Component Selection

How to choose a component?

First why we need to do a protocol to make components selections? Because if you don’t have only the value and doesn’t have any about the component which will make you more complication in the later stage of design so yo need a better understanding about your components, This will be mainly divided into two ways

1. Software/Tool perspective

2. Hardware/Physical perspective

3. Software

4. Symbol - Library for schematic and layout

Which ever tool you are using it doesn’t matter you definitely need the library for the components which you are using in the design, if the library is not available you can do two things

a. Create a library use a the datasheet of the component to make assure all the pins are correctly configured or mapped do the same for the footprint library b. Download the Library Even if you are using the download library, Please ensure all the pin mapping are correct with datasheet of the component same for the Footprint also otherwise you will mess up with your design

1. Grid/ alignment Make sure that your all symbols are in the same grid if there’s any mismatch between the symbols grid alignment probably you can’t complete the design or that particular component will project differently and it will affect the esthetics of the schematic

2. 3d model This is not mandatory but if you have a 3D model of the component then you will get an idea of how your design looks when it is completed, so you can render your board to get the real board

3. Hardware coming to hardware, a. The size of the component b. footprint c. Application - Temperature, Grade (industrial), . d. Tolerance acceptance e. Range (Voltage) f. specific details (eg: Capacitor- X7R, C0G, de-rating, )

4. Resistor To choose a resistor the main things are the size and wattage of the component, the first for the application and cost of the p there’s trade of between size and cost