2 layers100 × 100 mm
2 layers85 × 45 mm
A8 garaj extenter
phateks/pcb_KinconyA8_IOExtenderio extender for kincony a8_v1.6
- Size
- 85 × 45 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 54
- Pads
- 179
- Tracks, vias
- 359, 61
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 14 Nov 2025
- Updated
- 17 Nov 2025
Overview
A8 garaj extenter is an open-source printed circuit board by phateks, from the phateks/pcb_KinconyA8_IOExtender repository on GitHub. It is a 2-layer board of 85 × 45 mm with 49 parts on 54 nets, routed with 359 tracks and 61 vias.
It is built around the TSR 2-2450N and TCMT1100. Its parts include 28 resistors, 15 ICs, 4 connectors and 1 capacitor.
Main components
2
TSR 2-2450N
SIP-3,14x7.6m-40℃~+90℃ 1 10.2mm 14mm 1mA 2A 50mVp-p 5V 6.5V~36V 7.6mm 820uF 850kHz 93% Plastic encapsulated type Short Circuit Protection、Over Current Protection、Under Voltage Protection、Automatic fault recovery Step-down type ±2% SIP-3,14x7.6m DC-DC Power Modules ROHSTRACO POWERDC-DC Power Modules
TCMT1100
SOP-4-1.27mm-40℃~+100℃ 1 1.35V 3.75kV 300mV@1mA,10mA 5.5us@2mA,100Ω 50% 50mA 600% 60mA 6V 70V 7us DC Phototransistor SOP-4-1.27mm Transistor, Photovoltaic Output Optoisolators ROHSVishay IntertechnologyTransistor, Photovoltaic Output Optoisolators
README
README.mdKincony A8 - 14 Inputs Extender
NOTE: The address of the MCP is fixed to 0x20
BOM is not created in the files
3v3 - TSR2-2433N - TracoPower
For TCMT1100 Anod connection i used 1.8K Ohm with 12VDC input - 0805
For TCMT1100 Emitter connection i used 4.7K Ohm for pullup on 3v3. - 0805
Capacitor 100nF - 1026
2 x Connector 1x7 - 1823683 - PhoenixContact
NOTE: There are no I2C resistors on the board, if this is used for somethig else they must be placed somewhere else if needed
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23 +12 |
| 14 | TCMT1100 | ìoextender:opto_tcmt1100 | IC1, IC2, IC3, IC4, IC5, IC6, IC7, IC8, IC9, IC10, IC11, IC12, IC13, IC14 |
| 2 | 1823683 | ìoextender:1823683 | J2, J3 |
| 1 | C | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | Conn_01x04 | Connector_JST:JST_XA_B04B-XASK-1_1x04_P2.50mm_Vertical | J1 |
| 1 | MCP23017_SO | Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm | U1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type059_RT06302HBWC_1x02_P3.50mm_Horizontal | J4 |
| 1 | TSR_2-2450N | ìoextender:TSR22450N | PS1 |
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Questions
How big is the A8 garaj extenter PCB?
It measures 85 × 45 mm and has 2 copper layers, 1.6 mm thick.
What parts does the A8 garaj extenter use?
49 parts, built around the TSR 2-2450N and TCMT1100. 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 A8 garaj extenter KiCad files?
From the phateks/pcb_KinconyA8_IOExtender repository on GitHub, at the commit this page was made from: the board is a8_garaj_extenter.kicad_pcb and its schematic a8_garaj_extenter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the A8 garaj extenter design in my own project?
Its repository states no licence, so its author keeps all rights: ask phateks before reusing the design.