Here's a Doraemon encyclopedia listing every gadget that appeared in the series : r/MangaCollectors

All Recently Bought Things Anime/Japan related (DVD/Blu-ray/Figures/Manga/Live Action/Merchandise/Video Games Etc - Other Anime - AN Forums

Category:Gadgets originated from original manga, Doraemon Wiki

All Recently Bought Things Anime/Japan related (DVD/Blu-ray/Figures/Manga/Live Action/Merchandise/Video Games Etc - Other Anime - AN Forums

Correlating Physicochemical And Biological Properties To, 59% OFF

Automatic Buying Machine, Doraemon Wiki

Doraemon 1 - 10 ( English and Japanese ) BILINGUAL COMICS and Basic Expression for daily life: Fujiko F Fujio: Books

Just passed $10K on the manga collection! It's been about a year and a half since I started and I've loved this hobby through and through. Any recommendations would be appreciated too! : r/MangaCollectors

Turns out Doraemon predicted all the AI stuff around 44 years ago : r /singularity

Doraemon: Nobita's Secret Gadget Museum, Doraemon Wiki