Symm60HE-Daughterboard

Mokeded·Symm60HE·pcb/Symm60HE-Daughterboard.kicad_pcb

Symm60HE-Daughterboard PCB layout, top view — open source board by Mokeded

About the Symm60HE-Daughterboard PCB

Symm60HE-Daughterboard is an open source PCB design by Mokeded, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 50 × 31 mm, with 36 components from 18 distinct parts.

Other key parts include the AT32F405RCT7, USBLC6-2SC6, TLV75733PDBV, XC6206P332MR and SN74AHCT1G125. By type, the board carries 17 capacitors, 6 ICs, 6 resistors, 3 connectors, 2 switches and 1 crystal.

It belongs with the keyboards and sensors designs in this gallery.

From the project

Symmetrical Hall effect Alice keyboard based off of the Doe

Symmetrical Hall effect Alice keyboard based off of the Doe — split into three boards linked by ribbon cable.

GPLv3. Derived from FN40HE; see NOTICE.md for what is taken and from where. The layout is a reconstruction of the DOE 60% by hare works, measured from published photographs — not affiliated with that project.

The GitHub-facing designs/ index groups the project by connection system and physical layout while keeping one canonical copy of every large CAD and fabrication file:

Main components on the Symm60HE-Daughterboard

AT32F405RCT7 USBLC6-2SC6 TLV75733PDBV XC6206P332MR SN74AHCT1G125

Symm60HE-Daughterboard bill of materials (BOM)

36 components, 18 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	AT32F405RCT7 Artery Technology	U4_LQFP-64_10x10mm_P0.5mm	U1
1	USBLC6-2SC6	U1_SOT-23-6	U2
1	TLV75733PDBV	U2_SOT-23-5	U3
1	XC6206P332MR	U3_SOT-23-3	U4
2	SN74AHCT1G125	U2_SOT-23-5	U5, U6
1	12MHz	Y1_Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	TYPE-C-31-M-12	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
2	FFC_12P	FFC_12P_1.00mm_TopContact	J2, J3
1	0.5A	F1_Fuse_0805_2012Metric	F1
2	TS-1187A	SW1_SW_Push_1P1T_XKB_TS-1187A	SW1, SW2
2	10u	C148_C_0603_1608Metric	C1, C8
2	1u	C148_C_0603_1608Metric	C2, C10
2	30p	C1_C_0402_1005Metric	C3, C4
7	100n	C1_C_0402_1005Metric	C5, C6, C7, C9, C11, C16, C17
4	2.2u	C148_C_0603_1608Metric	C12, C13, C14, C15
2	12k	R3_R_0402_1005Metric	R1, R4
2	5.1k	R3_R_0402_1005Metric	R2, R3
2	470R	R3_R_0402_1005Metric	R5, R6

Symm60HE-Daughterboard design files

The KiCad project lives in the Mokeded/Symm60HE repository on GitHub; these links point at the commit this page was built from.

Symm60HE-Daughterboard: common questions

How big is the Symm60HE-Daughterboard PCB?

The Symm60HE-Daughterboard measures 50 × 31 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the Symm60HE-Daughterboard?

36 components, from 18 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Symm60HE-Daughterboard design files?

From the Mokeded/Symm60HE repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Symm60HE-Daughterboard design in my own project?

Yes, under the terms of its GPL-3.0 license, which Mokeded chose for the repository.

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