2 layers88.9 × 50.8 mm
BLDC BIZ CARD
ageppert/Brushless-Motor-Biz-Card
A brushless motor and driver built in to a business card form-factor for learning and experimenting!
82 parts38MIT
2 layers21.6 × 25.4 mm
ByteSizedEncoderDecoder
RCMgames/BSED3Byte Sized Encoder Decoder - Reads 8 quadrature encoders and communicates over I2C (and is qwiic compatible).
- Size
- 21.6 × 25.4 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 17
- Nets
- 30
- Pads
- 88
- Tracks, vias
- 196, 9
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 Apr 2024
- Updated
- 20 Mar 2025
Overview
ByteSizedEncoderDecoder is an open-source printed circuit board by RCMgames, from the RCMgames/BSED repository on GitHub, published under the MIT licence. It is a 2-layer board of 21.6 × 25.4 mm with 17 parts on 30 nets, routed with 196 tracks and 9 vias.
It is built around the ATMEGA328PB-AU and SM04B-SRSS-TB. Its parts include 11 connectors and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA328PB-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 27 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Touch function TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
SM04B-SRSS-TB
Header SR 1.0 SMT side entry, 1mm pitchJSTUncategorised
README
extras/hardware/README.mdHere are the KiCAD and Gerber files for creating the circuit boards this firmware is designed to run on.
You could theoretically run it on a bare ATmega328 chip or another board, but the code is specialized for this board and uses hard-coded pin numbers.
Bill Of Materials
- 1x assembled PCB
- buy assembled PCBs from PCBWay with all the surface mount soldering done for you
- or do your own surface mount soldering:
- circuit board:
- If you buy PCBs from PCBWay through this link PCBWay generously gives me a 10% commission without costing you anything
- https://www.pcbway.com/project/shareproject/ByteSizedEncoderDecoder_v1_1_a5a4bd50.html
- If you buy PCBs with another method (send ./PCB Production/gerbers-ByteSizedEncoderDecoder-v1.1.zip file) here's some info you might need: min track/spacing=6/6mil, min hole size=0.3mm
- If you buy PCBs from PCBWay through this link PCBWay generously gives me a 10% commission without costing you anything
- 2x JST SH https://www.digikey.com/en/products/detail/jst-sales-america-inc/SM04B-SRSS-TB/926710
- 1x ATmega328PB TQFP https://www.digikey.com/en/products/detail/microchip-technology/ATMEGA328PB-AU/5638812
- circuit board:
- 4x 1x08 0.1" female header pins
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1x4 female header pins 0.1" | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J3, J4, J5, J6, J7, J8, J9, J10 |
| 2 | NetTie_2 | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | NT1, NT2 |
| 2 | SM04B-SRSS-TB | parts:JST_SM04B-SRSS-TB_LF__SN_ | J1, J2 |
| 1 | ATMEGA328PB, 32-TQFP | parts:TQFP32_32A_MCH | U1 |
| 1 | ICSP pads (for interfacing with pogo pins) | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J11 |
| 1 | LOGO | LOGO | G*** |
The 15 most common of 17 parts.
Questions
How big is the ByteSizedEncoderDecoder PCB?
It measures 21.6 × 25.4 mm and has 2 copper layers, 1 mm thick.
What parts does the ByteSizedEncoderDecoder use?
17 parts, built around the ATMEGA328PB-AU and SM04B-SRSS-TB. 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 ByteSizedEncoderDecoder KiCad files?
From the RCMgames/BSED repository on GitHub, at the commit this page was made from: the board is extras/hardware/ByteSizedEncoderDecoder.kicad_pcb and its schematic extras/hardware/ByteSizedEncoderDecoder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ByteSizedEncoderDecoder design in my own project?
Its repository publishes it under the MIT 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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