The ARINC 429 bus protocol was proposed by the Airlines Engineering Committee in July 1977 and was published and approved for use in the same month. Its full name is the Digital Information Transfer System (DITS). The protocol standard specifies the requirements for digital information transmission between avionics equipment and related systems. ARINC 429 is … Read more
From: Michelle’s LabLDM #401: Boeing 747 digital fuel quantity indicator – teardown, reverse engineering and testIntroductionInterface DisplayLabel InformationConnectorPinout of the Aviation ConnectorOpening the InstrumentFrom Altera’s CPLD, EPM7160 1MHz Crystal OscillatorPower Board (LT1074)Reverse Engineering: Power SupplyPower SupplyReverse Engineering: Dimmer Circuits0-5V, 400Hz AC Voltage Rectification Comparison 8-bit Sent to CPLDReverse Engineering: ARINC 429 InterfaceOptocoupler (an ARINC 429 … Read more