A tiered path from electronics foundations to system-level field engineering. Work through each tier's lessons; the next tier unlocks when you've cleared the one below. Your progress is saved on this device.
This is the structural framework. Lessons marked STUB are placeholders waiting for real content; lessons marked LAB are the interactive trainers already built. The tier structure mirrors the real progression (electronics foundation → system-specific competencies → journeyman/senior). Content for the stubs gets added track by track. Progress is stored locally in this browser — it follows the device, not the login, and isn't reported anywhere.