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Fan controller pico

Lannakin·fan-controller-pico

Fan controller pico PCB layout, top view — open source RP2040/RP2350 board by Lannakin

About the Fan controller pico PCB

Fan controller pico is an open source RP2040/RP2350 PCB design by Lannakin, published on GitHub. It is a 2-layer board measuring 19.3 × 64.1 mm, with 44 components from 25 distinct parts.

Its main chip is the PWR, from the RP2040/RP2350 family. Other key parts include the TPS259472ARPWR and TXU0204. By type, the board carries 20 resistors, 7 capacitors, 4 diodes, 3 ICs, 3 connectors and 1 transistor.

From the project

(note: hobbiest) expansion board for controlling 4 4-pin 12v fans for the raspberry pi pico series using pwm output with tachometer feedback designed by a cat

⚠️ i am just making this for a hobby. i have no idea what i am doing. i ⚠️ ⚠️ am a cat. ⚠️

i hope github completely mangles my indentation.

using the gratuitously over-qualified raspberry pi pico series, this expansion board is meant to control up to 4 fan connections that had better not exceed 1.5a. they should be 12vdc as well.

pwm output from pico is shifted from 3.3vdc to 5vdc because if i used a 12vdc noctua fan, that's what noctua expects.

Main components on the Fan controller pico

TPS259472ARPWRTXU0204

Fan controller pico bill of materials (BOM)

44 components, 25 distinct parts.

QtyPartRefs
1
TPS259472ARPWR
TPS259472A
Texas Instruments
U1
2
TXU0204
U2, U3
1
RU1C002ZPTCL
RU1C002ZP
Rohm Semiconductor
Q1
1
PWR
CN1
1
RaspberryPi_Pico
CN2
1
RaspberryPi_Pico
CN3
4
Conn_01x04
FAN1, FAN2, FAN3, FAN4
1
OKI-78SR-5/1.5-W36H-C
OKI-78SR-5/1.5-W36-C
Murata Power Solutions Inc.
PSU1
1
599-0060-007F
VSYS
Dialight
LD1
1
TPSMA6L12A
Littelfuse Inc.
D1
2
SMF12A
Eaton - Electronics Division
D2, D3
1
RBS1MM40A
D4
1
10uF
C1
1
0.56nF
C2
1
EEEFT1H221AP
220uF
Panasonic Industry
C3
4
1uF
C4, C5, C6, C7
1
470k
R1
1
97.6k
R2
1
390k
R3
1
2.43k
R4
Show 5 more
QtyPartRefs
2
47k
R5, R8
1
180
R6
1
5.5k
R7
8
10k
R11, R12, R15, R16, R17, R18, R23, R24
4
7.5k
R21, R22, R25, R26

Fan controller pico design files

The KiCad project lives in the Lannakin/fan-controller-pico repository on GitHub; these links point at the commit this page was built from.

Fan controller pico: common questions

What microcontroller does the Fan controller pico use?

The Fan controller pico is built around the PWR, from the RP2040/RP2350 family.

How big is the Fan controller pico PCB?

The Fan controller pico measures 19.3 × 64.1 mm, has 2 copper layers and is 1.7534 mm thick.

How many components are on the Fan controller pico?

44 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fan controller pico design files?

From the Lannakin/fan-controller-pico repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Fan controller pico design in my own project?

The repository has no license, so all rights stay with Lannakin. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Fan controller pico 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.

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