2sk30a ...
any similar for that ??? any body help ? wat can i use as 2sk30 ?
& still no idea for puls functionin ?
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Old 3rd March 2005, 05:12 PM   #8
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http://store.americanmicrosemiconductor.com/2sk30a.html
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Old 3rd March 2005, 06:09 PM   #9
jaycee is offline jaycee  United Kingdom
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Try ordering the MAX038 as a sample part from Dallas Maxim and see if they will send it to you in Egypt.
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