Hi everybody and thank you for any and all helpful input,
For those unfamiliar with switchback led's, they are led's with 2 different colors they can switch back and forth between commonly used in a white/amber application for vehicle running lights/turn signals. Most are 3157, 7443, or 1157 which allows ground, and 2 different power inputs for the 2 different colors. I have those currently in my parking light and fog light housings on my truck, and I'd like to add a set of switchbacks to cab roof lights. The housings accept a 194 bulb. With 194's being only a 2 input bulb, they switch between amber and white by reversing the polarity. A thread on a different forum provided a useful diagram using dpdt relays. I'll include the diagram in an attachment. I have two things I don't understand though. First, I'd like the lights to be sequential turn signals. There are 5 lights across the roof like so: 1 2 3 4 5. With the right signal activated it would light 3 amber - 2 amber - 1 amber, then all back to white (or off if parking lights are currently off). The left signal would go 3 4 5 amber respectively. Hazard lights would start from 3 and sequence outwards both ways. What I'm unsure of is first how to create this sequencing effect and how to safely add middle light number 3 to both sides.
There is another thread on this forum regarding these bulbs but in a different application. it can be found here: https://forum.allaboutcircuits.com/...it-plus-more-relays-capacitors-diodes.127528/
If this proves to be not reasonably possible, my other idea is to bore out the light housings large enough to accept a 3157 bulb and hardwire the bulbs as there wouldn't be enough room for a socket. The wiring with 3157 bulbs would be would be easier I imagine, as there is no reverse polarity to deal with. Whether white (minor) is on or off, amber (major) takes precedence when activated, so the middle bulb could be tied to both sides with diodes I believe. With this option, I am still unsure the best way to create the sequential effect. I am very excited about this project and think it will be the first of it's kind. Again, thank you to everyone for their time and useful advice to either the 194 or 3157 set ups.
For those unfamiliar with switchback led's, they are led's with 2 different colors they can switch back and forth between commonly used in a white/amber application for vehicle running lights/turn signals. Most are 3157, 7443, or 1157 which allows ground, and 2 different power inputs for the 2 different colors. I have those currently in my parking light and fog light housings on my truck, and I'd like to add a set of switchbacks to cab roof lights. The housings accept a 194 bulb. With 194's being only a 2 input bulb, they switch between amber and white by reversing the polarity. A thread on a different forum provided a useful diagram using dpdt relays. I'll include the diagram in an attachment. I have two things I don't understand though. First, I'd like the lights to be sequential turn signals. There are 5 lights across the roof like so: 1 2 3 4 5. With the right signal activated it would light 3 amber - 2 amber - 1 amber, then all back to white (or off if parking lights are currently off). The left signal would go 3 4 5 amber respectively. Hazard lights would start from 3 and sequence outwards both ways. What I'm unsure of is first how to create this sequencing effect and how to safely add middle light number 3 to both sides.
There is another thread on this forum regarding these bulbs but in a different application. it can be found here: https://forum.allaboutcircuits.com/...it-plus-more-relays-capacitors-diodes.127528/
If this proves to be not reasonably possible, my other idea is to bore out the light housings large enough to accept a 3157 bulb and hardwire the bulbs as there wouldn't be enough room for a socket. The wiring with 3157 bulbs would be would be easier I imagine, as there is no reverse polarity to deal with. Whether white (minor) is on or off, amber (major) takes precedence when activated, so the middle bulb could be tied to both sides with diodes I believe. With this option, I am still unsure the best way to create the sequential effect. I am very excited about this project and think it will be the first of it's kind. Again, thank you to everyone for their time and useful advice to either the 194 or 3157 set ups.
Attachments
-
398.4 KB Views: 34