Carrier board
About the Carrier board
Carrier board is an open source PCB design by doug7410, published on GitHub under the MIT license. It is a 2-layer board measuring 140 × 100 mm, with 21 components from 10 distinct parts.
By type, the board carries 8 capacitors, 7 resistors, 3 jumpers and 1 transistor.
It belongs with the dev boards & breakouts, displays & leds and audio designs in this gallery.
From the project
Build guide, BOM and hardware for the Now-Playing desk appliance: HUB75 spectrum + touch now-playing display driven by room-mic song recognition
A desk device that listens to the room, figures out what song is playing, and shows it: a HUB75 LED matrix renders a synced spectrum / lyrics visualization, and a 5" touch screen shows the cover, title, artist, progress and a mosaic of what played recently. The whole thing lives in a routed guitar body with three gold knobs and a bat-handle power toggle.
Both boards authenticate to the cloud with one shared device token. The cloud derives all state server-side; the boards render dumb.
Carrier board bill of materials (BOM)
21 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AOD403 | TO-252-3_TabPin2 | Q1 |
| 1 | C1579341 470uF/10V | CP_Radial_D8.0mm_P3.50mm | CB1 |
| 1 | C1622885 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | CB2 |
| 1 | C32713268 ESP 5V | PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | C32713268 PI 5V A | PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | C32713268 PI 5V B | PinHeader_1x02_P2.54mm_Vertical | JP3 |
| 6 | C1620232 10nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6 |
| 1 | 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C3V3 |
| 1 | C1622885 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C7 |
| 7 | C61299 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7 |
Carrier board design files
The KiCad project lives in the doug7410/nowplaying-appliance repository on GitHub; these links point at the commit this page was built from.
Carrier board: common questions
How big is the Carrier board?
The Carrier board measures 140 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Carrier board?
21 components, from 10 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Carrier board design files?
From the doug7410/nowplaying-appliance repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Carrier board design in my own project?
Yes, under the terms of its MIT license, which doug7410 chose for the repository.
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