Observed arrival · 2026-09-26
HDLbits: three languages, one judge
A browser-based practice site for learning digital design through Verilog, SystemVerilog, and VHDL circuit problems.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Digital-design learners and RTL practitioners
- Worth noticing
- The problem map includes branch prediction alongside fundamentals such as wiring, modules, and state machines.
Field notes
The visible curriculum separates language fundamentals, circuit building, and verification rather than presenting one undifferentiated problem list. It also links coding-practice guides and theory overviews, with topics including procedural code, state machines, simulation reading, and testbench writing.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue