de:volt Learn grew up today. The biggest additions are a full digital logic course and objective feedback that tells you what is actually wrong, but the quieter changes matter too, especially if you teach with Learn or care about your data.

Logic Gates: eight modules of real digital electronics

The new Logic Gates course takes you from digital HIGH and LOW through NOT, AND, OR, NAND, and XOR, then finishes with a half-adder capstone and a bonus NAND latch, the first circuit in the course that remembers something. Every circuit uses real 74LS-series chips from the simulator catalog (74LS00, 74LS04, 74LS08, 74LS32, 74LS86) with DIP switches and indicator LEDs, so what you build in a lesson is exactly what you would wire on a physical breadboard.

The intro course stays free. Logic Gates is the first course for Pro and school members, and its modules show an Upgrade badge for everyone else.

"Why it isn't passing"

Until now a failing lesson objective gave you an encouraging nudge and left the diagnosis to you. A failing objective now names the first measurement that failed and shows the actual value next to what was expected. If your LED current is 2 mA and the lesson wants at least 5 mA, it says so. The check runs deterministically in your browser, with no AI involved.

Hints got smarter about ordering too: the hint relevant to your specific failure comes first, hints reveal one at a time, and if you have been stuck for about twenty seconds Learn offers one on its own.

Fairer marking for teachers

Timing-based lesson work (RC delays, blinkers, fades) used to be re-graded against a frozen snapshot of the circuit, which could mark correct work wrong after the fact. Marking now trusts the live result captured when the student submitted, and it labels each criterion so you can see whether it was verified live at submission or re-verified later. Score pre-fill no longer zeroes out correct timing work, and the Module Creator can finally publish timing-based modules of your own.

Two smaller classroom fixes: learners who are not in any class no longer see empty "My classes" and "Assignments" tabs, and class members now correctly receive the full Learn library through their school membership.

Download your data, delete your account

Learn has a new Account page, reachable from an always-visible link. From there you can download a JSON export of your profile, lesson attempts, progress, class memberships, and submissions, or delete your account entirely after a typed confirmation. The page is deliberately not age-gated, so a blocked or under-13 user can still exercise their data rights.

Fixes and improvements

• A broken objective check now shows "check unavailable" instead of a permanent red failure.
• Series-circuit checks require a true two-terminal junction, so accidental shortcuts no longer pass.
• A charged capacitor can no longer masquerade as the supply rail in objective checks.
• Blink objectives can require a genuine oscillator, which ends the time-honoured tradition of passing by flicking a switch rhythmically.

The full course list is at learn.devoltapp.com, and the teaching workflow is documented at docs.devoltapp.com/learn/teaching.