2 layers40 × 27 mm
Sensor board voc temp
adamvirovecz/sensor-board-voc-temp
VOC, Humidity and Temperature Sensor Board
39 parts1MIT
2 layers45.7 × 39.4 mm
AT2XT
cr1901/AT2XT32[Moved to Codeberg] AT to XT Keyboard Protocol Converter firmware + schematic
- Size
- 45.7 × 39.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 18
- Pads
- 62
- Tracks, vias
- 110, 15
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 29 Mar 2015
- Updated
- 23 Mar 2026
Overview
AT2XT is an open-source printed circuit board by cr1901, from the cr1901/AT2XT repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 45.7 × 39.4 mm with 15 parts on 18 nets, routed with 110 tracks and 15 vias.
It is built around the MSP430G2211IPW14, 0603YD225KAT2A and 06033C112KAT2A, with the 0603YC104KAT2A, KCDX-5S-N and TSW-104-14-S-S among its other parts. Its parts include 5 resistors, 4 capacitors, 4 connectors and 2 ICs. It belongs with the keyboards and input boards and the MSP430 boards of this library.
Main components
7
MSP430G2211IPW14
TSSOP-141.8V~3.6V 10 16MHz 2KB FLASH MSP430 TSSOP-14 Microcontrollers (MCU/MPU/SOC) ROHSTexas InstrumentsMicrocontrollers (MCU/MPU/SOC)
0603YD225KAT2A
060316V 2.2uF X5R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSKyocera AVXMultilayer Ceramic Capacitors MLCC - SMD/SMT06033C112KAT2A
06031.1nF 25V X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSKyocera AVXMultilayer Ceramic Capacitors MLCC - SMD/SMT0603YC104KAT2A
0603100nF 16V X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSKyocera AVXMultilayer Ceramic Capacitors MLCC - SMD/SMT
KCDX-5S-N
插件-25℃~+85℃ 2A 5P Brass Female Tin 插件 Circular Connectors & Cable Connectors ROHSKyconCircular Connectors & Cable ConnectorsTSW-104-14-S-S
插件,P=2.54mm-55℃~+125℃ 1 1x4P 2.54mm 2.54mm 2.79mm 4P 8.13mm Black Phosphor bronze Pin Header Through Hole Tin 插件,P=2.54mm Pin Headers ROHSSamtecPin HeadersKMDGX-6S-N
插件-25℃~+80℃ 2A 6P Copper alloy Female Gold 插件 Circular Connectors & Cable Connectors ROHSKyconCircular Connectors & Cable Connectors
README
README.mdAT-to-XT Keyboard Protocol Converter
This repository provides the source, schematics, and Gerber files that converts the AT-keyboard protocol to the XT keyboard protocol.
As of 3-22-2026, development has moved to Codeberg. Please update your remotes. This repository is not currently mirrored.
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 300 | Resistor_SMD:R_0603_1608Metric | R2, R3, R4, R5 |
| 2 | 2.2u | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 1 | 1.1n | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 47k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | AT | at2xt:DIN41524-5-2MP_20.5mmx15.5mm_P7.5mm_P10.0mm_MP10.0mm | J3 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | MCP1700x-330xxMB | Package_TO_SOT_SMD:SOT-89-3 | U1 |
| 1 | MSP430G2211IPW14 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U2 |
| 1 | PS/2 | at2xt:MiniDIN-6-3MP_14.0mmx12.9mm_P2.6mm_P6.8mm_MP6.75mm | J4 |
| 1 | XT | at2xt:DIN41524-5-2MP_20.5mmx15.5mm_P7.5mm_P10.0mm_MP10.0mm | J2 |
Questions
How big is the AT2XT PCB?
It measures 45.7 × 39.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the AT2XT use?
15 parts, built around the MSP430G2211IPW14, 0603YD225KAT2A, 06033C112KAT2A and 0603YC104KAT2A. 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 AT2XT KiCad files?
From the cr1901/AT2XT repository on GitHub, at the commit this page was made from: the board is board/at2xt.kicad_pcb and its schematic board/at2xt.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the AT2XT design in my own project?
Its repository publishes it under the GPL-3.0 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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