Reduce number of BOM lines
- Use as few different components as possible.
- A single BOM line is costing roughly 100-200 CHF (ordering,
putting roll on machine etc.) and you will save time for
yourself (checking BOM, ordering).
It will also reduce the risk of mounting the wrong components. - Print the BOM, check the resistor values used and see if you can
remove some values by putting them in parallel or series (or
actually taking existing values that are as good).
The same for capacitors (cf. SVEC: 9 C-types, 16 R-types). - Check if high precision or high power components that are used (e.g. 0.1% or 0.5W) are really needed.
- A single BOM line is costing roughly 100-200 CHF (ordering,
putting roll on machine etc.) and you will save time for
yourself (checking BOM, ordering).
(from https://ohwr.org/project/ed/wikis/schematics-checklist)
On this FSI FMC card:
- 7 types 100nF capacitor types used, some just three of them
- 3 types of 10nF
- 17 types of capacitors in total
- 31 types of resistors
- 0.1% resistors needed?
As comparison, an FMC ADC FMCADC100M uses 55 different components, of which 18 resistor types. This board uses 68 types of which 31 resistor types.