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USB-Powered fan-Controller

FoxhoodDesigns·USB-Powered-fan-Controller·KiCad/MVC.kicad_pcb

USB-Powered fan-Controller PCB layout, top view — open source AVR/Arduino board by FoxhoodDesigns

About the USB-Powered fan-Controller PCB

USB-Powered fan-Controller is an open source AVR/Arduino PCB design by FoxhoodDesigns, published on GitHub under the MIT license. It is a 2-layer board measuring 38 × 31.5 mm, with 44 components from 20 distinct parts.

Its main chip is the ATtiny214-SS, from the AVR/Arduino family. Other key parts include the LMR62421XMF. By type, the board carries 16 resistors, 10 diodes, 8 capacitors, 4 connectors, 2 ICs and 2 transistors.

It belongs with the power & battery designs in this gallery.

From the project

A small Fan controller that controls 12V (case)fans from 5V via a switching regulator

During operation one can set the speed of the fan anywhere between 40 and 100 percent. Pressing the encoder SW causes the controller to halt the fan till pressed again

If during operation the FAN either halts OR speeds up too much (wip), the controller will immediately shut off power and remain locked till it got power-cycled as a protection measure against sudden jamming/defects.

Main components on the USB-Powered fan-Controller

LMR62421XMFATtiny214-SS

USB-Powered fan-Controller bill of materials (BOM)

44 components, 20 distinct parts.

QtyPartRefs
1
LMR62421XMF
U1
1
ATtiny214-SS
U2
1
BC848
Q1
1
Q_PMOS_GSD
Q2
2
Conn_01x04_Pin
J1, J2
1
Conn_01x03
J3
1
USB_C_Receptacle_PowerOnly_6P
J4
1
RotaryEncoder_Switch_MP
SW1
2
RSX201L
D1, D10
8
LED
D2, D3, D4, D5, D6, D7, D8, D9
1
IHML2525 6R8
L1
1
220pf
C1
3
10uf
C2, C3, C8
4
100n
C4, C5, C6, C7
1
10.2k
R1
1
86.6k
R2
1
10k
R3
3
2k
R4, R15, R16
3
5k
R5, R6, R7
7
R
R8, R9, R10, R11, R12, R13, R14

USB-Powered fan-Controller design files

The KiCad project lives in the FoxhoodDesigns/USB-Powered-fan-Controller repository on GitHub; these links point at the commit this page was built from.

USB-Powered fan-Controller: common questions

What microcontroller does the USB-Powered fan-Controller use?

The USB-Powered fan-Controller is built around the ATtiny214-SS, from the AVR/Arduino family.

How big is the USB-Powered fan-Controller PCB?

The USB-Powered fan-Controller measures 38 × 31.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the USB-Powered fan-Controller?

44 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the USB-Powered fan-Controller design files?

From the FoxhoodDesigns/USB-Powered-fan-Controller repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the USB-Powered fan-Controller design in my own project?

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

Can I test firmware for the USB-Powered fan-Controller without the hardware?

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

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