Personal project for building a automatic pwm fan and pump control using a 10k thermistor in a liquid watercooling loop. Intended to be used with either two Attiny85 or at least one Arduino Mega 2560
Build and flash the microcontrollers. Use a voltage bridge with a reference resistance of 10k for the Probe. Attach the Probe to Analog Pin 0 (Atmega) or PB2 of the Attiny. Attach the Fan or Pump to pin PB1 of the Attinys, or Pins PE0 and PE1 for the Atmega.
Flashing the Attiny85 with ravedude and the usbasp won't work out of the box.
You could patch ravedude and install it from source:
git clone https://github.com/Rahix/avr-hal.git
cp tiny.patch avr-hal/ravedude
cd avr-hal/ravedude
git apply tiny.patch
cargo install --path .Alternatively, run
avrdude -p t85 -cusbasp -P usb -U .\target\avr-attiny85\release\fan-controll-rs.elfcargo build --release --target avr-specs/avr-atmega2560.json --features pump,fan,phase_pwm,serialcargo build --release --target avr-specs/avr-attiny85.json --features fan,phase_pwm
cargo build --release --target avr-specs/avr-attiny85.json --features pump,phase_pwmUse pump and fan to select the fan curve.
The phase_pwm and simple_pwm features can be used to select the type of pwm implementation.
Specifics are board dependent. Simple will allow you to use a more granular control of the duty cycle, but
my application doesn't need this amount of granularity.
You can enable serial output by using serial on the Atmega. The statement won't have an effect on the Tiny.
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.