# Super Simple VCO: What's next **URL:** \ **Category:** DIY STUFF\ **Created:** [March 23, 2020, 2:14pm UTC](https://lookmumnocomputer.discourse.group/t/super-simple-vco-whats-next/428 "2020-03-23T14:14:37Z")\ **Posts on this page:** 1\ **Showing post:** 21
**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\ **Post date:** [May 26, 2020, 10:23am UTC](https://lookmumnocomputer.discourse.group/t/super-simple-vco-whats-next/428/21 "2020-05-26T10:23:31Z")
That’s a standard oscillator circuit with two opamps, one configured as an integrator, the other as a schmitt trigger, and it does what it says on the label and not much more 🙂 It’s the same circuit as this one: > [@DIY Build CEM3340 (?) (Noob Question)](https://lookmumnocomputer.discourse.group/t/diy-build-cem3340-noob-question/1005/19): > > And I built two of these little boards too [https://www.mitchelectronics.co.uk/product/voltage-controlled-oscillator/](https://www.mitchelectronics.co.uk/product/voltage-controlled-oscillator/) And by the look of it, if you swap out the 358 for a 324, you get all the IC into one package. The linked one is modified for more common resistor values (E3 series instead of E24), single supply, and also has buffers on the output, so is a bit nicer (see the linked build document for schematics and a circuit description). There’s also a link to an exponential CV converter in that thread. --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/super-simple-vco-whats-next/428)._