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2 layers26.8 × 10 mmPpk, the printed circuit board in 3D

Ppk

wojtekka/ppk1

Palm™ Portable Keyboard USB adapter

Open in PCBKitView on GitHub.kicad_pcb
Size
26.8 × 10 mm
Copper layers
2
Thickness
1.6 mm
Parts
13
Nets
19
Pads
52
Tracks, vias
125, 9
Pours
1
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
11 Oct 2024
Updated
16 Sep 2025

Overview

Ppk is an open-source printed circuit board by wojtekka, from the wojtekka/ppk repository on GitHub. It is a 2-layer board of 26.8 × 10 mm with 13 parts on 19 nets, routed with 125 tracks and 9 vias.

It is built around the CH552E and SN74LVC1G00DBV. Its parts include 3 resistors, 2 capacitors, 2 ICs and 1 connector. It belongs with the keyboards and input and interfaces and adapters boards and the 8051 (CH55x, STC, AT89) boards of this library.

Main components

2

README

README.md

Palm™ Portable Keyboard USB adapter

Based on CH552 Macropad mini by Stefan Wagner (https://github.com/wagiminator/CH552-Macropad-mini). Headers from the original code:

text
// ===================================================================================
// Project:   MacroPad Mini for CH551, CH552 and CH554
// Version:   v1.3
// Year:      2023
// Author:    Stefan Wagner
// Github:    https://github.com/wagiminator
// EasyEDA:   https://easyeda.com/wagiminator
// License:   http://creativecommons.org/licenses/by-sa/3.0/
// ===================================================================================

# Project:   chprog - Programming Tool for CH55x Microcontrollers
# Version:   v1.1
# Year:      2022
# Author:    Stefan Wagner
# Github:    https://github.com/wagiminator
# License:   MIT License

Based on Gist by Mightypork (https://gist.github.com/MightyPork/6da26e382a7ad91b5496ee55fdc73db2)

Key mapping compatible with https://github.com/pymo/ppk_bluetooth/

Hardware design released into public domain.

Parts

13
QtyValueFootprintReferences
25k1Resistor_SMD:R_0805_2012MetricR2, R3
1100kResistor_SMD:R_0805_2012MetricR4
1100nCapacitor_SMD:C_0805_2012MetricC3
110uCapacitor_SMD:C_0805_2012MetricC4
1CH552EPackage_SO:MSOP-10_3x3mm_P0.5mmU3
1DCDTestPoint:TestPoint_Pad_1.5x1.5mmTP1
1GNDTestPoint:TestPoint_Pad_1.5x1.5mmTP5
1RTSTestPoint:TestPoint_Pad_1.5x1.5mmTP2
1RXDTestPoint:TestPoint_Pad_1.5x1.5mmTP3
1SN74LVC1G00DBVPackage_TO_SOT_SMD:SOT-23-5U1
1USB_C_Receptacle_USB2.0_16PConnector_USB:USB_C_Receptacle_GCT_USB4110J1
1VCCTestPoint:TestPoint_Pad_1.5x1.5mmTP4

Questions

How big is the Ppk PCB?

It measures 26.8 × 10 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Ppk use?

13 parts, built around the CH552E and SN74LVC1G00DBV. 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 Ppk KiCad files?

From the wojtekka/ppk repository on GitHub, at the commit this page was made from: the board is hardware/ppk.kicad_pcb and its schematic hardware/ppk.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Ppk design in my own project?

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

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