# Calculate the derivative of the expression derivative = sp.diff(expr, x)
Every Proteus user has experienced this: You download a datasheet for a cool new sensor, open Proteus to simulate it, search for it... and nothing appears. proteus library
If you don't care about simulation (you just want to build the board), find a component with the same pin count and pitch . Place a generic header or a generic IC, then manually change its PCB footprint to the specific one you need. Warning: Do this only if you know exactly which pin is which. # Calculate the derivative of the expression derivative = sp
Over time, your library will become messy if you aren't careful. Here is how to keep it clean: open Proteus to simulate it