How can machine code actually create electric signals to turn transistors on and off?

Question

I’m a junior EE student, but I’m still genuinely confused about this, and other answers still haven’t cleared my confusion. How can voltages be manipulated by code in a digital circuit without someone physically closing and opening circuit connections?

In: Engineering

Answer 1

The ones and zeros are voltages. A voltage opens or closes a transistor. This is “physically” closing and opening connections.