Multiplexer-8
About the Multiplexer-8 PCB
Multiplexer-8 is an open source PCB design by polykit, published on GitHub. It is a 2-layer board measuring 44 × 102 mm, with 23 components from 13 distinct parts.
Other key parts include the 4066, L78L05 and L79L05. By type, the board carries 8 capacitors, 6 ICs, 5 connectors, 2 inductors and 2 resistors.
From the project
16 to 8 channel multiplexer to select waveforms in a polysynth
This repository contains schematics and PCB layout of a 2x8 to 8 channel multiplexer. It can be used to switch between different waveforms of a polyphonic oscillator. It is based on four 4066 bilateral switches and can handle a 10Vpp signal. It is powered by +-12V Eurorack style power supply.
https://www.ti.com/lit/ds/symlink/cd4066b.pdf
Main components on the Multiplexer-8
Multiplexer-8 bill of materials (BOM)
23 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 4066 | DIP-14_W7.62mm_Socket_LongPads | U1, U4, U5, U6 |
| 1 | L78L05 | TO-92_Inline_Wide | U2 |
| 1 | L79L05 | TO-92_Inline_Wide | U3 |
| 1 | IN_A | IDC-Header_2x08_P2.54mm_Vertical | J1 |
| 1 | IN_B | IDC-Header_2x08_P2.54mm_Vertical | J2 |
| 1 | SELECT | Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J3 |
| 1 | OUT | IDC-Header_2x08_P2.54mm_Vertical | J4 |
| 1 | POWER | IDC-Header_2x05_P2.54mm_Vertical | J5 |
| 2 | Ferrite_Bead | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | FB1, FB2 |
| 4 | 100n | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C6, C7, C8 |
| 2 | 10u | CP_Radial_D5.0mm_P2.50mm | C2, C3 |
| 2 | 1u | CP_Radial_D5.0mm_P2.50mm | C4, C5 |
| 2 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
Multiplexer-8 design files
The KiCad project lives in the polykit/multiplexer-8 repository on GitHub; these links point at the commit this page was built from.
- Layoutmultiplexer-8.kicad_pcb
Multiplexer-8: common questions
How big is the Multiplexer-8 PCB?
The Multiplexer-8 measures 44 × 102 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Multiplexer-8?
23 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the Multiplexer-8 design files?
From the polykit/multiplexer-8 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Multiplexer-8 design in my own project?
The repository has no license, so all rights stay with polykit. Use it as a reference, and ask the author before reusing the design.