circuit parameters (voltage/current/frequency/etc.)

[dann11]

When designing a circuit which circuit parameters (voltage/current/frequency/etc.) must I consider or used in my calculation is it the max. values? the min. values? or the typical values? Thanks..

 

[srizbf]

one cannot generalise the selection for your question.
it depends on the particular circuit you are designing.

 

[BradtheRad]

If we are practical minded we make a priority of minimizing cost, waste, size, weight, hazards. As a result our tendency is to use the least voltage we need to, and the least Amperage we need to.

Another priority is to use a common power source. For instance, if our project is portable, then it must be compatible with batteries, usually the fewer the better.