🇫🇷 🇬🇧

buy rev1 on ebay 📦

buy rev1 (silent fan) on ebay 📦

PiFanIrHat

Fan

⚠️ need raspbian buster, good version of gpio-fan overlay, come with kernel 4.19.

configuration: edit /boot/config.txt, add folowing line

dtoverlay=gpio-fan,gpiopin=18,temp=55000

On/Off button

on/off button is connected to gpio3 and GND

configuration: edit /boot/config.txt, add folowing line

dtoverlay=gpio-shutdown,gpio_pin=3,active_low=1,gpio_pull=up

⚠️ on raspberry pi 4, only shutdown work, with original bootloader. For power on, bootloader need to be update to RC3.3 last version (see https://www.raspberrypi.org/forums/viewtopic.php?f=117&t=246027)

Download the last bootloader at recovery section https://www.raspberrypi.org/downloads/

IR receiver

install ir-keytable

sudo apt install ir-keytable

configuration: edit /boot/config.txt, add folowing line

dtoverlay=gpio-ir,gpio_pin=17,gpio_pull=1,rc-map-name=<keymap file for your remote>

keymap files path is /lib//udev/rc_keymaps/

test remote

sudo ir-keytable -t -v -p all

IR power On

⚠️ on raspberry pi 4, only shutdown work, with original bootloader. For power on, bootloader need to be update to RC3.3 last version (see https://www.raspberrypi.org/forums/viewtopic.php?f=117&t=246027)

Download the last bootloader at recovery section https://www.raspberrypi.org/downloads/

❕ For key learning, press Rec button, led stay on, press remote key, led return off.

flash Attiny85 with file PiFanIr.hex

avrdude -p attiny85 -P COM5 -b 19200 -c avrisp -u -U flash:w:PiFanIr.hex

flash attiny85 fuses : lfuse:E2 , efuse:FF , hfuse:DF

avrdude -p attiny85 -P COM5 -b 19200 -c avrisp -u -U lfuse:w:0xe2:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m

PCB

Schematic

Révision

rev1

• bad footprint for eeprom