2 layers15.2 × 20.3 mm Tmtua, the printed circuit board in 3D

Tmtua

A drop-in connector for your quiet storm

Size: 15.2 × 20.3 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 6
Nets: 17
Pads: 30
Tracks, vias: 29, 0
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 23 Aug 2024
Updated: 3 Oct 2024

Overview

Tmtua is an open-source printed circuit board by willpuckett, from the willpuckett/tmtua repository on GitHub. It is a 2-layer board of 15.2 × 20.3 mm with 6 parts on 17 nets, routed with 29 tracks and 0 vias.

It is built around the B-2100S08P-A110, HF1004E and PZ200V-11-03P.

Main components

README

README.md

TMTua

A drop-in fan connector for your Quiet Storm.

TMTua

TMTua is smallish board with a single purpose: to connect a 4 pin (Noctua) fan to your printer pcb without having to crimp a custom cable ever again.

Features

3/4 pin fan connector
No soldering required
Voltage selection jumper (5V or Motor Voltage)

Usage

Install the TMTua in a spare stepper driver slot on your printer pcb. Make sure the orientation is correct by aligning the top silk screen that says "EN" with the stepper driver slot's enable pin. If you install this backwards, bad things™ will happen.
Connect the fan to the TMTua using the 4 pin connector.
Set the voltage jumper to the desired voltage (5V or Motor Voltage). There is no buck on board, so if you have a 24V printer, you CANNOT use a 12V fan.
Match your stepper slot's pin numbers to the TMTua's pin numbers using the following table and your PCB's schematic/pinout diagram in your printer firmware.

TMTua Pin	Stepper Driver Pin
fan0
tach0	EN
tach1	UART¹
fan1
pwm0	STEP
pwm1	DIR

Example Klipper Configuration

text

[fan_generic fan_1]
pin: PA1
tachometer_pin: ^PD8

Tachometer Pull-ups

You can use the Noctua white paper to assess whether the onboard pull-up if there's already one on the EN pin is sufficient for the tach pins and your fans.

The paper outlines the following minimum recommendations:

Voltage	Pullup Resistor(Ω)
5V	1k
12V	2k7
24V	12k

For example, the internal pull-ups on STM32F407 are about 40k which are sufficient for all cases, but the hardware 10k pull-up on EN on my Robin Nano v3 board is too strong for a 24v fan, though fine for 5 and 12v fans.

Schematic

Where Do I Get One?

You can order the board from JLCPCB using the production_files directory.

They're also available on my here.

May not be wired on older boards. On newer boards, you may need to jumper the UART pin under the stepper driver slot to connect it to your mcu. Consult your board's schematic for more information. ↩

Parts

Qty	Value	Footprint	References
2	B-2100S08P-A110	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J1, J2
2	HF1004E	Connector:FanPinHeader_1x04_P2.54mm_Vertical	CN1, CN2
2	PZ200V-11-03P	Connector_PinHeader_2.00mm:PinHeader_1x03_P2.00mm_Vertical	J3, J4

Questions

How big is the Tmtua PCB?

It measures 15.2 × 20.3 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Tmtua use?

6 parts, built around the B-2100S08P-A110, HF1004E and PZ200V-11-03P. 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 Tmtua KiCad files?

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

Can I use the Tmtua design in my own project?

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

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/willpuckett-tmtua" title="Tmtua 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/willpuckett-tmtua.jpg" alt="Tmtua" width="1200" height="900">

A picture that opens the board, for a README

[![Tmtua](https://pcbkit.io/embed/boards/willpuckett-tmtua.jpg?size=s)](https://pcbkit.io/boards/willpuckett-tmtua)

Source

Repository: willpuckett/tmtua
Board file: tmtua.kicad_pcb
Commit: addd868
Licence: Not stated

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