Encoder panel
FutureSharks·preamp-two·PCBs/encoder-panel/encoder-panel.kicad_pcb
About the Encoder panel PCB
Encoder panel is an open source PCB design by FutureSharks, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 64 × 55 mm, with 39 components from 7 distinct parts.
Other key parts include the ENA1J-B28. By type, the board carries 20 capacitors, 16 diodes, 1 IC, 1 connector and 1 resistor.
It belongs with the displays & leds and audio designs in this gallery.
From the project
An digitally controlled hi fi preamplifier 🔈🎵
The module is the sole human interface to the preamp. It consists of 2 things:
- A high quality optical encoder for changing of the volume and input - A ring of NeoPixels as a visual indicator and to give feedback
Python module is here: code/modules/encoder_panel.py

Main components on the Encoder panel
Encoder panel bill of materials (BOM)
39 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ENA1J-B28 | ENA1J-B28-L00128L | U1 |
| 1 | Conn_01x05 | Molex_KK-254_AE-6410-05A_1x05_P2.54mm_Vertical | J1 |
| 16 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D2, D3, D4, D5, D6, D7, D8 +8 |
| 16 | 0.1uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8 +8 |
| 2 | 1000uF | CP_Elec_8x5.4 | C17, C18 |
| 2 | 1000uF | CP_Radial_D8.0mm_P5.00mm | C19, C20 |
| 1 | 500R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1 |
Encoder panel design files
The KiCad project lives in the FutureSharks/preamp-two repository on GitHub; these links point at the commit this page was built from.
Encoder panel: common questions
How big is the Encoder panel PCB?
The Encoder panel measures 64 × 55 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Encoder panel?
39 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the Encoder panel design files?
From the FutureSharks/preamp-two repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Encoder panel design in my own project?
Yes, under the terms of its GPL-3.0 license, which FutureSharks chose for the repository.
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