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sorry , I just realised I never replied to this !!!! Thank you Klaussss and thunderdantheman for your help on this.
It's finally all working. I now have the 8 channel ADC and DAC VQ buffered to the preamps / line drivers and HP driver cards.
I have ADC and DAC VQ's biasing OPA1367...
was meaning do you think the differential op amp would work well for the main audio buffer/filter to the ADC?
how about TLV6001 to buffer VQ? only have 4 channel version.. maybe I can dead bug one onto the ADC board and just see if its noisey or not!
It would be nice if I could voltage follow...
Yes, VQ decoupling still there. I meant by 'bypassing' that I just soldered the DC decoupling cap legs together so there 6.3v 10uF decoupling caps are out of circuit.
It's both a combination of lack of detail in the datasheet and me still not that experienced at building analogue circuits.
I...
thanks thunderdantheman for your detailed explanation :)
yes , I had presumed the decoupling caps for VQ are required.
I had not understood CS5368 analogue inputs need to be DC biased in order to function correctly at full voltage swing.
I connected PGA2500 VCOM to VQ and bypassed the...
Hi Klaus,
PGA2500 -> 10uF cas --> CS5368
I have PGA2500 VCOM tied to GND
I was following pga2500 datasheet
Figure 8. PGA2500 Analog Output to ADC Analog Input Interface, AC-Coupled
on CS5368 I tried leaving VQ with just caps to GND as in datasheet example.
I also tried VQ with VA/2 =...
Caps to decouple DC mismatch between preamp and adc?
10uF is the right cutoff, but I may change that. For now I want to be sure there is no DC mismatch or problem. I think the correct name is DC decoupling?
The 8 channel ADC gets very warm, about 55C and I'm thinking it might be working to...
I am using some electrolytic 10uF capacitors to hopefully filter DC bias that exists between an ADC and a digitally controlled preamp chip.
PREAMP -> ADC INPUT
The preamp, TI pga2500 sergests using capacitors to decouple the preamp output from the ADC.
The output of the preamp and input of...
sorry c_mitra. yes thanks , I tried to edit message above and it got messed up !
ebike load = 20A @ 37V 740W -> 10 series battery packs x 3.7V 20A 74W
going with betwixt I^2 * R
20A ^ 2 * 0.185ohm = 75
75 A ?
a fuse rating should be 4 x times the maximum load ? does that sound...
I have 8x cells in parralel to make 10 x 3.7v battery packs. Let's just see them as battery's that need some short circuit protection
Those battery packs will be in series and monitored with a BMS to make 36v nominal.
If I draw 100 amps at 36v each battery pack contributes 10 amps at 3. 6v or...
That's really good advise ! thank you !
I have a load instrument but I don't think it goes up to enough amps at 3.7v to blow the fuse.
I have to say I'm a bit confused with how I should calculate this.
If I have 36v made up from 10 x 3.7v battery packs.
If I draw 20amps at 36v from the large...
Yes I know. I assume there aren't many 3.7v 150A or 200A rated fuses out there?So I chose to discribe the fuse in W rating :)
Can I used a 12v 50A fuse as a 3.7v 187.5A fuse? Both 600W? Or do I have my ohms law wrong?
1610345797
Great solution, thanks. I should be able to find a blade socket to. I'll work out with ohms law what amps it is at 3.7v
12v 50A is probebly enough but cheap as chips to chnage
A home 110v breaker is quite large. I was Looking for a self reseting fuse. I want to keep the contacts as close to the metal strips that parralel the 8 x 18650 battery's as close to the contacts that will connect to the backplane as near as possibe. So large breaker there would be impossible. I...
yes, that makes sense.
10 x 36v battery packs monitored with a BMS is less parallel than 8x3.7v cell in parallel in every battery pack ?
So maybe since I need 36v min. I should go for slightly less mA hour 18650 cells and put 10 in series for each module.
that way I can get 36v 100Wh packs and...
I am making multiple 8 x parallel(lithium iron 18650 3.7v 3400mA) battery packs that should be under 100Wh capacity.
The individual cells are not protected for over current.
Each x8 cell pack will need some kind of short circuit protection >100A , 135A ( 500w )
The x8 cell pack has no...
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