It was Tuesday, 27th October 2020 and I retrieved my Canon EOS 5D Mark I from my backpack to take some macro photographs. After charging the batteries, I inserted them into the camera, however, it appeared as though there were no batteries present. To verify that they were fully charged, I used a multimeter from my drawer, which indicated that...

6 times sanded, 2x smoothed, 3x re-polished and 2x treated surface

Since 2017, I have participated in the national round of the RoboRAVE robotics competition in the Fire Fighting category organized by the Association for Youth, Science and Technology AMAVET in the Czech Republic.