2 layers

C test

Copper layers: 2
Thickness: 1.6 mm
Parts: 18
Nets: 26
Pads: 90
Tracks, vias: 0, 0
Routed: Not yet
KiCad: KiCad 10.0 (file 20260206)
Created: 5 Jul 2023
Updated: 27 Oct 2026

Overview

C test is an open-source printed circuit board by McbeEringi, from the McbeEringi/pcb-stuff repository on GitHub, published under the MIT licence. It is a 2-layer board with 18 parts on 26 nets.

It is built around the ATTINY402-SSN and AP7375-33Y. Its parts include 7 resistors, 4 ICs, 3 connectors, 2 capacitors and 1 switch. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

Parts

Qty	Value	Footprint	References
3	47k	Resistor_SMD:R_0603_1608Metric	R1, R4, R5
2	10k	Resistor_SMD:R_0603_1608Metric	R2, R3
1	10k	Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical	RV1
1	1u	Capacitor_SMD:C_0603_1608Metric	C1
1	4u7	Capacitor_SMD:C_0603_1608Metric	C2
1	56k	Resistor_SMD:R_0603_1608Metric	R6
1	8m	Resistor_SMD:R_0805_2012Metric	R7
1	AP7375-33	Package_TO_SOT_SMD:SOT-23-3	U1
1	ATtiny402-SS	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U3
1	Conn_01x03	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J2
1	INA181	Package_TO_SOT_SMD:SOT-23-6	U4
1	MCP6L91T-EOT	Package_TO_SOT_SMD:SOT-23-5	U2
1	SW_Push	Library:alps-skr[gp]	SW1
1	USB_C_Plug	Library:USB_C_PLUG_00402-UCAM001-X	P1
1	USB_C_Receptacle_USB2.0_16P	Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	J1

Questions

What parts does the C test use?

18 parts, built around the ATTINY402-SSN and AP7375-33Y. 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 C test KiCad files?

From the McbeEringi/pcb-stuff repository on GitHub, at the commit this page was made from: the board is proj/usb/c-test/c-test.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the C test design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

AVR (ATmega, ATtiny)

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/mcbeeringi-pcb-stuff-c-test" title="C test in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/mcbeeringi-pcb-stuff-c-test.jpg" alt="C test" width="1200" height="900">

A picture that opens the board, for a README

[![C test](https://pcbkit.io/embed/boards/mcbeeringi-pcb-stuff-c-test.jpg?size=s)](https://pcbkit.io/boards/mcbeeringi-pcb-stuff-c-test)

Source

Repository: McbeEringi/pcb-stuff
Board file: proj/usb/c-test/c-test.kicad_pcb
Commit: 8b52ee5
Licence: MIT

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