Motivation Out of curiosity I bought a ESP32 board to tinker with, but for almost half a year hadn’t got an idea what to do with it… But then! Project Idea The idea: Every time I get mail into my physical snail mail mailbox, the mailbox shall send a message via Telegram to my smartphone:…
Resistors with 4 rings Color 1. Ring 2. Ring 3. Ring – Multiplier 4. Ring – Tolerance black 0 1 x 1 – brown 1 1 x 10 1 % red 2 2 x 100 2 % orange 3 3 x 1.000 – yellow 4 4 x 10.000 – green 5 5 x 100.000 0.5%…
Calculator for 4 rings 1. Ring 2. Ring 3. Ring 4. Ring Value Tolerance brownredorangeyellowgreenbluepurplegreywhite blackbrownredorangeyellowgreenbluepurplegreywhite blackbrownredorangeyellowgreenbluepurplegoldsilver brownredgreenbluepurplegoldsilver 0Ω 0% Calculator for 5 rings 1. Ring 2. Ring 3. Ring 4. Ring 5. Ring Value Tolerance brownredorangeyellowgreenbluepurplegreywhite blackbrownredorangeyellowgreenbluepurplegreywhite blackbrownredorangeyellowgreenbluepurplegreywhite blackbrownredorangeyellowgreenbluepurplegoldsilver brownredgreenbluepurplegoldsilver 0Ω 0%
To setup the SD Card on MacOS follow these steps Download the Raspbian Image Insert the SD-Card into the reader Open a terminal Find out the device’s name by typing diskutil list Erase the contents / format card to FAT32 sudo diskutil eraseDisk FAT32 RASPBIAN MBRFormat /dev/disk2 sudo diskutil unmountDisk /dev/disk2 Copy image to card…
To save RAM on your Arduino You can annotate immutable variables like lookup tables or strings with the PROGMEM keyword. The data will be stored in program memory. const dataType variableName[] PROGMEM = {data0, data1, data3…};
In 2006 I bought my first Bosch IXO. It did a wonderful job over the last years and helped a lot assemble and disassemble mostly furniture. (I moved 3 times in the last ten years) But when we started to renovate our bureau at home the switch for changing directions started to get a slack…