ChainlinkBase
scottbez1·splitflap·electronics/chainlinkBase/chainlinkBase.kicad_pcb
About the ChainlinkBase PCB
ChainlinkBase is an open source PCB design by scottbez1, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 98.4 × 190.5 mm, with 119 components from 30 distinct parts.
Other key parts include the AP7361C-33E, TPL7407L, Buck, TTGO_TDisplay and MCP23017_SS. By type, the board carries 38 resistors, 24 capacitors, 18 ICs, 17 diodes, 15 connectors and 5 fuses.
It belongs with the displays & leds and wearables designs in this gallery.
From the project
DIY split-flap display
This is a DIY ESP32-based split-flap display, optimized for easy assembly at home in small quantities but able to be scaled up to large affordable displays.
The splitflap community Discord server is the best place to keep up with the latest changes or ask questions about the project!
Want to help support development or just say "thanks"? Consider a one-time or monthly sponsorship:

Main components on the ChainlinkBase
ChainlinkBase bill of materials (BOM)
119 components, 30 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP7361C-33E | SOT-223-3_TabPin2 | U101 |
| 1 | TPL7407L | SOIC-16_3.9x9.9mm_P1.27mm_silk | U102 |
| 1 | Buck | BuckModuleBackSilk | U103 |
| 1 | TTGO_TDisplay | T-DISPLAY_extra_pins_labeled | U104 |
| 1 | MCP23017_SS | SSOP-28_5.3x10.2mm_P0.65mm | U105 |
| 2 | SN74LV1T34DBV | SOT-23-5 | U106, U108 |
| 1 | SP485 | SOIC-8_3.9x4.9mm_P1.27mm | U107 |
| 5 | INA219BxD | SOIC-8_3.9x4.9mm_P1.27mm | U201, U301, U401, U501, U601 |
| 5 | VN7007ALH | VN7007ALHTR | U202, U302, U402, U502, U602 |
| 2 | Power In | Generic-5.08-2P | J101, J103 |
| 1 | RELAY | Generic-5.08-2P | J102 |
| 2 | RS485 | Generic-5.08-2P | J104, J105 |
| 1 | Logic Power Out | Generic-5.08-2P | J106 |
| 1 | UART | Generic-5.08-3P | J107 |
| 1 | Conn_02x04_Odd_Even | IDC-Header_2x04_P2.54mm_Vertical | J108 |
| 2 | Conn_01x06_Male | PinHeader_1x06_P2.54mm_Vertical | J111, J112 |
| 5 | CHANNEL | Generic-5.08-2P | J201, J301, J401, J501, J601 |
| 5 | Fuse Holder BK-6013 | BK-6013 | F201, F301, F401, F501, F601 |
| 1 | LEDs | PinHeader_1x03_P2.54mm_Vertical_SolderJumper | JP101 |
| 1 | SW_DIP_x04 | SW_DIP_SPSTx04_Slide_Omron_A6S-410x_W8.9mm_P2.54mm | SW101 |
Show 10 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 6 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D101, D102, D103, D104, D105, D106 |
| 1 | 2A 500mV | D_SOD-128 | D107 |
| 10 | Red | LED_0805_2012Metric_Silkscreen | D201, D202, D301, D302, D401, D402, D501, D502 +2 |
| 2 | 47uF | CP_Elec_6.3x5.4 | C101, C104 |
| 2 | 4.7uF | C_0805_2012Metric | C102, C103 |
| 20 | 0.1uF | C_0805_2012Metric | C105, C106, C107, C108, C109, C110, C111, C112 +12 |
| 7 | 1k | R_0805_2012Metric | R101, R102, R206, R306, R406, R506, R606 |
| 16 | 15k | R_0805_2012Metric | R103, R203, R204, R207, R303, R304, R307, R403 +8 |
| 5 | 0.01R 1% 1W | R_0612_1632Metric | R201, R301, R401, R501, R601 |
| 10 | 2k | R_0805_2012Metric | R202, R205, R302, R305, R402, R405, R502, R505 +2 |
ChainlinkBase design files
The KiCad project lives in the scottbez1/splitflap repository on GitHub; these links point at the commit this page was built from.
ChainlinkBase: common questions
How big is the ChainlinkBase PCB?
The ChainlinkBase measures 98.4 × 190.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the ChainlinkBase?
119 components, from 30 distinct parts. The full bill of materials is listed on this page.
Where can I download the ChainlinkBase design files?
From the scottbez1/splitflap repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the ChainlinkBase design in my own project?
Yes, under the terms of its Apache-2.0 license, which scottbez1 chose for the repository.
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