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PCB
An externally hosted image should be here but it was not working when we last tested it.
This autorouter thing doesnt seem to care about any stargrounding
And differend thickness of the rails and stuff..
Does anyone know how I set it up for just 1 layer?
Eagle that is.
Hi,
yo have three star grounds chained through each other to the output. Wrong.
You must take each star ground via it's own route to the output.
You must manually draw all those stars into each of the separate grounds and manually attach each star to the output.
This may require the whole layout to be opitmised to enable the grounding to work correctly and then you may have to do the same to get the output line to connect correctly.
The auto router and auto schematic do not understand the difference between 0r0+0H0+0F0 and real trace impedances.
You may have to move C1 to connect the input pin of the reg to the A end of R3. Allow for this in your PCB.
yo have three star grounds chained through each other to the output. Wrong.
You must take each star ground via it's own route to the output.
You must manually draw all those stars into each of the separate grounds and manually attach each star to the output.
This may require the whole layout to be opitmised to enable the grounding to work correctly and then you may have to do the same to get the output line to connect correctly.
The auto router and auto schematic do not understand the difference between 0r0+0H0+0F0 and real trace impedances.
You may have to move C1 to connect the input pin of the reg to the A end of R3. Allow for this in your PCB.
If U R using a dual secondary transformer, then your regulators should both be LM317s. This ensures similar properties for both the supplies.
The circuit will be two duplicated positive regulators and ...
the positive o/p of the second regulator will become ground.
This is better than the one with the center tapped transformer and using 317 and 337.
Gajanan Phadte
The circuit will be two duplicated positive regulators and ...
the positive o/p of the second regulator will become ground.
This is better than the one with the center tapped transformer and using 317 and 337.
Gajanan Phadte
See here
This is not a regulator but will give you an idea (of a star).
Locate your filter caps conveniently for the star connection. Make the biggest cap as the star-center. Use individual, thin tracks for the regulator and ripple eliminator GNDs but incoming and outgoing tracks should be thick.
Design only one layout and duplicate.
Post your design.
Gajanan Phadte
This is not a regulator but will give you an idea (of a star).
Locate your filter caps conveniently for the star connection. Make the biggest cap as the star-center. Use individual, thin tracks for the regulator and ripple eliminator GNDs but incoming and outgoing tracks should be thick.
Design only one layout and duplicate.
Post your design.
Gajanan Phadte
Ryssen said:
Route the important traces manually. Start with ground, in star fashion.
When you start the autorouter in Eagle, it asks you for the preferred directions on each layer. Set bottom to "*" and all others to "N/A" for completely single-sided autorouting. You will however have to help by manually placing jumpers, ripping up hopeless dead-end traces and restarting auto a couple of times.
Alternatively, try a 2-layer design with a high cost for "top" (on the "Route" tab in the autorouter startup dialog) so that Eagle will "design" the jumpers for you. The control files singlesided_h.ctl / siglesided_v.ctl will set things up like that. You'll find them along with a sample board file in (Eagle program directory)\projects\examples\singlesided. Use "Load ..." in the autorouter start dialog to read these files.
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