2 layers200 × 100 mm
Regalodilara
valerionew/very-good-uc-doggos
A special graduation present for a special friend. Six microcontrollers in one devboard
91 parts50
2 layers24 × 15.5 mm
Ky040abs
GusHMeza/ky040absTurn a KY040 incremental encoder to an absolute encoder with a 1 wire interface.
- Size
- 24 × 15.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 7
- Pads
- 26
- Tracks, vias
- 34, 3
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 Sep 2024
- Updated
- 12 Jan 2026
Overview
Ky040abs is an open-source printed circuit board by GusHMeza, from the GusHMeza/ky040abs repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 24 × 15.5 mm with 8 parts on 7 nets, routed with 34 tracks and 3 vias.
It is built around the ATTINY10-TSH. Its parts include 3 resistors, 1 capacitor, 1 IC, 1 diode and 1 connector. It belongs with the interfaces and adapters boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdky040abs
Turn a KY040 incremental encoder to an absolute encoder with a 1 wire interface. The KiCAD project is provided for the adapter board.
IMPORTANT: Use avrboy by kimio-kosaka to program the ATTINY10 chip before soldering it to this adapter module. The PCB does not have a TPI interface connector.
HOW TO USE
- Flash an ATTINY10 chip with the provided script.
- Use the suggested connector in the BOM or solder wires to the power inputs and the signal wire.
- Power the module.
- The SIG wire works as an active HIGH input, when it receives a HIGH pulse, it switches to an active HIGH output. I.e. use an I/O pin from a MCU to pulse the SIG wire, then read how many pulses the ky040abs answers with.
- To adjust the resolution (given you have a gear ratio between the encoder and and a spinning shaft), modify the angulo_en_pulsos variable.
- The provided code shows a bidirectional rotation reading, where the ATTINY10 starts at 15 counts that either increment up to 30 or decrement down to 0 depending on the direction of rotation.
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 2kR | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | .1uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | ATtiny10-TS | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | Conn_01x03_Pin | Connector_JST:JST_PH_S3B-PH-K_1x03_P2.00mm_Horizontal | J1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | SW1 |
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Questions
How big is the Ky040abs PCB?
It measures 24 × 15.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ky040abs use?
8 parts, built around the ATTINY10-TSH. 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 Ky040abs KiCad files?
From the GusHMeza/ky040abs repository on GitHub, at the commit this page was made from: the board is KY040-ABS/KY040-ABS.kicad_pcb and its schematic KY040-ABS/KY040-ABS.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ky040abs 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).