Pssst! Hey…hey, buddy, wanna get an extra KB for cheap? When I write OO-style code in C, I usually start with something like the following, in which I use malloc() to allocate memory for a variable of a particular type, perform some initialization actions, and then return it to the caller: Button *button_new(uint8_t pin, uint8_t poll_freq) { Button *button = (Button *)malloc(sizeof(Button)); // do some initialization stuff return button; } And when initially writing pipower, that’s exactly what I did.