Rectifier/DC Power Supply Ripple Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-152

Effect

Computation or source lookup only

Input and validation requirements

Zero filter capacitance makes the ripple denominator vanish, producing an undefined result that requires input rejection. The specification also leaves the transformer-secondary voltage convention unspecified, causing materially different Vpeak, Vdc, and percent-ripple results for the same displayed voltage.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "transformer_secondary": "12 VAC RMS",
    "rectifier_type": "half-wave",
    "load_current": "0.50 A",
    "filter_capacitance": "10000 µF",
    "line_frequency": "60 Hz"
  },
  "expected_outputs": {
    "Vpeak_ideal_V": 16.9706,
    "Vdc_V": 16.5539,
    "Vripple_pk_pk_V": 0.8333,
    "percent_ripple": 5.0341
  },
  "working": "C=10000 µF=0.010000 F. For half-wave, f=60 Hz. Vripple=I/(f×C)=0.50/(60×0.010000)=0.50/0.60=0.833333 V peak-to-peak. Vpeak=12×sqrt(2)=12×1.41421356=16.970563 V. Vdc=Vpeak−Vripple/2=16.970563−0.833333/2=16.970563−0.416667=16.553896 V. %ripple=100×0.833333/16.553896=5.0341%."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json