I'm building an adjustable regulator (1.2-25V @ 5A) and want (if possible) an illuminated on/off switch. This switch will be connected to the mains, likely in between the fuse and transformer.
I bought a 3-prong spst illuminated switch at radioshack, it's rated for 10A @125VAC. Prong #3 is "gold" (copper). The diagram on the packaging indicates prong 1 is for ac in and that prong 3 is for neutral, also indicating that prongs 1 and 2 are connected by the switch and that the lamp is between prongs 2 and 3 and that prong 3 is also tied to the switch.
However I'm having trouble figuring out the right way to wire it. It seems like no matter what position the rocker is the connection between 1 and 3 and between 2 and 3 is "open." I figured that it probably has to do with the forward voltage of the LED in the switch, but I tried tripping this using a 12V battery with no luck.
I just don't know if I'm supposed to assume that the connection between 1 and 3 will be made when the switch is hooked up to mains? Also, what is prong #2 for? Right now it's the only prong that's actually working as a switch but will it power the light? For clarification I want the light to be off when the power supply is off and on when the supply is on. The diagram doesn't name prong #2 at all, while prong #1 is receiving from mains, and prong 3 is going to load.
Seeing as I'm making a thread I have another question, is a 2.5A fuse good enough to place between the transformer and mains to trip if the 5A 25vdc regulator circuit somehow shorts?
I bought a 3-prong spst illuminated switch at radioshack, it's rated for 10A @125VAC. Prong #3 is "gold" (copper). The diagram on the packaging indicates prong 1 is for ac in and that prong 3 is for neutral, also indicating that prongs 1 and 2 are connected by the switch and that the lamp is between prongs 2 and 3 and that prong 3 is also tied to the switch.
However I'm having trouble figuring out the right way to wire it. It seems like no matter what position the rocker is the connection between 1 and 3 and between 2 and 3 is "open." I figured that it probably has to do with the forward voltage of the LED in the switch, but I tried tripping this using a 12V battery with no luck.
I just don't know if I'm supposed to assume that the connection between 1 and 3 will be made when the switch is hooked up to mains? Also, what is prong #2 for? Right now it's the only prong that's actually working as a switch but will it power the light? For clarification I want the light to be off when the power supply is off and on when the supply is on. The diagram doesn't name prong #2 at all, while prong #1 is receiving from mains, and prong 3 is going to load.
Seeing as I'm making a thread I have another question, is a 2.5A fuse good enough to place between the transformer and mains to trip if the 5A 25vdc regulator circuit somehow shorts?