FanCtrl3

mikagosz·FanCtrl3·hardware/pro/FanCtrl3-Pro.kicad_pcb

About the FanCtrl3 PCB

FanCtrl3 is an open source RP2040/RP2350 PCB design by mikagosz, published on GitHub under the MIT license. It is a 2-layer board measuring 90 × 60 mm, with 35 components from 19 distinct parts.

Its main chip is the Raspberry Pi Pico, from the RP2040/RP2350 family. Other key parts include the TPS2553DBV and LM27313XMF. By type, the board carries 16 resistors, 7 capacitors, 4 connectors, 3 ICs, 3 transistors and 1 diode.

It belongs with the sensors designs in this gallery.

From the project

USB-powered controller for three 4-pin PWM fans, driven by the CPU temperature of a Proxmox VE host - KiCad, MicroPython, OpenSCAD

A USB-powered controller for three 4-pin PWM fans, driven by the CPU temperature of a Proxmox VE host.

One USB cable to the host is all it needs — power, control and fan speed readings all go over it. The fan curve runs inside the controller, so a host reboot, a crashed service or a pulled cable never leaves the fans stopped.

Designed for small home servers and mini PCs running Proxmox: the machine sits in a closed cabinet, its own fan is not enough for the cabinet, and a set of quiet 120 mm fans should spin up only when the server actually works.

FanCtrl3, from the project README — From the project README

Main components on the FanCtrl3

Raspberry Pi Pico TPS2553DBV LM27313XMF

FanCtrl3 bill of materials (BOM)

35 components, 19 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	Raspberry Pi Pico	RaspberryPi_Pico_SMD_HandSolder	U1
1	TPS2553DBV	SOT-23-6_Handsoldering	U2
1	LM27313XMF	SOT-23-5_HandSoldering	U3
3	2N7002	SOT-23_Handsoldering	Q1, Q2, Q3
1	FAN1	Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J1
1	FAN2	Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J2
1	FAN3	Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J3
1	DS18B20	TerminalBlock_Xinya_XY308-2.54-3P_1x03_P2.54mm_Horizontal	J4
1	SS14	D_SMA_Handsoldering	D1
1	10U 10u	L_Changjiang_FNR5040S	L1
2	100N 100n	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C7
3	10u 25V	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C2, C4, C5
1	220P 220p	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C3
1	100u 25V	CP_Radial_D6.3mm_P2.50mm	C6
2	51K 51k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R4
5	10K 10k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R2, R6, R13, R14, R15
4	100K 100k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R3, R7, R8, R9
1	91K 91k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R5
4	4K7 4k7	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R10, R11, R12, R16

FanCtrl3 design files

The KiCad project lives in the mikagosz/FanCtrl3 repository on GitHub; these links point at the commit this page was built from.

FanCtrl3: common questions

What microcontroller does the FanCtrl3 use?

The FanCtrl3 is built around the Raspberry Pi Pico, from the RP2040/RP2350 family.

How big is the FanCtrl3 PCB?

The FanCtrl3 measures 90 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the FanCtrl3?

35 components, from 19 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 FanCtrl3 design files?

From the mikagosz/FanCtrl3 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 FanCtrl3 design in my own project?

Yes, under the terms of its MIT license, which mikagosz chose for the repository.

Can I test firmware for the FanCtrl3 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.