Oscillator issues causing me pain and suffering

Hi Everyone! This is my first post here, and I hate to start by begging, but I got a problem. I'm a test tech trying to pretend I know how to design circuits, and I'm having a lot of trouble with this.
I've gone through my textbooks, looked online, and found nothing that will help. I'm designing a variation on the classic tremolo effect, and want to do it the old school way. Don't ask me why, I like making things hard on myself.

I need help building a Triangle Wave generator with the following parameters:

Must use LM324 Quad Op Amp (because I only have 45 of those and nothing else close)
0-+5Vdc supply (will be used w/ a 9v DC wallbug, then to a LM7805 regulator)
Variable output Freq. range of ~.5-20Hz
I don't think output V range is important, I can throw another stage in to boost it to rail to rail, but rail to rail output would be nice.

Any ideas or pointers? I'm at the point of just throwing components at the circuits I've seen so far, and it's a huge stumbling block on my progress. Hey, I'm just a tech, not some kinda fancy engineer, lol, so be nice.
Anyway any help would be greatly appreciated.

Added after 1 hours 8 minutes:

Woot! got me a clean triangle wave. It's the wrong F, wrong DC offset, and wrong level, but I can tweak those. I'm all happy now! Now I just need to adjust the F range from 566Hz to, well, it starts freaking out at about 30 khz. might need a little work to get it to .5-20hz.

Perhaps you can post a schematic of what you have. It would save a lot of questioning on our part.

KEN

Schematic? Meh, I'm not quite done drawing it yet. I've gotten it pretty much functional, I just need to get some different pots to limit the ranges, and make sure they're linear, not audio taper this time, lol. Outside of a narrow mid-range on both freq. and duty cycle, I either get craziness, or rails, so that tells me I need to use much smaller linear pots with resistors on either side to hold the adjustments within that range. I ended up combining parts of a few schematics I saw around, and basically threw a handful of components at it till it oscillated, now just a little tuning and I'll have a nice LFO with freq. independent duty cycle control.
I've got the F range down to 3.1(lowest my counter will pick up) and about 250, so w/ the right resistors I'll be able to tune it to my desired .5-20Hz range

Seriously, I'm just now sketching out the schematic. You know, I bet I could just buy a chip for this, but I like doing things the hard way

Hi Drinky...
I say, you have to change the 10 KOhm resistor, no, not these here, that to right hand, over the pot: to 1,234 Ohm!
Seriosly;
If you will work seriously(at Edaboard too), you will up load to first minimum a scanned sketch as schema= then "a picture says more as these ca. 100`s of words" from you!
Sorry...
K.

Unfortunately, I don't have a scanner, a camera, Visio, or enough familiarity w/ schematic drawing software to upload original drawings at this point.
But, I've solved the issues I needed solving, and only need to do a bit of fine tuning right now. Which means going to Radio Shack and buying a few 14cent parts for 1.99 each.
Anyway, I much appreciate the attempts to help, but I think I'm set until the next roadblock comes up

Seems me; you wish only to try a chet_its than the wrong threat...
K.

karesz said:

Seems me; you wish only to try a chet_its than the wrong threat...
K.

Click to expand...

Being brand new to this board, I have no idea what you are saying there.

Maybe he means:

Seems [to] me; you wish only to try a ch[a]t_it[']s th[e]n the wrong threa[d]...
K.

Ken

Added after 9 minutes:

DrinkyCrow,

I use ExperssPCB to do schematics: **broken link removed**
It's free, pretty intuitive, has a good component library, and is easy to make new components.
It exports to a BMP image. I usually load the BMP file into Microsoft Picture Manager, crop to size, and export to a GIF to reduce the file size.
If you get there, it also has a PCB layout program that can be linked to the schematic.

ken

Thanks Ken, I went and got Express SCH and Express PCB, I'll try to figure out how to work with them. And when I started this thread, I did have a problem, I just managed to figure it out before I got any replies. I'll make sure to keep any chit-chat topics to appropriate threads from here on out.