2 layers55 × 26.5 mm Prog tool, the printed circuit board in 3D

Prog tool

Documentation | Source | Join us on Matrix!

Size: 55 × 26.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 70
Nets: 83
Pads: 270
Tracks, vias: 638, 81
Pours: 1
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 24 Oct 2024
Updated: 8 Oct 2026

Overview

Prog tool is an open-source printed circuit board by linuxboot, from the linuxboot/flashkeeper repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 55 × 26.5 mm with 70 parts on 83 nets, routed with 638 tracks and 81 vias.

It is built around the FT2232HL, LD1117 and TXS0108EPW, with the SL34 among its other parts. Its parts include 26 resistors, 22 capacitors, 5 ICs, 5 diodes and 4 connectors.

Main components

README

README.md

Flashkeeper

Manage and Protect your SPI Flash Chip!

Documentation | Source | Join us on Matrix!

A Flashkeeper WP provides a write-protection control switch on top of a SOIC-8 flash chip

Flashkeeper is a family of open-hardware add-ons for standard SOIC-8 and WSON-8 SPI NOR flash chips (as are commonly used for firmware storage in PCs and other electronics), providing functionality for write-protection control, SPI bus breakout, flash device emulation, reprogramming, and state validation.

Flashkeeper development takes place on the 15h.org Git forge, and is mirrored to Github as a backup. If you wish to participate in Flashkeeper development on 15h.org infrastructure, please request an account in either the Flashkeeper room or the 15h.org room on Matrix. Issues may be opened on either 15h.org or Github.

For user information, please see the documentation. For hardware source files, see hw/.

The Flashkeeper project is supported by NLnet NGI Zero Core.

Parts

Qty	Value	Footprint	References
15	0.1uF	Capacitor_SMD:C_0603_1608Metric	C2, C3, C4, C5, C6, C7, C8, C9, C10, C12, C13, C15, C18, C19, C21
6	100	Resistor_SMD:R_0603_1608Metric	R2, R3, R12, R13, R21, R22
4	0	Resistor_SMD:R_0603_1608Metric	R14, R15, R16, R17
4	LED	LED_SMD:LED_0603_1608Metric	D1, D2, D3, D4
3	10k	Resistor_SMD:R_0603_1608Metric	R8, R9, R10
2	1.0K	Resistor_SMD:R_0603_1608Metric	R1, R24
2	2.2k	Resistor_SMD:R_0603_1608Metric	R6, R11
2	27pF	Capacitor_SMD:C_0603_1608Metric	C16, C17
2	4.7uF	Capacitor_SMD:C_0603_1608Metric	C1, C11
2	5.1k	Resistor_SMD:R_0603_1608Metric	R18, R19
2	500ohm 500mA	Inductor_SMD:L_0603_1608Metric	L1, L2
1	1-2328702-0	flashkeeper:TE_1-2328702-0	J1
1	10nF	Capacitor_SMD:C_0603_1608Metric	C20
1	10uF	Capacitor_SMD:C_0603_1608Metric	C22
1	120	Resistor_SMD:R_0603_1608Metric	R27
1	12MHz	Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	12k 1%	Resistor_SMD:R_0603_1608Metric	R7
1	160	Resistor_SMD:R_0603_1608Metric	R26
1	1V8	TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm	TP2
1	200	Resistor_SMD:R_0603_1608Metric	R28
1	3.3uF	Capacitor_SMD:C_0603_1608Metric	C14
1	3V3	TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm	TP3
1	3Way	flashkeeper:ThreeWayJumper	J2
1	4.7k	Resistor_SMD:R_0603_1608Metric	R23
1	470	Resistor_SMD:R_0603_1608Metric	R25
1	93LCxxC	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U3
1	Breakout	Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical	J4
1	DNP	Resistor_SMD:R_0603_1608Metric	R20
1	FT2232HL	Package_QFP:LQFP-64_10x10mm_P0.5mm	U1
1	GND	TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm	TP1
1	LD1117	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U5
1	MCP1700-3302E_SOT23	Package_TO_SOT_SMD:SOT-23	U2
1	SL34	Diode_SMD:D_SMA	D5
1	SW_Push	Button_Switch_THT:SW_PUSH_6mm	SW1
1	TXS0108EPW	Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm	U4
1	USB_C_Receptacle_USB2.0	flashkeeper:USB4215-03-A	J3
1	VoutEN	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	JP1

Questions

How big is the Prog tool PCB?

It measures 55 × 26.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Prog tool use?

70 parts, built around the FT2232HL, LD1117, TXS0108EPW and SL34. 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 Prog tool KiCad files?

From the linuxboot/flashkeeper repository on GitHub, at the commit this page was made from: the board is hw/prog_tool/prog_tool.kicad_pcb and its schematic hw/adapter_soldered/breakout_wide/adapter_soldered.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Prog tool design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/linuxboot-flashkeeper-prog-tool" title="Prog tool 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/linuxboot-flashkeeper-prog-tool.jpg" alt="Prog tool" width="1200" height="900">

A picture that opens the board, for a README

[![Prog tool](https://pcbkit.io/embed/boards/linuxboot-flashkeeper-prog-tool.jpg?size=s)](https://pcbkit.io/boards/linuxboot-flashkeeper-prog-tool)

Source

Repository: linuxboot/flashkeeper
Board file: hw/prog_tool/prog_tool.kicad_pcb
Commit: c55cc60
Homepage: flashkeeper.org
Licence: GPL-3.0

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