VU-Switch
About the VU-Switch PCB
VU-Switch is an open source PCB design by tebl, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 99.1 × 61.6 mm, with 29 components from 21 distinct parts.
Other key parts include the LM7805_TO220 and VU_Module. By type, the board carries 13 connectors, 5 modules, 4 relays, 3 capacitors, 2 diodes and 1 IC.
It belongs with the audio designs in this gallery.
From the project
Building an audio input switcher, four 3.5mm audio inputs and one 3.5mm audio output for connecting to my 80s Boombox. VU-meters added, because they're cool!
The first part of this project is therefore the passive audio switch, it allows up to four 3.5mm audio inputs that are switched to one output using relays. The PCB designed for it is the main part of this part, in addition to the documentation needed to actually build the complete unit.
The final part was the VU meter driver board and parts, those I'm using without any modification as the kit I bought on AliExpress (also available on Banggood and ebay) so far seems to work as intended. Just search for 2 Pcs VU Meter Warm Backlight Recording Audio Level Amp With Driver Module, or any…
Main components on the VU-Switch
VU-Switch bill of materials (BOM)
29 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM7805_TO220 | TO-220-3_Vertical | U1 |
| 1 | VU_Module | VU_Driver_Board_5.0 | A1 |
| 4 | Mounting_pin | M3 | M1, M2, M3, M4 |
| 1 | DC_12V | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J1 |
| 3 | VU_12V | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2, J10, J13 |
| 1 | SELECT | JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J3 |
| 1 | INPUT4 | Tayda_3.5mm_stereo_TRS_jack_A-853 | J4 |
| 1 | INPUT3 | Tayda_3.5mm_stereo_TRS_jack_A-853 | J5 |
| 1 | INPUT2 | Tayda_3.5mm_stereo_TRS_jack_A-853 | J6 |
| 1 | INPUT1 | Tayda_3.5mm_stereo_TRS_jack_A-853 | J7 |
| 1 | OUTPUT | Tayda_3.5mm_stereo_TRS_jack_A-853 | J8 |
| 1 | VU_OUT | JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J9 |
| 1 | LED | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J11 |
| 1 | VU_5V | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J12 |
| 4 | HK19F-DC | HK19F-DC | K1, K2, K3, K4 |
| 1 | 1n4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 1n4001 | D_DO-41_SOD81_P10.16mm_Horizontal | D2 |
| 1 | 2200uF | CP_Radial_D13.0mm_P5.00mm | C1 |
| 1 | 100uF | CP_Radial_D6.3mm_P2.50mm | C2 |
| 1 | 100nF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C3 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
VU-Switch design files
The KiCad project lives in the tebl/VU-Switch repository on GitHub; these links point at the commit this page was built from.
VU-Switch: common questions
How big is the VU-Switch PCB?
The VU-Switch measures 99.1 × 61.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the VU-Switch?
29 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the VU-Switch design files?
From the tebl/VU-Switch repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the VU-Switch design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which tebl chose for the repository.
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