The middle of a center tap transformer is always ground. You can rectify each of the other two leads with just a diode as illustrated in my link and this will give you a full wave. Your second picture will not work because there is no ground. Perhaps you do not understand how a center tap transformer works and should look it up.
The middle of a center tap transformer is always ground. You can rectify each of the other two leads with just a diode as illustrated in my link and this will give you a full wave. Your second picture will not work because there is no ground. Perhaps you do not understand how a center tap transformer works and should look it up.
I have a 24V transformer and two 12V transformers. I need some 24V current and as much 12V current as possible.
I need a common ground. If I connect the grounds, is it still going to work? I'm a bit paranoid, because a cap just blew up in my face the day before yesterday, though I don't think the circuit was exactly like this.
I have a 24V transformer and two 12V transformers. I need some 24V current and as much 12V current as possible.
I need a common ground. If I connect the grounds, is it still going to work? I'm a bit paranoid, because a cap just blew up in my face the day before yesterday, though I don't think the circuit was exactly like this.
If you have separate transformers, why are you showing a schematic with just one transformer?
Just connect the 24V transformer to a single bridge rectifier and the 12V transformers to a different single bridge rectifier.
To maximize the current you can connect the output of the two 12V transformers in parallel or run each output to it's own bridge rectifier.
If you run the transformers in parallel you have to make sure they have the same phase output; if they are opposite phase they will blow. (Check the phase by connecting one lead from each transformer together. Check the AC voltage between the other leads. It should read near 0V. If not reverse the leads to one of the transformers.)
You can connect all the bridge outputs to a common ground as long as none of the transformer outputs are grounded.
The two bridge rectifiers on the 24 V transformer combine to give you 24 V on the 12V line.
I have shown one of the current paths on my drawing. There are other problems as well. It is generally not a good idea to have more than one rectifier on one transformer.
The voltages will be different, sometimes double, sometimes half, of what you expect. Sometimes the voltages will be near zero until the magic smoke escapes from one or more diodes or transformers.
Keep the circuit simple enough to understand. There is no reason to make complex diode circuits. The experts don't do it, and there is even less reason for the novice to do so.