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Electronics => Beginners => Topic started by: outofstepper on June 07, 2012, 02:10:24 pm

Title: noob question: function generators
Post by: outofstepper on June 07, 2012, 02:10:24 pm

Ok, this question might get a lot of eyes rolling and/or tears from laughter.. but here
we go..

Entry-level FG ($$$) vs. 555-based shoebox FG (~free)

used for learning / eventually debugging broken stuff.

So i won't be getting the freq range / stability / accuracy / ease-of-use of a pro unit.. understood..
but what I'm not quite so sure about is if I'm starting out with both hands tied behind my back
because of any (obvious?) limitations I might not be aware of.

Thoughts?

and thanks!
Tony

Title: Re: noob question: function generators
Post by: Bored@Work on June 07, 2012, 02:21:11 pm

What do you have to lose? If you think the free 555 shoebox will do, then start with it? While using it you can save more money to buy a real generator, and learn things the hard way. Aka the school of hard knocks.

Title: Re: noob question: function generators
Post by: Lightages on June 07, 2012, 02:40:21 pm

As long as you can get a decent sine wave out of the shoebox parts then I second the post above.

Title: Re: noob question: function generators
Post by: T4P on June 07, 2012, 03:28:52 pm

One should simply start off with building his/her own "555" based Sig Gen, thy learns more that way

Title: Re: noob question: function generators
Post by: hlavac on June 07, 2012, 10:32:53 pm

How about something designed for the job, like XR2206 (http://www.electronics-diy.com/function-generator-kit-xr2206.php)? Do they still make them? Or are there any modern alternatives?

In fact, as a pure electronics hobbyist, I'm missing a function gen too! Maybe we could design one together? :)

Title: Re: noob question: function generators
Post by: MikeK on June 07, 2012, 10:41:49 pm

Before I bought my Instek I was considering this: http://www.electronics-diy.com/store.php?sel=kits&sub=function_generator (http://www.electronics-diy.com/store.php?sel=kits&sub=function_generator)
Only $40.

Title: Re: noob question: function generators
Post by: Barryg41 on June 07, 2012, 10:56:16 pm

I ordered and put this kit together to mess around till I decide on a proper FG.

http://www.kitsusa.net/phpstore/html/Elenco-FG-500K-1MHz-Function-Generator-Kit-5974.html (http://www.kitsusa.net/phpstore/html/Elenco-FG-500K-1MHz-Function-Generator-Kit-5974.html)

Works for me right now!

Title: Re: noob question: function generators
Post by: outofstepper on June 08, 2012, 01:20:08 pm

Thanks guys.
That kit from electronics-DIY looks interesting and I'll likely pick it up.
 -- two minor points though (not complaining!), the freq range selector
is pcb mount dip switch so if I wanted to put this in a nice case I'd have to find a selector switch
(I assume only 1 of the four pins goes high to select).  Second, the freq counter kit is nice too but
resolution in 10Mhz steps.

Beggers being choosers?  Maybe.  ;D

Thanks again!
Tony

Title: Re: noob question: function generators
Post by: caroper on June 09, 2012, 08:47:41 am

Quote from: outofstepper on June 08, 2012, 01:20:08 pm

Thanks guys.
That kit from electronics-DIY looks interesting and I'll likely pick it up.

Before you do take a look at this one:
http://www.changpuak.ch/electronics/FG2206.php (http://www.changpuak.ch/electronics/FG2206.php)

I am not sure if there is a kit, but it is very well documented.
Look under Project Details on the Right below the clock.

Cheers
Chris