I am currently working on a project involving a central command module which has two light stacks to display the mode of the machine.
The initial problem i am struggling with ideas for is the fact that an LED can fail open or short, when it fails open a comparator circuit could be used to detect the voltage drop across the LED, if an LED fails short how can that failure be detected?
The second problem is: can the failure be detected by using the control signals from the command bay to the light stack and the neutral returning wire, or does the circuit require modifications to the light stack such as mounting a circut with inputs from either branch of each LED?
I will upload a schematic later. For reference the light stack is AEUR modul70
Thank you in advance
- The light stacks each have four modules each with a different coloured led inside wired in parallel to eachother.
- The light stacks are powered by four(one per led) 230Vac wires coming from the command bay connected to an internal power supply, this supplies the LED's with 24Vdc.
- There is one returning neutral.
- The lights are 15 meters from the command module
The initial problem i am struggling with ideas for is the fact that an LED can fail open or short, when it fails open a comparator circuit could be used to detect the voltage drop across the LED, if an LED fails short how can that failure be detected?
The second problem is: can the failure be detected by using the control signals from the command bay to the light stack and the neutral returning wire, or does the circuit require modifications to the light stack such as mounting a circut with inputs from either branch of each LED?
I will upload a schematic later. For reference the light stack is AEUR modul70
Thank you in advance