2 layers48.4 × 21.6 mm
E15
git4dcc/RTB_E15
Universal charlieplexing WS28xx emulator with fixed LED voltage.
26 partsApache-2.0
2 layers79.4 × 21.6 mm
Universal 16 channel WS28xx emulator.
- Size
- 79.4 × 21.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 50
- Pads
- 155
- Tracks, vias
- 254, 20
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 31 Oct 2023
- Updated
- 20 Feb 2026
Overview
E10 is an open-source printed circuit board by git4dcc, from the git4dcc/RTB_E10 repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 79.4 × 21.6 mm with 45 parts on 50 nets, routed with 254 tracks and 20 vias.
It is built around the AVR64DA32-E/PT, MCP6001OB and MIC5205-5.0YM5, with the SS34F among its other parts. Its parts include 22 resistors, 8 connectors, 4 capacitors, 3 ICs and 2 diodes.
Main components
4
AVR64DA32-E/PT
TQFP-32(7x7)-40℃~+125℃ 1.8V~5.5V 10bit 12bit 24MHz 27 512Byte 64KB 8 Bit 8KB AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MCP6001OB
SOT-23-5-3V~-900mV、900mV~3V -40℃~+125℃ 1 1.8V~6V 1MHz 1pA 1pA 2.7uV/℃ 27nV/√Hz@1kHz 3.5mV 70dB 75uA 800V/ms 84mA Rail-to-Rail Input, Rail-to-Rail Output SOT-23-5 Operational Amplifier ROHSGREENMICROOperational AmplifierMIC5205-5.0YM5
SOT-23-5-40℃~+125℃@(Tj) 1 150mA 180mV@(50mA) 20V 2uA 5V 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SS34F
SMAF(DO-214AD)3A 40V 500nA 550mV@3A Independent SMAF(DO-214AD) Schottky Diodes ROHSFUXINSEMISchottky Diodes
README
README.mdRTB_E10
This E10 module implements a 16 channel WS2811 emulator with compatible bus timing. The E10 may be cascaded with regular WS28xx chips. The number of LEDs is auto detected/configured (0-16). Optionally, the common LED voltage can be controlled over the bus as well.
User Guides
- User Guide - DE
- User Guide - EN
<img src=supplemental/images/E10_main.jpg>
The decoder has the following features,
- Protocol
- WS2811 compatible timing
- LED ports
- 0..16 channel output (auto detecting)
- Software selectable common LED voltage (0 .. 5V)
- Push/Pull output and can drive common anode or cathode
- 256 step PWM (240Hz)
- gamma correction (optional)
- firmware update via V24 debug interface
Hardware
My current PCB layout uses SMD footprints with 0.5mm pitch and 0603 parts. Reflow soldering is my recommendation, but with some experience handsoldering is also possible.
The hardware allows either push or pull operation. Currently only the pull operation is implemented in the firmware. Should a usecase for push-operation arise, the firmware could be adapted.
<img src=supplemental/images/E10_top_connect.jpg>
PCB
- 2-layer PCB, FR4, 1.6mm
- CPU: AVR64DA32
- BUS: WS28xx
- LED: Push/Pull
Kicad
Dependency
:yellow_circle: Requires my Kicad project library RTB_SamacSys in the same directory tree.
Firmware
Filename structure: { pcb }{ code }{ version }.hex
Example: E10F0001.hex
| Description | |
|---|---|
| pcb | Name of matching hardware (E10) |
| code | Type of code contained (R=rom, B=bootloader, F=flash, U=bld update, P=UPDI factory code) |
| version | Release version (####) |
UPDI
The fuse settings as well as the P-code (E10Pxxxx.hex) has to be installed by using UPDI.
Details
<img src=supplemental/images/E10_updi.jpg>
| Fuse Setting | P-Code Install |
|---|---|
| <img src=supplemental/images/E10_updi_fuses.jpg width=500> | <img src=supplemental/images/E10_updi_memory.jpg width=500> |
Debug Interface
Subsequent code updates can be done via the built-in serial debug interface.
Details
-
connect the serial cable (1Mb, 8N1, RTS/CTS)
-
press 'break' within the VT100 terminal to bump the module to console prompt
-
upload the firmware file (E10Fxxxx.hex)
-
for more details, refer to the 'User Guide'
<img src=supplemental/images/E10_debugIF.jpg>
Software
The LED common voltage must be sent as the first byte (virtual LED) over the bus followed by the intensity values for the individual LEDs.
Byte order: {voltage} {led_0} ... {led_n} //'n' being the number of configured LEDs
Led Voltage: 5V * {voltage} / 255Images
<img src=supplemental/images/E10_samples.jpg width=260> <img src=supplemental/images/E10_usecase.jpg width=265>
This project is intended for hobby use only and is distributed in accordance with the Apache License 2.0 agreement.
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 220 | Resistor_SMD:R_0603_1608Metric | R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H1, H2, H3, H4 |
| 2 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C3 |
| 2 | 160 | Resistor_SMD:R_0603_1608Metric | R18, R19 |
| 2 | 4.7u/10V | Capacitor_SMD:C_0805_2012Metric | C1, C4 |
| 2 | 47k | Resistor_SMD:R_0603_1608Metric | R24, R25 |
| 1 | 22 | Resistor_SMD:R_0603_1608Metric | R23 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | AVR-64da32 | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mm | U1 |
| 1 | Debug | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J5 |
| 1 | HBT(green) | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | LED 0-7 | RTB_parts:1725711 | J7 |
| 1 | LED 8-15 | RTB_parts:1725711 | J1 |
| 1 | LED Common | RTB_parts:1725656 | J8 |
| 1 | LED common | RTB_parts:1725656 | J6 |
| 1 | MCP6001 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | MIC5205-5.0YM5 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | SS34F | Diode_SMD:D_SOD-123F | D1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | UPDI | Connector_PinHeader_1.27mm:PinHeader_2x03_P1.27mm_Vertical | J4 |
| 1 | WS-bus input | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | WS-bus output | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
Questions
How big is the E10 PCB?
It measures 79.4 × 21.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the E10 use?
45 parts, built around the AVR64DA32-E/PT, MCP6001OB, MIC5205-5.0YM5 and SS34F. 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.
Where can I download the E10 KiCad files?
From the git4dcc/RTB_E10 repository on GitHub, at the commit this page was made from: the board is E10.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the E10 design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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