3D Printed Solder Fume Extractor (HEPA Filter)

thingiverse

Simple solder fume extractor using a HEPA filter instead of an activated carbon one. Why HEPA? See https://www.sentryair.com/blog/solder-fume-control/comparing-solder-fume-extractors-its-all-about-the-filter/. Here is a GIF of it in operation (as well as a rough schematic): https://imgur.com/a/SEjbnkx. Also, this design uses a variable speed fan controlled by an ATtiny13. If you stick with this MCU, you will have to write some efficient code for both ADC and PWM. So either: 1. Use this tutorial: https://adnbr.co.uk/articles/adc-and-pwm-basics. 2. Change the MCU to something like an ATtiny45 or better. 3. Or if you're a daredevil, you could just use a simple 555 timer circuit. Part list: 1. x1 HEPA filter, 115x115x12mm, I got mine from: https://goo.gl/GgAMQW. 2. x1 High CFM fan, similar to DELTA PFB1212GHE. 3. x1 Fuse holder, something like https://goo.gl/aDMRGY. 4. x1 5x20mm 1A fuse. 5. x1 Power jack, something like https://goo.gl/KA4by6. 6. x1 Power switch, something like https://goo.gl/qEp3Jj. 7. x1 10K potentiometer, something like https://goo.gl/jgKCEK. 8. x1 ATtiny13 or similar. 9. x1 10K resistor. 10. x1 LM7805 or similar. 11. x2 10uF electrolytic capacitor, at least 25V. 12. x1 100nF ceramic capacitor, at least 15V. 13. A bunch of wire and a single piece of veroboard. 14. UPDATE: 130x130x10mm activated carbon filter, like https://goo.gl/SwdERG. UPDATE: "Carbon-filter-holder_v10a.STL" houses a carbon-activated filter, so now the extractor has two-step filtering.