
Electro maticv
jothebuzzyard/echo-matic-clone
A repo for kicad files for an eletro-matic tape-delay clone

design and build of my own four-channel audio mixer.
Audio mixer is an open-source printed circuit board by xfbs, from the xfbs/audio-mixer repository on GitHub. It is a 2-layer board of 100 × 100 mm with 22 parts on 54 nets.
It is built around the MC33174D, 10118193-0001LF and SJ1-3523N. Its parts include 6 capacitors, 3 ICs, 2 connectors and 1 inductor. It belongs with the audio and music boards of this library.
This is me documenting the design and building of my desk four-channel audio mixer. You can use this to replicate my results or learn from my mistakes, but keep in mind that I have no formal training in EE.
The file doc.tex contains my writeup of the project. You may want to build
this with LaTeX to generate a PDF.
The folder datasheets/ contains datasheets of all the parts discussed in my
writeup for reference.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k LOG | parts:EVJYK6 | RV1, RV2, RV3, RV4, RV5, RV6 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | MC33174 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2, U3, U4 |
| 2 | 100n | Capacitor_SMD:C_0805_2012Metric | C5, C24 |
| 2 | 1µ | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 4.7µ | Capacitor_SMD:CP_Elec_4x5.4 | C1, C2 |
| 1 | 10118193-0001LF | 10118193-0001LF:FCI_10118193-0001LF | J2 |
| 1 | 6.8µ | Inductor_SMD:L_1210_3225Metric | L1 |
| 1 | SJ1-3523N | parts:Headphone_Jack_3.5mm_SJ1-3523N | J4 |

jothebuzzyard/echo-matic-clone
A repo for kicad files for an eletro-matic tape-delay clone

electrified/rc2014-ym2149
KiCad schematics and gerbers for a YM sound card for the RC2014. See it in action here: https://www.youtube.com/watch?v=-iLwi9FagFE


electrified/rc2014-ym2151
Yamaha's DX21, DX27 and DX100 synthesisers used a derivative IC which is very similar.

dennowiggle/Retro-PETER
3.3V Retro computer project => FPGA + RCBUS + CPU boards making a custom system.


FugLong/OpenChord
An open-source music device for portable, expressive, and extensible audio creation.

It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
22 parts, built around the MC33174D, 10118193-0001LF and SJ1-3523N. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the xfbs/audio-mixer repository on GitHub, at the commit this page was made from: the board is audio-mixer/audio-mixer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask xfbs before reusing the design.