Built for engineers who think in logic.

This website is operated by Codiode.

Codiode is an online learning platform designed for hardware and digital design engineers. We offer interactive circuit-building problems (LOGIX environment) and RTL coding challenges (Verilog / SystemVerilog) with real-time automated grading, so engineers can practice and sharpen their skills at any point in their career.

What we do

Codiode provides two core problem-solving environments:

• LOGIX - A visual drag-and-drop circuit builder where you wire up gates, flip-flops, and combinational blocks to solve digital design problems. The simulator evaluates your circuit against hidden test vectors and gives immediate pass/fail feedback.
• RTL - A browser-based Verilog/SystemVerilog editor backed by a real Icarus Verilog toolchain. Submit your HDL code and receive waveform output, synthesis reports, and grading results in seconds.

We also offer a structured skills track, community discussions, weekly contests, and a Pro subscription tier that unlocks advanced problem sets, detailed solutions, and priority grading.

Our mission

Hardware design roles demand practical hands-on skill, yet most learning resources stop at theory. Codiode bridges that gap by giving engineers a realistic, tool-driven environment where every problem mirrors the kind of work done in ASIC, FPGA, and verification teams at top semiconductor companies.

Products and services

• Free tier - Access to a curated set of circuit and RTL problems, community forums, and the public leaderboard. No credit card required.
• Codiode Pro - Monthly - Full problem library, detailed editorial solutions, contest participation, and streak recovery. Priced at INR 399 per month.
• Codiode Pro - Annual - All Pro benefits billed yearly at a discounted rate of INR 1,599 per year (equivalent to INR 133/month).

All subscriptions are digital-only. No physical goods are sold or shipped. Payments are processed securely through Razorpay.

Company details

Contact us

Questions, feedback, or support requests can be sent to team@codiode.com. We aim to respond within two business days.