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2 layers68.8 × 48.6 mmMSS Crossover Tiny, the printed circuit board in 3D

An MSS Crossover Node

Size
68.8 × 48.6 mm
Copper layers
2
Thickness
1.6 mm
Parts
36
Nets
28
Pads
105
Tracks, vias
157, 31
Pours
3
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
25 Feb 2025
Updated
6 Sep 2025

Overview

MSS Crossover Tiny is an open-source printed circuit board by dabridgham, from the dabridgham/MSS-Crossover-Tiny repository on GitHub. It is a 2-layer board of 68.8 × 48.6 mm with 36 parts on 28 nets, routed with 157 tracks and 31 vias.

It is built around the ATTINY25-20SSU, INA180A1IDBVR(LX) and TLP187, with the AMS1117-3.3, CL21B104KBCNNNC and MJ3221-88-0 among its other parts. Its parts include 7 connectors, 6 capacitors, 5 resistors, 5 ICs and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

11

Parts

36
QtyValueFootprintReferences
4Screw_Terminal_01x02Imports:CUI_TB003-500-P02BEJ3, J4, J5, J7
3100nFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC5, C6, C7
32.2kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR2, R4, R7
2MSS 7Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mmJP1, JP2
2RJ45myMods:MJ3221-88J1, J2
2TLP187Package_SO:SOIC-4_4.55x3.7mm_P2.54mmU1, U4
1.33µFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC2
10.1ΩResistor_SMD:R_2512_6332MetricR8
1100µFCapacitor_SMD:CP_Elec_6.3x7.7C1
122 µFCapacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_HandSolderC4
14.7kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR5
1AMS1117-3.3Package_TO_SOT_SMD:SOT-223-3_TabPin2U2
1ATtiny25-20SSPackage_SO:SOIC-8_3.9x4.9mm_P1.27mmU3
1DF04SDiode_SMD:Diode_Bridge_Vishay_DFSD1
1GNDTestPoint:TestPoint_THTPad_1.5x1.5mm_Drill0.7mmTP1
1INA180A3Package_TO_SOT_SMD:SOT-23-5U5
1ISP (3V3)Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_VerticalJ6
1LOGOmyMods:Free-moNH-20G***
1SetButton_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2SW1
1V+TestPoint:TestPoint_THTPad_1.5x1.5mm_Drill0.7mmTP3
1detTestPoint:TestPoint_THTPad_1.5x1.5mm_Drill0.7mmTP2
1redLED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolderD2

The 32 most common of 36 parts.

Questions

How big is the MSS Crossover Tiny PCB?

It measures 68.8 × 48.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the MSS Crossover Tiny use?

36 parts, built around the ATTINY25-20SSU, INA180A1IDBVR(LX), TLP187 and AMS1117-3.3. 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 MSS Crossover Tiny KiCad files?

From the dabridgham/MSS-Crossover-Tiny repository on GitHub, at the commit this page was made from: the board is mss-crossover-tiny.kicad_pcb and its schematic mss-crossover-tiny.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the MSS Crossover Tiny design in my own project?

Its repository states no licence, so its author keeps all rights: ask dabridgham before reusing the design.

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