I need to make a few relays with timers. it seems the ATTINY85 will fit the bill nicely.
on the devices I have looked at digispark, Chachka/Trinket, and such, they have on-board voltage regulators.
since I use a regulated power supply for most of the stuff I do, it seems to be redundant.
also it appears the USB for programming is super simple. resistors and schottky's , no secondary FTDI chip.....
all I am doing is using the '85, an opto for the input and then a FET for the relay activation.
is there a reason for the board mounted voltage regulator that I am missing ?