I have been using the Kester 951 and like it, but some might like flux that is more gooey. I spilled a bottle the other day though, not brilliant near a furnace. Better to invest in a applicator bottle that has a needle, vs the open bottle and the big eyedropper thing. Or maybe a medical syringe with sharp end chopped off? The type of iron with a nice plated tip is working great for me SMD, and with a larger tip than you would imagine - holds heat better. I seem to fall into the higher heats category but have been at it decades and know how to do it. I'm finding with just leaping into SMD, the flux ala carte is a huge help. Maybe I need a hollow tipped iron and a flux-pump ? [joking] The flux cleans, but I think it must help migrate heat a bit, no? Often I end up holding the tiny caps with my finger, if I get burnt then maybe it was too much heat. Soon I will dig out my PCB vice. I have the damp sponge but usually wear jeans and clean the tip on my leg too, stays hotter.
I'd like to see that. Not easy to do !
The socket isn't great but it's intended as a temporary way to let me evaluate different xo's.
I've changed C1 - I'll try 2nF ....if no-one objects ;-)
An externally hosted image should be here but it was not working when we last tested it.
You can separate the 1.2v from the 3.3v if you wish. And even power the clock with another supply. The only supply that cannot be separated is the left AVCC from the right AVCC.
No one is expecting this board to beat the Buffalo DAC or the Acko DAC. And no one is taking any merit away from those two superbly designed DACs. There is space for every price point, and this an excellent platform to experiment and learn.
No one is expecting this board to beat the Buffalo DAC or the Acko DAC. And no one is taking any merit away from those two superbly designed DACs. There is space for every price point, and this an excellent platform to experiment and learn.
Misunderstanding guys - what I think - you can't separate the digital and analogue 1.2V from each other.... the routing division is under the IC.... so you'd need to desolder the IC, and then have a look. I have a friend who can do that but it's way beyond me. Everything else seems possible.
yes well actually I find both liquid and tacky flux have their purpose. liquid, with applicator bottle is good for running up large IC sides and the stickier stuff applied with a stick or small pallet can help to hold it in place till you tack the corners down; as well as its normal function. yes it helps migrate the heat but mainly because it helps the metal to flow.
stay away from the sponge IMO, grab yourself some brass wool wet sponges oxidise the tip and give thermal shock, the tips wont last as long and dont tin as nicely.
no thats how I understood you and its what it looked like to me from looking at the photos, thus why I asked you to confirm. forget removing the chip, even professional pick and place joints wont warranty that the chip will still work if you ask for removal.
Here is what I've done (not much, but it is a start
): Building the $99 ES9018 DAC Board H i F i D U I N O
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Here is what I've done (not much, but it is a start
Great stuff !
And that's a very cute xo board... damn I'm jealous...
Esp. compared to my horribly-wrong impedance op amp socket...
Thanks for posting current demands and that info about supplies. Total current = ~205 mA ? The Sigma11 should do nicely for AVCC = uZ output impedance.
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The cute XO carrer board, I just bought them from Ian as part of the FIFO kit. I think socket is OK. Ian uses them in the FIFO clock board. In fact he also has a clock adapater board for the Buffalo III where you install the clock on the clock carrier and then you plug it into a socket in the adapter board and the adapter board uses pins to connect to the BIII board. I was thinking that way first, but removed the pin socket...
Total current is that plus what the regulators consume. So for AVCC that would be 64 mA plus the additional shunt current to keep the regulator working at max current consumption, say 10-50 mA? depends on the design. AVCC also depends on the voltage you use and oscillator frequency. The 64 mA value is likely for 100 MHz and 3.6V. There is a AVCC power consumption chart in the ESS tech docs.
The sigma 11 looks nice. I'll have to take a closer look. I've always liked AMBs stuff.
Total current is that plus what the regulators consume. So for AVCC that would be 64 mA plus the additional shunt current to keep the regulator working at max current consumption, say 10-50 mA? depends on the design. AVCC also depends on the voltage you use and oscillator frequency. The 64 mA value is likely for 100 MHz and 3.6V. There is a AVCC power consumption chart in the ESS tech docs.
The sigma 11 looks nice. I'll have to take a closer look. I've always liked AMBs stuff.
A work in progress eh ? I can see there are now two positions for power supply caps for the op amps, which is more convenient, and the I2S can now be gsgsgsgs more easily so that'll be better for cabling/signal integrity.
GLT - the Sigma11 is excellent. All I did for this application was change the zener reference to two red leds (gives 3.8V output, no gain), and I used MUR120 for rectification, just cos they will allow a lower profile build.
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The G-mod
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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