Comments on: How-To: Make a digital synthesizer

By: DjFluorescent

DjFluorescent — Fri, 13 Nov 2009 05:33:57 +0000

i totally made one of these today….
i didn’t have a breadboard, so i just went ahead and proceeded to dive right in(not recommended). but alas, IT WORKS!! i’m happy.. thank you for sharing you schematics

By: MC MIC

MC MIC — Sat, 17 Oct 2009 04:38:22 +0000

is there any way i could run this to a computer,
for example usb safely?

By: ilovegreenmonster

ilovegreenmonster — Wed, 16 Sep 2009 20:01:18 +0000

When ordering from Jameco,
part number 690540 appears to be a 47 ohm resistor, not 47kohm resistor.

The correct part seems to be 691260.

If I’m correct, you may want to update the parts list

By: Aro

Aro — Wed, 19 Aug 2009 17:29:09 +0000

Could I use a 7404 hex inverter instead of 40106?

By: ultimatenerd22

ultimatenerd22 — Mon, 13 Jul 2009 23:37:12 +0000

awesome.

By: Kyle

Kyle — Fri, 19 Jun 2009 07:15:32 +0000

I’m new to reading schematics…

At “IC2P” on the wire between connection 3 and the ground of the 7805T voltage regulator, the connections are labeled “14DD” (with a slash through the “4″) and “VSS” (with a slash through the 2nd S). I realize that 1,4,VDD, and VSS are all connections on the hex inverter, but I can’t figure out what the slashes are for or if “DD” is referring to “VDD.”

Hope that wasn’t too difficult to follow… Any explanation?

By: gringus

gringus — Thu, 04 Jun 2009 14:22:37 +0000

hello im from argentine . i want to know a replacement for the mosfet transistor???????
thanks and sorry for my english

By: Mark

Mark — Tue, 10 Mar 2009 22:21:28 +0000

can anybody identify the manufacturer of the breadboard for this project? i know there are hundreds of them out there but we are looking for this one…..

By: DB

DB — Sun, 08 Mar 2009 00:34:14 +0000

This is great. To be honest, this is my first project, but my synth turned out fine. I also added a few push to break switches to chop the sound up a bit.

Thank you very much for the tutorial.

If anyone could point me the direction of a sine, sawtooth or triangle circuit, I’d really appreciate it.

By: PV

PV — Fri, 09 Jan 2009 16:16:04 +0000

I ordered everything that you suggested, followed your directions and got it to work. It’s really fun to work with! Thanks for this resource! I would definitely use others like it in the future.

I intend on using this and other resources I have gathered in a noise act that I am to do for my friends band.

By: mister newbie

mister newbie — Sun, 04 Jan 2009 21:59:36 +0000

THANK YOU very much for including convenient direct links to the parts…as well as all the rest of the info, very much appreciated!

By: ne7

ne7 — Sun, 30 Nov 2008 19:46:40 +0000

amplified speaker is one that has an amplifier built in (a volume knob etc) – i shouldnt think a simple speaker wont have enuff power to be audible from this circuit (or be v. quiet) – hope that helps :)

By: clweeks

clweeks — Fri, 24 Oct 2008 20:08:28 +0000

Can someone suggest an “amplified speaker” because I don’t know enough to know what I want to buy. I see that hooking these circuits up to a the first speaker I found in a box of junk only produces a crackling when the clips are (dis)connecting but when I use an old ear-piece I can hear what I believe is the expected set of tones. I wandered around a Radio Shack but didn’t find anything that seemed likely.

By: squidfanny

squidfanny — Wed, 01 Oct 2008 17:23:01 +0000

Thanks again feller, works great!

I’ve combined the finished piece with a ‘bent ‘alien voice changer’ toy, which amplifies it very nicely…

Quick note though – the final schematic doesn’t correspond with the final photo. According to the photo pins 1 & 2 are connected to 1meg pot (not 100k which the schematic states). I think there may have been a couple more minor differences, but I just experimented on the breadboard until I got it to sound good.

PEACE.

By: Jason

Jason — Fri, 26 Sep 2008 22:55:19 +0000

This works!!!!! THANK YOU SO MUCH. this was my first electronics project and it works beautifully. Great Job on the Tutorial. THANK YOU THANK YOU THANK YOU!