Even if you asked an engineer what something is he probably wouldnt instantly know what it is , most engineers work with pic chips . Its not like , OMG I remember this wiring ... No engineer is gonna research anything for you unless you pay them for it .
Not that hard ? Those can be anything ...
Normally when you make something you ask yourself what should be done , then figure out how to do it with the chips wich sometimes means learning the chips , when you dont understand the chip you read about it . Simple as that .
Triangle in the triangle , square in the square , round in the round .
Things would go faster if you would go by this method .