@Bitrex Thanks for that article. None of those ICs seem weird to me, but yeah, they were all useful in their day, and several don't really have rock-solid, and equally easy-to-use equivalents today.
@Bitrex The XR2206 is still available from Maxim for sampling, and is also sold here in our electronics market though at a ridiculous $11 apiece for singles. I've used one in a design not so long ago, and the waveform was so amazingly clean even compared to an Analog Devices DDS!
I have several different USB to UART things, basically because the el cheapo ones have don't take the effort to program a unique serial number in them and your PC won't be able to tell the difference between them unless they have a diffent chip
@abdullahkahraman Start skype and connec to me (Anindo Ghosh. Mumbai)
@jippie Typing works. I'm dropping off the hangout now
This was interesting. If I can get the tablet to work with my bluetooth headset, then hangout / skype becomes easy with the tablet even when I'm out of home.
@Rick_2047 Really bad idea for personal / hobby use. They have a huge mark-up, then a huge customs fee then a huge shipping fee and then they take a couple of weeks to deliver. In that time, I can get the same thing cheaper from ebay.com
@Rick_2047 My suggestion is to start with a pre-built module with that chip - they are not much more expensive than the bare chip. See the schematic, see it working, then build your own into your circuit
I think selecting that it can be broadcast to youtube freaks people out, and we dont have so many people we need it, so I am going to just leave it without
@Manishearth yes, I see you guys have a chatroom, ours stays active pretty consistently without.
@Manishearth but I thought some video chat would be a fun time to show off projects and a way to discuss some SE policy stuff face to face where people will not be as bothered.
Well i was learning transmission but i got a bit confused when i came to coaxial cables transmission at radio frequency. What i am lost is how the waves are propagating in the cable, i was thinking that ac current just flows through the conductor just like a normal 2 wire system to the antenna ....
@NarekBabajanyan that was very theoretical stuff, and although I like it, you really only need that to start a foundation, that is a very far way from real radio applicability.
@AnindoGhosh haha. It was fun to hear all the noises. You just made me long for living in a real city again.
I live in OK right now, which I hate, and one day I will live in a city like NYC or Seattle if I am still in the US. Many other options if I am lucky enough to go abroad.
@Kortuk Mumbai is probably nothing like your past experience of real cities. There's one book I would recommend: Maximum City. It gives a flavor of the Mumbai I know.
@AnindoGhosh yeah, the denser the city the more I like it, NYC is my favorite in the US, but I will admit I really loved Seattle. I will visit India at some point, since my company is building a site in chennai my chances go up greatly of getting someone else to foot the plane bill, although chennai was not my target of any trip. Bangalore and Mumbai are.
@Kortuk You know, a year ago if I had been sitting in a superstore parking lot running a vidconf with multiple people, via a mobile phone data link over wifi, I would have probably been arrested for black magic. And yet, none of the technology I was using is less than a couple of years old, even in my hands.
When I was at work playing with our positioning system and learning how they plan treatments and all of these systems just work together perfectly it blows my mind!
That is just a beautiful connection of many different technologies.
@AnindoGhosh Cool, thanks. the problem is that he is solving the opposite problem from me: he needs to load stuff fast. I need to output stuff fast. But it is a useful reference.
@jippie I need a clock: it's an SPI-like protocol: I am loading into TLC5940s. No start/stop, just a clock, and a latch: like the 74HC595 shift register.
@jippie I was bitbanging 24 of them in parallel, but now I am thinking of trying to do this serially. At least this way I can twiddle the bits while the hardware pushes them out for me.
@jippie Well, here's what I am thinking: for bitbanging, for each bit I have to set a bit in a register (a clock cycle), and then for every six bits (I have 6 drivers in parallel) I need to lower/raise a clock line. Whereas using SPI, I need much less bit twiddling, and I can do stuff while the AVR pushes the bits out.
@jippie Hmmm.. that would be bad. Can I see your code?
@jippie Though I really appreciate you bringing up this issue: I should think about this and test it like you suggest before assuming that 2 clocks is all there is to SPI
@jippie As in: load SPDR, then you update the data pointer, then you load the data into a register, THEN you wait for send to complete (polling) and then you load SPDR and repeat.
I am bringing up a new board soon based on TI's AM335x cortex A8 CPU. Development environment is Ubuntu 12.04 running in a VM. Can anyone suggest a good reliable JTAG adapter what will work with this chip and support the usual software such as GDB, OpenOCD etc?
@jippie +1 on that. THe advantage of serial processing is that less bit twiddling will be necessary. The only big problem is that AVR SPI only supports 8-bit data. TO use TLC5920 serially, you need 12-bit sends, so you have to shuffle nibbles around
I am bringing up a new board soon based on TI's AM335x cortex A8 CPU. Development environment is Ubuntu 12.04 running in a VM. Can anyone suggest a good reliable JTAG adapter what will work with this chip and support the usual software such as GDB, OpenOCD etc?
