Tibi, not sure if I can track down an ESR meter. With regard to your method, however, shouldn't the use of the resistors not be needed if I have a constant current power supply? That's really all the resistors are doing in this case - insuring a small current to the caps during the forming process.
In fact resistor will act like a variable ccs. While the voltage is dropping the current will drop as well protecting the cap from overheating.
Regards,
Tibi
APK,
Document was updated to include these descriptions, version 1.6 - see page 8
https://docs.google.com/document/d/1vlabZc_1If3x12ox2A5ECZxC0HLGnuOWdM-j9X4b7Q0/edit#
Regards,
Tibi
Document was updated to include these descriptions, version 1.6 - see page 8
https://docs.google.com/document/d/1vlabZc_1If3x12ox2A5ECZxC0HLGnuOWdM-j9X4b7Q0/edit#
Regards,
Tibi
I have the power supply and will be doing the cap forming maybe tonight or tomorrow. The HP supply is a variable DC supply that can be set for constant voltage / constant current, but I'm not sure that's what I want to do.
I was thinking of setting up a cap with the 100KOhm resistor in series and then ramping up the voltage slowly until I get to 50 VDC. Or should I just set the voltage to 50 VDC, turn off the supply, hook everything up, and turn it back on?
Ι ve been trying to see how to upgrade the psu parts.
Where would you reckon would be the best place to ground the separate Vs?
Which V powers the motor driver?
Thanks again
Dimkasta,
For separate Vs best place to ground is main board ground input - connector J5 Dout GND.
Motor driver need 8V. J6 connector is 8V.
Regards,
Tibi
V1=V2=V3=V4=5V
For V1 current should be between 30mA and 60mA or more depending on disk type (CD,CD-R or CD-RW) and speed. An 150mA should be enough.
For V2 current is ~40mA. An 5V at 100mA should cover the need.
For V3 current is ~20mA or less. 50mA should be OK.
For V4 current is ~ 50mA. 100mA should be OK.
Regards,
Tibi
Last edited by a moderator:
I just bought a Blue ESR meter! Hope to have it by Saturday. Better safe than sorry. I want to show progress as quickly as possible Tibi
, but apart from the two Shigas on my plate I'm also trying to finish mods to my (vinyl) turntable and completing the construction of a constrained layer platform for same.
Well there are many other combinations as well. It´s up to your imagination how to combine them.
If you want to use separate 5V supply for V4, you need to remove L4 & L5 beads. Than, you can power the rest of Shiga via a separate 5V for V3 without removing L1, L2 & L3 beads.
Main 8V should be present as well via J6.
Hope is clear.
Regards,
Tibi
If you want to use separate 5V supply for V4, you need to remove L4 & L5 beads. Than, you can power the rest of Shiga via a separate 5V for V3 without removing L1, L2 & L3 beads.
Main 8V should be present as well via J6.
Hope is clear.
Regards,
Tibi
