Super Regulator

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#529
Hi...

I just ordered the super regulator boards...I will run one of them at 5 volts out.

From my readings...the voltage reference which is shown as lm329 or 6.9v should be changed to an lm 4040 2.5 volt reference.

Then there is d2 which is a 6.8v zener...It looks like this should be changed to a 2.5v zener or perhaps two red leds in series...

Do I understand correctly?...thanks
 
#531
audionut said:
Hi...

I just ordered the super regulator boards...I will run one of them at 5 volts out.

From my readings...the voltage reference which is shown as lm329 or 6.9v should be changed to an lm 4040 2.5 volt reference.

Then there is d2 which is a 6.8v zener...It looks like this should be changed to a 2.5v zener or perhaps two red leds in series...

Do I understand correctly?...thanks
Click to expand...

So, this is what I did: 5V in 5 moves

1) D5 & D10 LM4040AIZ-2.5/NOPB
2) R5 & R12 2.5 k
3) R2 & R9 5k
4) U1 & U2 AD817
5) D2 & D7 Replace with two red led in opposite direction of the zener in the schematic

According to my understanding the reasoning is the folloiwing:

1) To have a lower voltage reference
2) To have enought current through D5 and D10
3) To have enought current through D1 and D6
4) You need an opamp that can work with a single 5V rail
5) You need the output of the opamp to be around 3.1V as explained in post #498

I had to put a 10k resistor in parallel with R6 and R13 to get closer to 5V, otherwise I had 5.2 V.

Enjoy,

Davide
 
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#534
dvd7900 said:
Jan
Thanks for putting these boards out there
Waiting for more stock to arrive
Any E.T.A. ??


Also curious as to why the ground plane was omitted from current version


Thx
Click to expand...

I'm not involved in any way in the provision or ordering of these boards, I just gave my updated design to the diyaudio powers.

I deleted the gnd plane because I wanted to control the run of the currents through tracks rather than guessing where they would be on the ground plane.
I thought about using a gnd plane connected to a single gnd point, sort of like an electrostatic shield, but I doubt that it would do anything for audio, while it had the danger of introducing unwanted capacitance between nodes and ground.

Jan
 
#535
Nikon1975 said:
So, this is what I did: 5V in 5 moves

1) D5 & D10 LM4040AIZ-2.5/NOPB
2) R5 & R12 2.5 k
3) R2 & R9 5k
4) U1 & U2 AD817
5) D2 & D7 Replace with two red led in opposite direction of the zener in the schematic

According to my understanding the reasoning is the folloiwing:

1) To have a lower voltage reference
2) To have enought current through D5 and D10
3) To have enought current through D1 and D6
4) You need an opamp that can work with a single 5V rail
5) You need the output of the opamp to be around 3.1V as explained in post #498

I had to put a 10k resistor in parallel with R6 and R13 to get closer to 5V, otherwise I had 5.2 V.

Enjoy,

Davide
Click to expand...

Nothing wrong with your reasoning. I probably would have chosen a 4040-5 V ref, and bridge one of the feedback resistors, but that's just personal choice.

Jan
 
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