Electronics > Beginners
DIY Function Generator
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kripton2035:

--- Quote from: PA0PBZ on September 27, 2012, 06:54:34 pm ---Or old school: an EPROM (remember those?) with R/2R on the data lines, a counter on a number of address lines and the other address lines to select the waveform  :)

--- End quote ---
typically what's inside a dds chip isn't it ?

I bought this on ebay :
http://www.ebay.com/itm/-/170682095715?item=170682095715
a microcontroller, a display and voila...
PA0PBZ:

--- Quote from: kripton2035 on September 27, 2012, 07:00:34 pm ---typically what's inside a dds chip isn't it ?

--- End quote ---

Of course, but the EPROM FG can be build on a breadboard on a rainy sunday afternoon.  ;)
Also, you can put sine, square, triangle and such in it very simple.
G7PSK:
You could get one of these and re engineer it. Or just use it as is.

http://www.ebay.co.uk/itm/190649700756?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649#ht_8352wt_952
jerry507:
As T4P said, just get a dds. Unless the frequency you want is really low or you want insanely high quality outputs, it's the easiest solution and it'll give you some good experience designing relatively high frequency circuits.
M0BSW:

--- Quote from: kripton2035 on September 27, 2012, 07:00:34 pm ---
--- Quote from: PA0PBZ on September 27, 2012, 06:54:34 pm ---Or old school: an EPROM (remember those?) with R/2R on the data lines, a counter on a number of address lines and the other address lines to select the waveform  :)

--- End quote ---
typically what's inside a dds chip isn't it ?

I bought this on ebay :
http://www.ebay.com/itm/-/170682095715?item=170682095715
a microcontroller, a display and voila...

So will this you'd just put a display with it some bnc sockets a box, and you have a function generator  !!!!!!!


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