Bunpei,
I have recently ordered the SDTrans and full SyncDAC set and am awaiting its arrival.
This has me thinking about power supplies.
Will you kindly share more details of the solar cell power supply?
In particular I would like to know more details regarding:
The modification of the panel to reduce the output to 10V
The krypton bulb arrangement
The shunt regulator
Best regards
Jeff
I have recently ordered the SDTrans and full SyncDAC set and am awaiting its arrival.
This has me thinking about power supplies.
Will you kindly share more details of the solar cell power supply?
In particular I would like to know more details regarding:
The modification of the panel to reduce the output to 10V
The krypton bulb arrangement
The shunt regulator
Best regards
Jeff
I appreciated your interest in a solar panel based power supply.
In this reply, I answer to some parts of your questions. In the next reply, I will provide additional pictures.
1. How to get 10V output
A solar cell panel I used was originally designed to output about 20 V. The whole unit consists two columns of small cell group connected in series. I cut a cross bar conductor between the columns and separated one unit into two units and connected them in parallel.
(In the next post, I will show you a photo.)
2. Shunt regulator
A basic schematic of the regulator is attached below. A well-experienced DIY builder would use more sophisticated Salas type discrete regulators.
In this reply, I answer to some parts of your questions. In the next reply, I will provide additional pictures.
1. How to get 10V output
A solar cell panel I used was originally designed to output about 20 V. The whole unit consists two columns of small cell group connected in series. I cut a cross bar conductor between the columns and separated one unit into two units and connected them in parallel.
(In the next post, I will show you a photo.)
2. Shunt regulator
A basic schematic of the regulator is attached below. A well-experienced DIY builder would use more sophisticated Salas type discrete regulators.
Attachments
The first picture shows a mechanical structures for bulbs and panels. Wood frames are suitable for making such a structure.
The second pictures shows a small assembly of shunt regulator board.
The third picture shows wiring on a panel. In the bottom, a cross bar conductor connection between two columns of solar cell groups is cut and wires are soldered on the cut points.
(The fourth picture shows a close-up of the part.)
I scraped a plastic sheet of the backside of the panel and cut the conductor plate in the middle.
In the case of the panel assembly shown in these photos, four columns of cell groups, each outputs approximately DC +10V, are connected in parallel. Approximately 400mA in total output is available.
This build is fully based on an original design by Mr. Ishida in Tokyo.
The second pictures shows a small assembly of shunt regulator board.
The third picture shows wiring on a panel. In the bottom, a cross bar conductor connection between two columns of solar cell groups is cut and wires are soldered on the cut points.
(The fourth picture shows a close-up of the part.)
I scraped a plastic sheet of the backside of the panel and cut the conductor plate in the middle.
In the case of the panel assembly shown in these photos, four columns of cell groups, each outputs approximately DC +10V, are connected in parallel. Approximately 400mA in total output is available.
This build is fully based on an original design by Mr. Ishida in Tokyo.
Attachments
Last edited:
Hello Bunpei
Have you the contact of Mr. Teramoto ,as you can see the address is not visible.
Thanks.
Hi Bunpei,
I have in my hands the SyncDAC. I did not purchase the I/V PCB from Tachyon because I have transformers that I can use.
I can see an example of how transformers can be connected to the PCB's here:
http://www.diyaudio.com/forums/digi...emory-card-transport-project.html#post3268357
I cannot make out the exact pin connections.
Is it possible for you to clarify using the SyncDAC connections for use with I/V other than Chiaki's I/V?
Kind regards,
Jeff
I have in my hands the SyncDAC. I did not purchase the I/V PCB from Tachyon because I have transformers that I can use.
I can see an example of how transformers can be connected to the PCB's here:
http://www.diyaudio.com/forums/digi...emory-card-transport-project.html#post3268357
I cannot make out the exact pin connections.
Is it possible for you to clarify using the SyncDAC connections for use with I/V other than Chiaki's I/V?
Kind regards,
Jeff
Hi, Jeff!
It's very nice to hear from an owner of Chiaki's DAC board.
Here are markings, CN13, CN14, CN2 and CN3 for 4-pin headers.
Let's assign pin #1 as the nearest pin located to those CN markings.
Pin #1, Pin #4 ___ GND
Pin #2 ___ in-phase of balanced output
Pin #3 ___ out-of-phase of balanced output
Is this explanation clear enough for you?
It's very nice to hear from an owner of Chiaki's DAC board.
Here are markings, CN13, CN14, CN2 and CN3 for 4-pin headers.
Let's assign pin #1 as the nearest pin located to those CN markings.
Pin #1, Pin #4 ___ GND
Pin #2 ___ in-phase of balanced output
Pin #3 ___ out-of-phase of balanced output
Is this explanation clear enough for you?
Hi Bunpei,
Thank you for your reply.
Both CN2 and CN3 headers are outputs for L Ch
Both CN13 and CN14 headers are outputs for R Ch
From the photo I linked in my last message, it appears the two outputs for each channel are paralleled before feeding into the transformer.
Is this correct?
Kind regards
Jeff
Thank you for your reply.
Both CN2 and CN3 headers are outputs for L Ch
Both CN13 and CN14 headers are outputs for R Ch
From the photo I linked in my last message, it appears the two outputs for each channel are paralleled before feeding into the transformer.
Is this correct?
Kind regards
Jeff
Yes, your guess is correct.
CN2, CN3, CN13 or CN14 is a merged output of 4 DACs at one side of ES9018.
As far as you use your transformer I/V, I think it's better for you to tie
CN2 & CN3 and CN13 and CN14 to obtain more power.
When you use an OpAmp-based I/V module, an output given by 8 DACs in parallel might bring too much current.
CN2, CN3, CN13 or CN14 is a merged output of 4 DACs at one side of ES9018.
As far as you use your transformer I/V, I think it's better for you to tie
CN2 & CN3 and CN13 and CN14 to obtain more power.
When you use an OpAmp-based I/V module, an output given by 8 DACs in parallel might bring too much current.
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Joined 2006
Member
Joined 2006
