There’s a particular kind of project that a lot of engineering students want to attempt but never quite start. Building a processor is high on that list. It sounds like the sort of thing reserved for graduate research or a professional chip team, not something you’d take on by yourself with a development board and a free copy of some software.
That reputation is mostly wrong, and the best proof is how many students do exactly this every year. One of them, an RIT Computer Engineering student named Ryan, spent about six weeks over his summer break designing a five-stage pipelined MIPS processor from scratch in VHDL and running it on a Digilent Basys 3. He hadn’t taken the computer architecture course in his major yet. He’d never used the board or the toolchain before. He taught himself the whole thing using resources anyone can find online.
His experience is worth borrowing from, because the advice he came away with is the kind of grounded, been-there guidance that actually helps a beginner take the first step. If you’ve been circling a project like this, here’s a realistic way to start.
Accept That the Beginning Feels Overwhelming
The first hurdle is psychological, not technical. When you open a professional design suite for the first time and stare at synthesis reports, constraint files, and simulation waveforms, it’s easy to conclude the field is gatekept and you’re not ready. Nearly everyone feels this. It fades faster than you’d expect once you have one small thing working.
“When you are starting out in FPGA it may feel overwhelming, but there are lots of tutorials, YouTube channels, and articles to learn from.”
The point is that the material is out there and it’s free. The barrier isn’t access, it’s the willingness to sit in a little confusion for a while and keep going. Every person who builds one of these projects goes through the same early fog. Expecting it makes it much easier to push through.
Learn the Building Blocks Before the Big Build
Ryan’s most concrete piece of advice is to not start with the processor. Start smaller, with the fundamental components that everything else is made of.
“If you have never done anything with digital design, I recommend looking at the HDLBits website and learning some basic components via Verilog.”
HDLBits is a free set of small, self-contained exercises that build hardware description language skills one concept at a time. You write a little logic, it gets checked, you move on. It’s a low-pressure way to get comfortable with how HDL actually describes hardware, which is a genuinely different mindset from writing software. Before you ever try to wire up a datapath, you want the muscle memory for things like multiplexers, registers, counters, and simple state machines.
This is the same progression that shows up in good coursework. Concepts like flip-flops, control units, and finite state machines come first, then you combine them into something larger. If you want a structured view of how that ladder works on real hardware, Digilent’s write-up on teaching digital design from gates to systems lays out a sensible order to learn in.
Pick a Board You Won’t Outgrow in a Week
Hardware matters more than beginners expect. You want a board that’s approachable enough to start on but capable enough to hold a real project once you get going. Ryan used the Basys 3, and it’s a common choice in university digital design and computer architecture labs for good reason.
It’s an entry-level board built around an AMD Artix-7 FPGA, and it comes with enough on-board input and output to build meaningful projects with nothing extra to buy. Sixteen switches, sixteen LEDs, five pushbuttons, and a four-digit seven-segment display are all right there, which is exactly why Ryan could get his processor’s output on screen without adding any hardware. When his CPU finally computed something, he had a display ready to show it. That kind of immediate, visible feedback matters a lot when you’re learning, because it turns abstract logic into something you can watch happen.
A realistic starting stack
- A capable entry-level board like the Basys 3
- The free version of AMD’s Vivado Design Suite, which the board is designed for
- HDLBits for HDL fundamentals before you start the main project
- One clear first goal you can actually see on the hardware
Get the Tools Working Early
A surprising amount of early friction has nothing to do with logic design. It’s installation, drivers, board files, and getting a project to build and program the board at all. It’s worth pushing through this setup step on its own, before you’re also trying to debug your own design, so the two kinds of problems don’t tangle together.
The Basys 3 is designed for AMD’s Vivado Design Suite, and the free edition is enough for the whole project. If you’re setting up for the first time, or setting up a lab full of machines, Digilent’s guide to getting up and running with Vivado walks through the install and the basic project flow so you’re not guessing.
Expect to Spend Most of Your Time Debugging
Here’s the part nobody tells beginners clearly enough. The design work is real, but the majority of your time will go to simulating, testing, and debugging. That’s not a sign you’re doing it wrong. That is the work.
Ryan hit a classic wall that’s worth knowing about in advance. His logic passed in behavioral simulation, then broke once it was running on actual hardware, because real timing exposed an assumption his simulation never tested. Tracking that down took a while. His reflection on it is the best mindset you can bring to a project like this.
“Nothing teaches you how something really works better than figuring out how you built it wrong.”
If you treat every bug as a failure, this process will feel miserable. If you treat each one as the actual mechanism by which you’re learning how the hardware behaves, it turns into the most valuable part. The students who finish these projects are usually just the ones who reframed debugging as the point rather than the obstacle.
Aim for One Small, Visible Win First
The single most useful piece of strategy in Ryan’s whole experience is how his project actually came together. It didn’t arrive all at once. It turned on one tiny result.
“I was able to run an incredibly basic 1+2 with the MIPS and display it to my seven-segment display. Everything came together very quickly after that seemingly trivial 1+2.”
Once his processor could add two numbers and show the answer, the harder programs followed almost immediately. Fibonacci, then prime numbers, all within a short window. The lesson for anyone starting out is to define a first milestone that feels almost embarrassingly small and get the whole chain working end to end for that one case. Proving the pipeline works for 1+2 is most of the battle. Everything after is expansion.
So don’t set out to build the finished, full-featured processor on day one. Set out to make the simplest possible thing run all the way through, from instruction to visible output. That’s the version of the project you can actually reach, and it’s the version that unlocks the rest.
Just Start
If there’s a single message in all of this, it’s that the gap between “I could never build that” and “I built that” is smaller than it looks. Ryan wasn’t a specialist when he began. He had one prior digital design course and a summer, and he used free tutorials, an affordable board, and a lot of patience while debugging to build something he’s genuinely proud of. Along the way he picked up pipelining, hazard handling, timing constraints, and a real feel for what’s happening inside every processor he uses.
The resources are free. The board is student-friendly. The only part that’s on you is deciding to start and being willing to be confused for a little while. If you’ve been thinking about a project like this, treat that as your sign to open the tools and build your own version of 1+2.
