Scope, Sources & Corrections

Circuit Card Academy is a self-study course in diagnostic reasoning and a bench companion. It does not authorize work on flight hardware, replace a controlled maintenance procedure, qualify an inspector, or issue an accredited credential. Examples are fictional training circuits and deliberately simplified. Independent physical practice is limited to the guided passive-circuit labs; other energized, rework, environmental and injection examples represent supervised shop methods requiring their own authorization.

How to use technical claims

Distinguish a measured observation, a supported diagnosis and an unproved physical mechanism. Use the actual device datasheet, assembly revision, controlled test method and acceptance limits for real work. A known-good comparison only helps when configuration, setup and operating conditions match.

Editorial revision: 2026-09-10. This identifies the content revision, not an independent human certification or an approval for regulated work. Quiz scores and drill history retain their assessment revision; earlier results remain labelled as earlier evidence.

Primary references behind this revision

• Vishay standard ohmic values: preferred resistor values, including 13.3 kΩ in E48/E96.
• Texas Instruments LM3710: an example supervisor with supply monitoring, manual reset and watchdog functions; actual devices vary.
• Analog Devices output clipping guidance: input and output headroom affect amplifier behavior.
• Tektronix floating measurements and operator protection: grounding, differential measurements and rated equipment.
• ST TVS application note AN5887: unidirectional and bidirectional TVS behavior.
• Fluke RMS and harmonic measurement: measurement bandwidth and crest-factor limitations.
• Global Electronics Association standards: obtain the applicable IPC standard, revision and addenda from the publisher or controlled shop library.
• IAQG standards: the 9100 quality-system family, including 9110 maintenance organizations. Applicability is organization- and contract-specific.
• NASA Technical Standards: verify a specific standard number, current status and program applicability; the 8739 family is not one blanket soldering rule.

Records and privacy

Learner entries are stored in this browser profile on this origin. The application has no account or record-upload feature. Storage can be blocked, cleared or unavailable; export JSON backups regularly. Other people using the same browser profile may see the record. Do not enter controlled, proprietary or personal repair information without permission. Public hosting can receive normal request metadata and may add host-managed analytics; this is separate from the application's local record storage.

The offline distribution contains no third-party runtime scripts. It must be served over localhost or a suitable web host, not opened as a file URL. See Data & offline for readiness and backup controls.

Report a suspected content error

Record the page URL, heading or question ID, this revision, the exact claim, why it is incorrect and a primary reference. Save that note or provide it to the Academy maintainer through your established contact. Do not include controlled board data. Pending a correction, the applicable controlled procedure and datasheet take precedence.