Plain60 Flex Edition rev2.2

This universal 60% PCB is designed to support as little layouts as possible without limiting usability for most users. The reason I did this is because other PCBs made for this form factor usually have so many supported layouts that it could almost qualify as swiss cheese.

It also features a fuse and an ESD protection chip to protect the MCU and other parts of the PCB.

Features

• Fits in the TGR Unikorn
• Compatible with QMK Firmware and VIA Configurator (if you flash a VIA compatible .hex file)
• Compatible with most universal 60% cases and HHKB/WKL Tofu by KBDfans
• USB type-C
• Optional JST header for connection with daughterboard
• Footprint for optional speaker (AST1109MLTRQ)
• ESD protection and fuse
• No LEDs and no underglow
• Minimal layout support
• ISP header

Supported layouts

Building

If you feel like building a few of these PCBs yourself, go to the 'Releases' tab and download the latest gerber files. Order those at your favourite PCB manufacturer, get the components needed (see below) and solder them on! A hot air station is not required but a soldering iron is. Flux is recommended.

Opening the project

To open the files you will need the latest KiCAD nightly version.

Bill of materials (BOM)

Amount is per PCB, multiply as needed.

LCSC part #	Description	Value	Package	Amount
C128353	Capacitor	0.1uF	0805	4
C131056	Capacitor	4.7uF	0805	1
C215803	Capacitor	1uF	0805	1
C109001	Diode		0805	65
C261942	Fuse		0805	1
C165948	Connector		SMD/THT	1
C103904	Resistor	10K	0805	2
C212411	Resistor	5.1K	0805	2
C325772	Resistor	22	0805	2
C44854	MCU	32U4	QFP-44	1
C7519	ESD chip		SOT23-6	1
C341521	Resonator	16MHz	SMD	1
C92584	Switch		SMD	1
C160404	Optional JST		SMD	1