For a lot of reasons, home etching of PCBs is somewhat of a dying art. The main reason is the rise of quick-turn PCB fabrication services, of course; when you can send your Gerbers off and receive ...

0.1%], ferric chloride [0.1%], and tin [0.3%]). A particular strength of our study was that late readings (up to 2 weeks after the application of metal allergens) were required throughout the ...

The iron carbide studies, made with Carapella's reagent (5 gm. ferric chloride, 2 ml. concentrated hydrochloric acid and 99 ml. methyl alcohol) etching for 20–60 min., revealed cracking as the ...

By adding a drop of liquid containing graphene oxide nanoflakes and ferric chloride on a graphite sheet, the researchers exposed this sample to a vapor of the precursor molecules that eventually ...

Bleach is a handy way to mark fabrics, and it turns out that combining bleach with a 3D-printed design is an awfully quick-working and effective way to stamp a design onto a shirt. Plain PLA stamp ...

The Portland Trail Blazers are gearing up for a crucial matchup against the Phoenix Suns, aiming to build on their recent 127-108 victory. Sitting at 13th in the Western Conference with a 20-29 ...

Only once before since it became a federal holiday has Martin Luther King Jr. Day fallen on the same day as a presidential inauguration. That was in 1997, when Bill Clinton took the oath of office ...

In the mid-20th century, community spaces like swimming pools and sporting events became a source of anxiety for parents who were frightened by the rampant spread of poliovirus. Their concerns ...

King III explores his complicated relationship with his father's legend in 'What Is My Legacy?: Realizing a New Dream of Connection, Love and Fulfillment' In 2022, Martin Luther King III, the son ...

Wonder Land: Donald Trump used to be accused of breaking norms. Now it’s ‘disruption.’ Question is: will this approach work in 2025? The answer doesn’t break easily into yes or no. Photo ...