I'm looking to build a powered bread board similar to the one here http://www.globalspecialties.com/pb505.php. And it seems that I've got stumped right off the bat. At the moment I'm looking at putting three transformers inside. Now the problem. I want to put all the rectifiers on one pcb and wondering if I could tie all the center taps onto the same ground plane or not? If so, should it also be tied to the enclosure?
The idea is to have one transformer Hammond 185C12 for powering internal gizmos. Another transformer Hammond 185D24 for my fixed voltages then another transformer Hammond 182S15 for high amp variables.
All these transformers will most likely be run off of 220V on the primary and will be set up for series on the secondary. Also, all non rectified voltage will be available to tie points on exterior of enclosure.
Just thought of another question about transformers that I had the other day. My original thought was to use a large 48V transformer and hook it up parallel to give 24V @20.82A (Hammond 182S24) then use a full bridge to give + and - supply options. I'v decided not to go this route but am still curious about how would I reference ground? I kind of like the other route better because it gives me more AC options outside the enclosure.
I'm thinking about either aluminum tread plate or stainless for the bottom and sides. Some sort of grilling for front and back and lexan on top. It will probably weigh a ton!
Well anyway here is the regulated supplies I'm thinking about so far:
Off of the large 30V transformer, 1 variable 10A and 2 variable 5A.
Off the 24V all fixed 5V 12V and 15V.
And a variable current source off of one, the other or both.
These will also have negative counterparts just in case.
I'm also thinking function generators, logic switches, and of course logic indicators. I like the idea of having a logic 0 and 1 indicated with 2 led's. not just one led on or off. Anyway it is about time for me to hit the sack, so I'v uploaded some screen shots of what little I have so far. I know the text is unreadable on the first bitmap, and there is nothing is showing a fuse (yet) but I'm about to fall asleep here, so that will have to wait till another day.
Thanks.
The idea is to have one transformer Hammond 185C12 for powering internal gizmos. Another transformer Hammond 185D24 for my fixed voltages then another transformer Hammond 182S15 for high amp variables.
All these transformers will most likely be run off of 220V on the primary and will be set up for series on the secondary. Also, all non rectified voltage will be available to tie points on exterior of enclosure.
Just thought of another question about transformers that I had the other day. My original thought was to use a large 48V transformer and hook it up parallel to give 24V @20.82A (Hammond 182S24) then use a full bridge to give + and - supply options. I'v decided not to go this route but am still curious about how would I reference ground? I kind of like the other route better because it gives me more AC options outside the enclosure.
I'm thinking about either aluminum tread plate or stainless for the bottom and sides. Some sort of grilling for front and back and lexan on top. It will probably weigh a ton!
Well anyway here is the regulated supplies I'm thinking about so far:
Off of the large 30V transformer, 1 variable 10A and 2 variable 5A.
Off the 24V all fixed 5V 12V and 15V.
And a variable current source off of one, the other or both.
These will also have negative counterparts just in case.
I'm also thinking function generators, logic switches, and of course logic indicators. I like the idea of having a logic 0 and 1 indicated with 2 led's. not just one led on or off. Anyway it is about time for me to hit the sack, so I'v uploaded some screen shots of what little I have so far. I know the text is unreadable on the first bitmap, and there is nothing is showing a fuse (yet) but I'm about to fall asleep here, so that will have to wait till another day.
Thanks.
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