Magic Smoke Electronics Thomas Henry 21st Century LFO

via Tim Servo on this electro-music.com thread:
AS21C "Super LFO" PCBs available
"Call it the "Super LFO," call it the "TH-301," call it the "Cucamonga," call it the "LFO with the three page schematic from Thomas Henry's AS21C book," call it anything you like, but we finally have some available!

With some assistance from the ever-talented Dave Brown, we've finished shaking down the first run of PCBs for the TH-301 "Cucamonga" LFO. This is a nifty little unit with some interesting features:
*VC frequency
*Selectable Sine, Tri, Saw or Ramp output
*Gate and Trigger outputs
*Sync Input
*Built in Lag function for delayed vibrato and other similar effects
*Built in Delay (acts like a gate delay) to delay the onset of the "Lag" function
*Delay time period can be started by a keyboard gate (or other similar signal) or by an NC footswitch
*LED frequency indicator, since we all like blinky lights!

PLEASE KEEP IN MIND: These boards are Rev01. As such, they need a few tweaks for things that will be fixed on a later rev. You'll need to do two cuts, add two jumpers, and add a couple of parts. I would NOT recommend this for a first project. You really should have built a few things before this, and have an oscilloscope for tweaking the waveform trims. Still, if you've been wanting a very full-featured LFO, this just might do the trick for you. The LFO schematic in AS21C really is a three pager, so this is something you'll definitely want a PCB for. To my knowlege, Scott Stites is the only person brave enough to have attempted this circuit on a breadboard (more likely two or more breadboards). Note that you'll need an 8038 function gen chip, LM555 timer, 3080 OTA, TL074 quad op amp, 1458 dual op amp and CD4016 analog switch chips for this board.

The normal selling price for the TH-301 LFO board will be $20, but we have about ten of the Rev01 boards and since they need the tweaks mentioned above, we're selling them for $12 each. Shipping will be $3.50 in North America, and $5.50 to UK/EU/Aus. If you're interested, PayPal funds to <see the thread>. If you need more info, either shout out here, or send us a message at the magsmoke Gmail address.

Again, I have to give a huge THANK YOU to Dave Brown for helping with this. I've got other Magic Smoke projects in the pipeline, we've just reissued two Thomas Henry books (with another on the way), and our day jobs keep John and I hopping, so there is NO way we could have gotten the TH-301 out the door this soon without some extra assistance. Dave was a great help, and as always, has made a nifty web page with some details and o-scope screen shots:
http://modularsynthesis.com/magicsmoke/as21c-lfo/lfo.htm

Other AS21C boards will follow, but I wanted to get the most complicated PCB finished first. I should have a TH-301 "Cucamonga" with a quickie DIY face panel at the AH Nor Cal show on the 25th if you want to come check it out (and you happen to be in northern California).

Cheers!
Tim (happens to be in northern California) Servo"