![]() ![]() The Arduino cannot run the fan as the current it pulls would damage the Arduino (a bit dramatic actually! it would trip the onboard fuse). and will include links to the best (in my opinion) sites to get the best out of each.Ī single usb cable provides power to the Arduino AND to the USB fan. There are some great sites out there explaining how to use each. ![]() If I can find a way around something and it works, then it works. I'll include the sketch here later, once I've tidied it up a bit, but please be warned, I am NOT a coder, I understand good coding principles, but tend to be a lazy coder. One to read and translate the temperature data from the DHT11.One to drive the irf520 mosfet to switch the fan on.I bread boarded the components and made a start on a sketch. Pots and switches were attached, smoked acrylic hot glued in and Dyno labels produced for that retro look.Īll based around an Arduino Uno. It gives a very unforgiving matt finish, just what I was looking for. It's a great paint for mdf as it soaks in well and doesn't need an undercoat. A couple of coats of blackboard paint were applied. Once holes had been drilled and chiselled in the back and side for temperature sensor, usb socket and usb power in. ![]() Halfway through, I wish I'd gone for 3mm ply for the front, instead of 12mm MDF as there was more wood removed than remained. A rectangular hole was chiselled out to hold a small smoked grey acrylic panel, behind which I planned to secure one of those cute OLED displays. The front was then drilled to fit 4 10k Potentiometers and 1 over the top on/off switch which would control power to Arduino and fan. The 12mm MDF was cut at home quite easily, before glue and screw to form a working base and front. Depth was quite flexible, so I went for 180mm to give plenty of room. The size of the case was governed by the size of the base of my 24" monitor and 4 port KVM switch at 220mm wide and final height I wanted my monitor set to. 1 sml tin blackboard paint - suitable for MDF with 1 coat.4 10k Potentiometers with different coloured knobs - to control fan speed, on time, off time, temp set point.1 IRF520 Mosfet module - to switch the USB power on and off for the fan.96" OLED display - to display variables - speed, temperature etc 1 DHT11 - digital temperature and humidity sensor - to sample temperature only. ![]()
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