Soldering fume extractor by MarkSvrc

Last crawled date: 3 years, 4 months ago

I could'n find any fume extractor here that would suit my needs, and didn't really want to buy a commertially produced one, so i created my own!
It was design to house a 120x25MM PC fan and two 120x120x10MM active carbon filters easily accesible on Ebay or Aliexpress for pretty cheap, plus a single or perhaps double* (paralleled) 18650 cell battery equipped with a USB charger module and a standart boost converter, and a small rocker switch. Mine was of around 14x9MM mounting size.
off-the-shelf modules:
TP4056 uUSB li-ion charger
MT3608 2A step-up converter
The whole thing fits perfectly on the ender-3 and can easily be printed as one model. Keep the orientation as is! Of course feel free to ask me in the comments if you have any questions regarding the assembly of the device.
*There might only be enough space for 1 battery, depending on the way you put the elecronics together. I am using one high capacity cell, giving me enough time on 1 charge for any soldering job.
The way you are going to place the electronics in the bottom compartment is completely up to you. Both the charger module and the converter are supposed to be glued down to the base (there will be a slot for the uUSB connector), preferably with hot glue so that you can modify the insides if necessary. The way you connect the electronics together:
1) The battery output is connected to the B+ and B- terminals on the charger module.
2) The output of the charger OUT+ and OUT- goes directly to the input of the step-up converter IN+ and IN-. BE SURE TO SET IT UP TO 12V BEFORE CONNECTING to the fan.
3) the output of the converter (now set to 12V) is then connected to the fan.
// not necessary, but just TO BE SAFE, i have added a fuse between the battery and the charger module. Choose one that suits the power consumption of your fan.
The battery should be placed in an 18650 battery holder, but soldering the wires directly to the contacts is also an option. Make sure to use heat shrink tubes for all exposed parts of wires.
You will have to trim down the back cover to make it fit well.