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NexGen Flight Simuator NexGen: Hacking: Master Caution Panel - part 1. - Overview
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  • Author Author: phoenixcomm
  • Date Created: 6 Nov 2023 7:48 PM Date Created
  • Views 431 views
  • Likes 8 likes
  • Comments 2 comments
  • flight simulator
  • nexgen
  • diy cockpit
  • mcp23017
  • arduino mega 2560
  • can bus module
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NexGen: Hacking: Master Caution Panel - part 1. - Overview

phoenixcomm
phoenixcomm
6 Nov 2023

imageWell, here we go again, this Master Caution Panel has been decorating my lab since the 90s', and while doing a major cleanup of my worktable, I uncovered this panel, so thought to myself, why don't I put some words to my blog? Ok so here we go.
imageThere are 35 spots for lamps and 2 are broken or missing parts, which leaves me with 33 lamps to drive. While we are counting there are 30 switches. I think I am getting a migraine. LOL. Since the bulbs are #387 28V@ 1.0Watts or 35.714mA per bulb or 51.42 mA per indicator and 102.84mA for the four large indicators on the bottom which have 4 blubs each. So I will most likely drive them with 2 x MCP2017  which will be kept in a table. so each lamp will need 2 writes: one to turn a lamp on, and the second to turn the lamp off. 

Since the panel in non-transmissive, I can print the missing panel in PLA. 

Since there are only 30 switches, I will use 2 x MCP2017 which can generate interrupts though they will be driven by a Smitt Trigger and an RC filter.  

imageOne more thing: I also will be driving a Warning Alarm (Rocker Industries part number 571150), since the alarm requires 21-32 vdc at 0.1Amps, I will drive it from a relay.  I have extra room on one of the MCP2017 so I can use 2 pins one, and engage the other to release it.  The main relay has 2 contactors, B1 and B2 will be 2 opto isolators. 

CANaerospace: is a protocol that rides on the CAN-bus. 
CANids: TBD* To Be Determined.
CAN message format: TBD*

UPDATES: I think, I can get rid of the relays and just use 2 optoisolators.

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  • phoenixcomm
    phoenixcomm over 1 year ago in reply to DAB

    I have had this panel for maybe 30+ years!! I have to relabel all the lamps and make my Master Caution Panel. Sort of useless now but I will make do. and besides one of the big panel guys are here in Fort Worth. Maybe they can give me some guidance. ~~Cris (BTW maybe I will post the rear pic Au too, all Micro Switches

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  • DAB
    DAB over 1 year ago

    Nice unit, lots of possibilities for it.

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