LDM #435: Air data Converter Unit

Analog board schematic

ACU_ANALOG_A

CPU board schematic

ACU_CPU_A

LDM #454: Boeing 727 Interface Fuel Flow

Posted by on Avr 15, 2026 in Non classé | 0 comments

Schematic diagram:

LDM454_SCH

Code (Z80 assembly)

code

LDM #453: Mysterious Military Electronics Unit

Posted by on Avr 11, 2026 in Non classé | 0 comments

Assembly code (achive zip):

code_saab

Schematic diagram:

IMG_5467

LDM #447: Angle Of Attack indicator Teledyne Avionics SLZ9680-3

Posted by on Fév 25, 2026 in Blog | 0 comments

Schematic diagrams:

LDM447_A1_A

LDM447_A2_A

Servo amplifier calculations:

Servo_Calculations

LDM #446: Distance Bearing Indicator DB-100 Sperry Aviation Part 1: Compass card and pointers

Posted by on Fév 19, 2026 in Non classé | 0 comments

Schematic diagrams:

DB-100-A

servo_amplifier

servo_monitor

LDM #439: Boeing 777 Cabin Pressure Control System

Posted by on Déc 14, 2025 in Blog | 0 comments

Schematic diagram of pressure transducer:

sch

LDM #437: Boeing EGT Indicator – Teardown, Reverse Engineering and tests

Posted by on Déc 8, 2025 in Non classé | 0 comments

Schematic diagram:

LDM437_Sch

LDM #434: Marker receiver DECCA RM671 and CRM.555 generator modification

Posted by on Nov 18, 2025 in Non classé | 0 comments

Schematic diagram:

RM671_A

Source code:

Code_Marker_Demodulator_A

LDM #433: Horizontal Situation Indicator Aeronetics HSI-421D Part 2

Posted by on Nov 13, 2025 in Blog | 0 comments

Schematic diagram:

HSI-421D_Digital_Board_A

Code:

files code_D8751H

 

LDM #426 : France Aerospace BDHI ID182A – Part 2: final tests

Posted by on Sep 28, 2025 in Non classé | 0 comments

Full schematic diagrams:

LDM426_SCH_A

LDM #422: Barr and Stroud military low light camera – Part 1: teardown and deflection circuits

Posted by on Août 29, 2025 in Non classé | 0 comments

Schematic diagrams:

Scan_Video_Amp_A

Video_Amp_A

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