AVR Timer calculations:

AVR UART calculation:

Converting a digit-code component marking to its value:

Converting oddball units to something legible:

Wanting to create a certain value resistor as a combination of two parallel ones that are in a certain set:

Result of that calculation:

Wanting a certain series resistor to achieve a particular voltage at a load:

Identifying a thread by the screw diameter and pitch:

Creating a voltage divider that has a particular resistor sum value out of resistors in a particular set:

Calculating the resistor combination to set a particular output voltage on the MP2307 switched mode power supply circuit: