Is there such a thing as a bi-directional LED where each polarity is the same color?
I can find plenty of 3mm LED's where each direction is a different color (bi-color), such as: but none where both directions are the same color (bi-directional).
I'm replacing about six 4PDT 24VDC 5A contact relays used in a Shizuoka ST-N vertical mill with a Bandit controller. The old relays do NOT have any LED's wired across the coils. However, every replacement relay I was able to find has an LED across the coil. The series resistor is 5.0K. The problem is that the (defacto??) standard for the polarity of the DC relay coil needed to light the LED is the reverse of how the controller is wired.
It's a moderately easy fix to open the relay and reverse the LED polarity. However, I thought it might be nice to have the LED work with either polarity. Different colors for each direction are an option but I don't want to receive any confusing questions because these relays will be used on multiple machines, some of which are wired for standard polarity relays. I could cram in 2 LEDs back to back, if there's room. I could just remove the LED's like in the original relays. However, I prefer the more elegant bi-directional LED if available.
Any clues as to a source?