Ender 3 Pro Filament Out Sensor

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###Ender 3 Pro Filament Out Sensor### **This sensor circuit is based on the 555 Timer IC and will create an oscillating beep (i.e. continuous beep beep) when your filament runs out.** **PARTS LIST** (1) 555 Timer IC https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (1) 10K 1/4 or 1/2 Watt Resistor https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (1) 10uf 16v (or higher) Electrolytic Capacitor https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (Kit) (1) 2cm x 8cm Project PCB https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (Kit) (2) Dupont Connectors https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (Kit Only) https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (Kit with Crimp Tool) (1) Micro Switch w/Roller https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (1) 5v Piezo Buzzer https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (1) 2x2032 Battery Holder w/Switch https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 (2) M3 bolt and nut https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 **TOOLS NEEDED** Solder Iron https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 Dupont Connector Crimp Tool https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 Hobby Knife https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67 Creality Ender 3 Pro 3D Printer https://www.amazon.com/gp/product/B00K243MIQ/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=dz2021-20&creative=9325&linkCode=as2&creativeASIN=B00K243MIQ&linkId=924ace94234c67dc4f83f530f4eb1e67