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2 layers20.8 × 31.4 mmOneMoreThermistor, the printed circuit board in 3D

For when you need just one (or two) more stupid thermistor ports on your printer. This board takes an MCU of the Xiao or adafruit QT PY formfactor

Size
20.8 × 31.4 mm
Copper layers
2
Thickness
1.6 mm
Parts
13
Nets
18
Pads
40
Tracks, vias
36, 12
Pours
1
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
18 May 2022
Updated
12 Jun 2022

Overview

OneMoreThermistor is an open-source printed circuit board by cbc02009, from the cbc02009/OneMoreStupidThermistor repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 20.8 × 31.4 mm with 13 parts on 18 nets, routed with 36 tracks and 12 vias.

It is built around the BAV99S. Its parts include 6 resistors, 4 connectors, 2 capacitors and 1 diode.

Main components

1

README

README.md

OneMoreStupidThermistor

For when you need just one (or two) more stupid thermistor ports on your printer. This board takes an MCU of the Xiao or adafruit QT PY formfactor

Images

3D View

Front View

Rear View

Seeduino Xiao Config Example

ini
[mcu jomt]
serial: /dev/serial/by-id/usb-Klipper_samd21g18a_F6407A985733535020312E322A090CFF-if00
restart_method: command

#If using T1
[temperature_sensor chamber]
sensor_type: Generic 3950
sensor_pin: jomt:PA2

#If using T2
[temperature_sensor chamber]
sensor_type: Generic 3950
sensor_pin: jomt:PA5

Adafruit QT Py rp2040 Config Example

ini
[mcu jomt]
serial: /dev/serial/by-id/usb-Klipper_rp2040_DF60BCA003201A39-if00
restart_method: command

#If using T1
[temperature_sensor chamber]
sensor_type: Generic 3950
sensor_pin: jomt:gpio28

#If using T2
[temperature_sensor chamber]
sensor_type: Generic 3950
sensor_pin: jomt:gpio29

Parts

13
QtyValueFootprintReferences
42.37KResistor_SMD:R_0805_2012MetricR2, R3, R5, R6
20.1uFCapacitor_SMD:C_0805_2012MetricC1, C2
24.7kResistor_SMD:R_0805_2012MetricR1, R4
2Conn_01x02Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_VerticalJ1, J4
2Conn_01x07Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_VerticalJ2, J3
1BAV99SPackage_TO_SOT_SMD:SOT-363_SC-70-6D1

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Questions

How big is the OneMoreThermistor PCB?

It measures 20.8 × 31.4 mm and has 2 copper layers, 1.6 mm thick.

What parts does the OneMoreThermistor use?

13 parts, built around the BAV99S. 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 OneMoreThermistor KiCad files?

From the cbc02009/OneMoreStupidThermistor repository on GitHub, at the commit this page was made from: the board is OneMoreThermistor.kicad_pcb and its schematic OneMoreThermistor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the OneMoreThermistor 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).