DC in to reg goes +1.87 so it gives bit less internal CCS capacitance but +heat on the sinks also. So the slight Vo dif must be due to the temp dif.
Reflektor-D should work well with WAVEIO?
And what power supply better is suited to the DAC CS4344, Salas SSLV1.1 BiB or the Reflektor-D?
And what power supply better is suited to the DAC CS4344, Salas SSLV1.1 BiB or the Reflektor-D?
Yep, it powers a 9023 DAC. You only have to consider Vout (the 2 led and diode thing), RR after measuring 2sk117 and ofcourse R1 for current setup (just see the table from the guide)
Easiest thing. Much better than lt1673 that came with the DAC.
I'll test it with Buffalo DAC too and see what happens, although many are against the shunt (tridents in this case) after shunt scenario.
No camera, no photos, no problem 🙄
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Is it alright if I cheat a bit?
Having just, I think, relieved Tea-Bag of the last two boards, I'm planning to use one Reflektor-D to power a TPA Buffalo IIISE, needing 5.25V. I think one or two here have already gone through choosing R1, leds etc. for this DAC and just wondering if someone is prepared to share the info?
I have pondered that too but I think I've seen enough positive comments about using the Reflektor-D in that situation to make it worth doing. Perhaps those who are doing it can advise on their outcomes?
Ray
Having just, I think, relieved Tea-Bag of the last two boards, I'm planning to use one Reflektor-D to power a TPA Buffalo IIISE, needing 5.25V. I think one or two here have already gone through choosing R1, leds etc. for this DAC and just wondering if someone is prepared to share the info?
I have pondered that too but I think I've seen enough positive comments about using the Reflektor-D in that situation to make it worth doing. Perhaps those who are doing it can advise on their outcomes?
Ray
What shunt current did you settle on (assume Buffalo IIISE load is 440mA plus n shunt current)?
What current setting resistor (R1 as I recall) did you settle on?
What voltage setting combination (leds, resistors/diodes) did you settle on?
I could easily experiment myself but if someone has already invented this particular wheel....
Thanks
Ray
Hi Ray,
-I used the two DALE CPF3 2R and 1R5 in parallel 0R85 for R1, 0.6/0.85=0.75 (My BIII burn more power). But for you BIIISE R1 you have to use 1 ohm, CCS(A)=0.61V/R1, so 610mA using 9VAC transformer.
-Rx/J/D 100R + two green LEDs (one LED 1.904V the other LED 1.903V)
Could you drive now?
Cheers
Felipe
I'm doing the same thing but I have one other question. How do I figure out how many VA the transformer needs to be?
Primary would be 115 Vac
Secondary would be 9Vac
I would need 5.25 Vdc at 550 mah from the Reflektor-D
Primary would be 115 Vac
Secondary would be 9Vac
I would need 5.25 Vdc at 550 mah from the Reflektor-D
Say you set the CCS at 750mA that is 7.5W at 10V raw DC level. At least three times that to have a cool running not ducking much under high constant current load trafo. Thus the 30VA spec mentioned in the guide covers all situations richly.
Thanks... Now if the transformer is 30 VA with dual secondaries I have to combine them for all of that power correct?
Well Salas you should not even need to do that ...9v ac would give 12V after rectifier ( my case )...even if you used 1A that would be 12W real power for each winding.
So as you say both windings in parallel will be over the top current capability for this application.
One winding of a 30VA PF dual winding trafo for 5.25V Reflektor D for BIII barely gets warm after hours on a test load ( open air conditions, i should say !).
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Tea-Bag only sent them on their way a couple of days ago so I have to be patient for now but I will update in due course.
I'm planning to use one Reflektor-D for the Buffalo IIISE and another to power a Beaglebone Black/TPA Botic combination and I'll need to sort out the settings for this one sometime. I asked some questions of Salas a while back concerning the Beaglebone and, despite his feedback I'm still concerned about the variability of load represented by the BBB, specifically the amount of current the Reflektor-D will need to burn when the Beaglebone is idling compared with peak load (the former might be only 350mA and the latter maybe 750mA, though I think the highest peak will only be at boot-up, all at 5V of course).
It will need some work to iron everything out as the latest Botic Linux distribution for the Beaglebone sets the CPU speed higher, so more current required (but not clear how much yet) and the Botic is still only at prototype stage so working estimate of fairly steady 100mA Botic load at the moment.
I'll also be using Salas BIB supplies for the legato I/V stage.
Later...
Ray
I'm planning to use one Reflektor-D for the Buffalo IIISE and another to power a Beaglebone Black/TPA Botic combination and I'll need to sort out the settings for this one sometime. I asked some questions of Salas a while back concerning the Beaglebone and, despite his feedback I'm still concerned about the variability of load represented by the BBB, specifically the amount of current the Reflektor-D will need to burn when the Beaglebone is idling compared with peak load (the former might be only 350mA and the latter maybe 750mA, though I think the highest peak will only be at boot-up, all at 5V of course).
It will need some work to iron everything out as the latest Botic Linux distribution for the Beaglebone sets the CPU speed higher, so more current required (but not clear how much yet) and the Botic is still only at prototype stage so working estimate of fairly steady 100mA Botic load at the moment.
I'll also be using Salas BIB supplies for the legato I/V stage.
Later...
Ray
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You really should listen to SEN I/V with the BIII ...it's a completely different ball game.