Tír Na HiFi

rickmcinnis wrote:I am really confused here.

Are Nigel and Randy making their own REGENs or does this apply to the REGEN?

Yes, it's relatively easy - I did it a while back (at the previous get-together before the last one posted about here).

A USB2412 chip + 24Mhz clock on an adapter board & a bit of soldering care is all that's need. Oh & a good 3.3V supply - guess what I use :)

Thanks for the assurance.

Those two are relentless. Wish I could say the same thing about myself!

rickmcinnis wrote:Thanks for the assurance.

Those two are relentless. Wish I could say the same thing about myself!

No me, I'm just trying to sort of, kind of keep up with Nigel.

I wanted to try the Regen, but can't spend the money right now, so this gives me a low budget way to try something like a regen.

randytsuch wrote:

rickmcinnis wrote:Thanks for the assurance.

Those two are relentless. Wish I could say the same thing about myself!

No me, I'm just trying to sort of, kind of keep up with Nigel.

I wanted to try the Regen, but can't spend the money right now, so this gives me a low budget way to try something like a regen.

there's more options building your own and at less cost, i seen jk's at the last meetup and after i heard the battery mod on the regen it was certainly on the agenda
anyway if i got a regen id only end up modding it

I got my little adapter pcb from china in the mail yesterday, and by coincidence also received the low temp solder paste I just ordered.

But I looking at the web for ideas to solder the qfn, and saw a good suggestion for the ground pad, which is the most challenging part of the qfn. It said to drill a small hole in the pwb, under the qfn. This will leave the pad exposed so you can get to it.

So that's what I plan to do, drill out the adapter pcb, and then I can solder directly to the ground pad. I'll probably use a small strip of copper tape.

May not end up needing the solder paste at all.

Randy

randytsuch wrote:I got my little adapter pcb from china in the mail yesterday, and by coincidence also received the low temp solder paste I just ordered.

But I looking at the web for ideas to solder the qfn, and saw a good suggestion for the ground pad, which is the most challenging part of the qfn. It said to drill a small hole in the pwb, under the qfn. This will leave the pad exposed so you can get to it.

So that's what I plan to do, drill out the adapter pcb, and then I can solder directly to the ground pad. I'll probably use a small strip of copper tape.

May not end up needing the solder paste at all.

Randy

Yep, that's a good idea, Randy & when soldered, attach a strip of copper to it that runs the length of the adapter board. This provides a number of functions - it's a nice low impedance ground connection; it acts as a ground plane for the high frequency 480MHz USB signals on the traces on top of the board; it acts as a convenient place to connect to ground for caps & any pins that directly need grounding

jkeny wrote: Yep, that's a good idea, Randy & when soldered, attach a strip of copper to it that runs the length of the adapter board. This provides a number of functions - it's a nice low impedance ground connection; it acts as a ground plane for the high frequency 480MHz USB signals on the traces on top of the board; it acts as a convenient place to connect to ground for caps & any pins that directly need grounding

That's what I was thinking, make a little ground plane on the adapter card.

started into making a usb hub to i2s device with the caps divider mod
then soon realised i didnt have any caps in cira 100pf range
ended up just popping in two 1nf to see if it would work
and it does
it is recognised by pc but i havent listened to it

what effect is the capacitance value?

capacitance only affects the current passed - shouldn't be a problem @ 1nF

jkeny wrote:capacitance only affects the current passed - shouldn't be a problem @ 1nF

i thought that was it
but that only sets the maximum current
thats why i was wondering
why it would matter in comparison direct from clk powered at 1.8v