# Roland TR-808 Bass Drum Breadboard Project **URL:** \ **Category:** projects\ **Created:** [June 6, 2017, 7:49pm UTC](https://forum.fritzing.org/t/roland-tr-808-bass-drum-breadboard-project/3905 "2017-06-06T19:49:23Z")\ **Posts on this page:** 1\ **Showing post:** 23
**Author:** ![NoodleDriver](https://forum.fritzing.org/user_avatar/forum.fritzing.org/noodledriver/32/4934_2.png) [@NoodleDriver](https://forum.fritzing.org/u/NoodleDriver)\ **Post date:** [June 11, 2017, 2:57pm UTC](https://forum.fritzing.org/t/roland-tr-808-bass-drum-breadboard-project/3905/23 "2017-06-11T14:57:17Z")
Hi J303 If you fancy building your own split supply you can take a look at this (I’ve designed this layout and built it. I use it for my modular synth): :[12V Rack Power\_1.02.fzz](https://forum.fritzing.org/uploads/default/original/2X/c/c340fd14d77cc8dfd393743ffadff86b14ad918d.fzz) (55.9 KB) It is based on the MFOS project here: [http://musicfromouterspace.com/analogsynth\_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php](http://musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php) There’s also some nice schematics on Hexinverters site of all the 909 drums and a few 808 voices too. [http://www.hexinverter.net/neinohnein-kick/](http://www.hexinverter.net/neinohnein-kick/) You might also find these parts useful: > [@Creating parts with movable schematic elements](http://forum.fritzing.org/t/creating-parts-with-movable-schematic-elements/2121/36): > > [1P4T Switch.fzpz](https://forum.fritzing.org/uploads/default/original/2X/5/5c72582870d5abbdad720f1cced4d4ac0b534eec.fzpz) (5.1 KB) [CA3046.fzpz](https://forum.fritzing.org/uploads/default/original/2X/f/f7c3d76d60f28a731bf0dc745b6e269723df5abb.fzpz) (6.6 KB) [CA3080.fzpz](https://forum.fritzing.org/uploads/default/original/2X/7/75464f4768d512d915ae11f310e295ccb65889d3.fzpz) (5.7 KB) [LT44 Transformer.fzpz](https://forum.fritzing.org/uploads/default/original/2X/2/2c163f011205484703dff3fc92830e179480e0cc.fzpz) (5.7 KB) [MPF102.fzpz](https://forum.fritzing.org/uploads/default/original/2X/9/9244c877b83f2a417ddc81545fb6e7469ad202f2.fzpz) (5.5 KB) [OTA.fzpz](https://forum.fritzing.org/uploads/default/original/2X/d/d4128a7da89c4f84d76eb51511865f8681118876.fzpz) (9.0 KB) [TL072.fzpz](https://forum.fritzing.org/uploads/default/original/2X/8/855a8b395001493c18ee9b8173357bcef8f8b50e.fzpz) (13.3 KB) [CD4066.fzpz](https://forum.fritzing.org/uploads/default/original/2X/1/196219972183d6b32b9ef4d3101ea3c7972efe57.fzpz) (198.8 KB) [TL074 Quad Opamp (Movable).fzpz](https://forum.fritzing.org/uploads/default/original/2X/1/1f1b4fd29285fb9d53a2a997e6c145f773f546a4.fzpz) (8.9 KB) Some of these are slightly messy looking but they all work! I have tested all\* of these on my own PCB projects… \*I have not tested the 3080 yet TBH but it looks perfect. edit: The 3080 works like a charm smiley More parts to follow below… RE: spilt power: You can make a battery powered split supply. Here’s a guide on how to do it: [![](https://musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/dual%20supply%20concept.gif) ](https://musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/dual%20supply%20concept.gif) > **[Music From Outer Space Your Synth-DIY Headquarters](https://musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&PROJARG=ELECTRONICS%2Ftwoninevoltbatteries.html&VPW=1526&VPH=591)** > > Music From Outer Space is your synth-diy headquarters. Analog synthesizer plans and schematics. Good luck, Kevin. --- _[View the full topic](https://forum.fritzing.org/t/roland-tr-808-bass-drum-breadboard-project/3905)._