This project introduces a functional extruder at a reasonable price, which can be affordable to the fablab community and others.
Project in progress by Fablab_Irbid
Bring river monitoring to a new level! Monitor the pH, water level, and pollution by insoluble substances of a river from anywhere.
Project tutorial by Andrei Florian
Alexa controlled timers at a glimpse. A really fancy egg-timer with added temperature control.
Project tutorial by 2dudes
Good project writeup. You might want to consider revising your schematic to use a darlington setup. The wiring as you have it can create a lot of noise. James Lewis has a good writeup of it here: https://www.baldengineer.com/pwm-3-pin-pc-fan-arduino.html
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