Dim Bulb Tester Project

[EdStraker]

Need some input (no pun intended) on this next project. There are as many schematics as there are versions of this out there. But there is a lack of information as to component choice for the build based on what it will be used for.

I plan on doing a 3 bulb variety and have ordered some of the parts but no one really explains or goes into detail on the following:

Protection Fuse/Breaker:
Some folks use 1.5A others use 3A and still others 5A. I have done some power consumption research on audio equipment Tube and SS and I find that some of the larger amps and receivers have fuses that are as high as 8A. What to choose??

Toggle Switches:
Not a real big deal here but I ran across a guy with 40y+ Exp. (radio and TV repair) who built one using miniature switches. I have a bunch of the these which would be nice to save a buck or two. However, these type of switches seem to be rated between 2A - 5A.
Are these actually safe to use in this application?

Schematic is a pencil sketch at the moment so I can't post it right now. But any help would be appreciated.

 

[ZipZapOuch]

Schematic is a pencil sketch at the moment so I can't post it right now.

I don't understand that logic at all. Take a picture with your phone and post the pencil sketch.

 

[EdStraker]

 

[Diver300]

I think that you should have the output lamp in parallel with the output, not in series.

If any of the SPST switches are on, the limit lamp will illuminate when the bypass is on.

If the load isn't very big the bypass lamp will illuminate when the limit is being used.

 

[AnalogKid]

Breaker: If you want tight protection, you will meed multiple breakers in parallel. Close only the one that matches the load current you need.

Switches: A 2 A switch never should be used to control a 8 A load.

ak

 

[EdStraker]

I think that you should have the output lamp in parallel with the output, not in series.

If any of the SPST switches are on, the limit lamp will illuminate when the bypass is on.

If the load isn't very big the bypass lamp will illuminate when the limit is being used.

I want the output lamp lit in bypass or limit. But I see your point.
bypass lamp in series between SPDT and VM?