You are not going to start anywhere near the area where you have to go "full custom". That is, you won't be spinning custom ICs, you'll be assembling custom PCBs from off-the-shelf components. Possibly expensive ones. But that $1000 OTS part is an insane bargain compared to any chip fabbed just for you.
First make your thing do something, anything at all. Second, make it do something useful. Third, make it do the right thing, the thing you need, your goal from the beginning. Only then should you optimize it, making it smaller or cheaper or lower power or prettier or.... This is the road to success in the "R" phase of R&D.
First make your thing do something, anything at all. Second, make it do something useful. Third, make it do the right thing, the thing you need, your goal from the beginning. Only then should you optimize it, making it smaller or cheaper or lower power or prettier or.... This is the road to success in the "R" phase of R&D.