|
Home | Forums | Rules | Articles | diyAudio Store | Blogs | Gallery | Wiki | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
![]() |
|
Thread Tools | Search this Thread |
![]() |
#5241 |
diyAudio Member
Join Date: Jul 2011
Location: Sofia, Bulgaria
![]() |
Hi, I have a question about the current. I have built a v1.1 5V shunt ment for low current (10mA) but I decided to give it to a person who wants to use it for currents like 500mA and a little more (say 600-700). For how much current can the v1.1 work?
|
![]() |
![]() |
#5242 |
diyAudio Chief Moderator
|
For as much as the safe operation area of the Mosfets used, the sinking, and the ambient temperature allow. Its about dissipated power so voltage is as much important as current.
An example of a 5V reg biased at 1A would need 1.5C/W common sink for both Mosfets. |
![]() |
![]() |
#5243 |
diyAudio Member
|
Hi Salas, I want purchase some R-core txs from Selectronic, but by the photos they are all
center tapped (they have 3 output wires).Can I divide phisically the secondary to get two indipendent ones? ... desoldering the two wires that form the central tap? Ciao, Orazio |
![]() |
![]() |
#5244 |
diyAudio Member
Join Date: Sep 2009
Location: Catalonia - Europe
|
Selectronic R-Core aren't center taped, input are phase, neutral & 3rd wire gnd is electrostatic shield, outputs are almost all transformers dual secondary with 4 wires.
Ciao Felipe |
![]() |
![]() |
#5245 |
diyAudio Member
|
Muchas gracias Felipe, I'm confused by the photo of 50VA, there are 3 big wires(white,yellow and black),I thinked they are the secondary ones, and 4 little ones
that I thinked the primary ones. Ciao, Orazio |
![]() |
![]() |
#5246 |
R.I.P.
Join Date: Jul 2004
Location: Scottish Borders
|
to be absolutely sure ask the retailer what the wires colours are and how to connect up.
As a back up safety measure, use a bulb tester for mains power up. Then you can check voltages without damaging the transformer. BUT !!!!!! if you wire it back to front, then the secondary voltages will be enormous, maybe way over 1kVac. So sort out the wires colours first.
__________________
regards Andrew T. |
![]() |
![]() |
#5247 | |
diyAudio Member
Join Date: Sep 2009
Location: Catalonia - Europe
|
Quote:
![]() Buon lavoro, Felipe |
|
![]() |
![]() |
#5248 | |
diyAudio Member
Join Date: Sep 2009
Location: Catalonia - Europe
|
Quote:
![]() |
|
![]() |
![]() |
#5249 | |||
R.I.P.
Join Date: Jul 2004
Location: Scottish Borders
|
Quote:
Quote:
Quote:
Is he a danger to him/herself? Should we be helping this person to kill themselves?
__________________
regards Andrew T. |
|||
![]() |
![]() |
#5250 |
diyAudio Member
Join Date: Sep 2009
Location: Catalonia - Europe
|
Thick 3 wires primary, thin 4 wires secondary.
|
![]() |
![]() |
Thread Tools | Search this Thread |
|
|
New To Site? | Need Help? |