#avr | Logs for 2015-08-26

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[00:04:31] <Casper> ... might have to rethink
[00:05:15] <rue_school> I had to current sense on the high rail
[00:05:34] <rue_school> which goes from 0-30V, so I had to add a supply to it
[00:05:56] <rue_school> most of hte current sense chips are designed to measure current on 12V or lower rails
[00:06:37] <rue_school> none of them like to go down to 0
[00:06:55] <Casper> the shunt I initially planned to use is 0.01ohms and 3W
[00:07:05] <rue_school> so I used an isolated supply for mine so it didn't matter, and had it convey the result via a current source
[00:07:26] <Casper> the math at 30A say 9.15W dissipation
[00:07:51] <rue_school> I^2 * R
[00:08:24] <Casper> yeah
[00:08:49] <Casper> if I use a trace, it's 662mils and 12.4" long
[00:08:54] <Casper> and 0.3V drop
[00:16:55] <rue_school> make it thicket
[00:17:01] <rue_school> thicker
[00:17:18] <rue_school> go for 750thou
[00:23:26] <Casper> I'll actually need to see if the opamp will work fine with higher gain
[00:25:35] <Casper> 662mil x 4" = 0R00328, 0.0984V, 2.95W
[00:26:34] <rue_school> you can double side it too
[00:26:34] <Casper> and, the nice thing is... it is actually possible to tune it up after... reading too low? sand down or scratch/cut... too high? add solder
[00:26:53] <rue_school> distributed cuts
[00:27:03] <rue_school> try not to make any points too narrow
[00:27:14] <Casper> I'ld prefer to sand down
[00:27:21] <Casper> near the wires
[00:29:11] <Casper> and.... why!
[00:29:19] <Casper> why is my foot hurting?
[00:29:29] <Casper> just in front of the heel...
[08:58:57] <tekkkz> is this ok for the beginning? https://youtu.be/O8iSmFr71CY
[09:02:21] <tekkkz> any statements?
[09:02:49] <fa-st> tekkkz: I Dont understand why *not* Using an IDE makes you a smart/good Programmer.
[09:03:17] <tekkkz> no
[09:03:23] <tekkkz> but i hate ides in general
[09:03:29] <tekkkz> ist too much what you dont need
[09:03:33] <tekkkz> i like it simple
[09:07:02] <tekkkz> but is it a good idea fa-st ?
[09:07:37] <fa-st> IDK..your tutorials start next week ;)
[09:07:42] <Emil_> tekkkz: You don
[09:07:57] <Emil_> sorry
[09:08:01] <Emil_> your age isn't relevant
[09:08:39] <tekkkz> what?
[09:10:01] <tekkkz> Emil_, what you mean?
[09:35:40] <Emil_> tekkkz: the video, you start by telling that yoy're seventeen
[12:29:39] <Ad0> is the wifi SoC any good ?
[12:52:41] <Lambda_Aurigae> Ad0, "the wifi SoC"? you do realize there is more than one, yes?
[12:59:10] <Ad0> yes
[12:59:18] <Ad0> but like, in general
[12:59:29] <Ad0> I wonder what can give a good range on low power, right
[12:59:32] <Lambda_Aurigae> some are usable, some not so much so.
[12:59:35] <Ad0> they are soon out with their BLE
[12:59:55] <Ad0> I need a soc which is capable of doing some stuff on it's own without the need for a separate MCU
[13:00:00] <Ad0> like read SPI @ 2M
[13:00:36] <Lambda_Aurigae> the esp8266 is a full 32bit microcontroller with built in wifi capability.
[13:02:32] <Ad0> cool
[13:03:05] <Lambda_Aurigae> the toolchain for it is still being developed and is in early to mid stages.
[13:03:13] <Lambda_Aurigae> but it seems functional from what I've seen.
[13:03:21] <Lambda_Aurigae> haven't actually gotten one of the chips yet though.
[13:03:30] <Ad0> hm I need a toolchain that actually works
[13:03:33] <Ad0> is this very new?
[13:03:47] <Lambda_Aurigae> they have been around for something like 6 months.
[13:03:54] <Ad0> I am wondering about power usage, sleep, range
[13:03:56] <Lambda_Aurigae> probably longer in china but have just made their way to this country.
[13:03:59] <Lambda_Aurigae> look it up.
[13:04:10] <Lambda_Aurigae> range depends on the antenna mostly.
[13:04:18] <Ad0> ESP8266
[13:04:19] <Lambda_Aurigae> power usage and sleep mode, is all in the datasheet.
[13:06:14] <Ad0> Tensilica’s L106 Diamond series 32-bit processor
[13:07:40] <Ad0> 60 µA in deep sleep
[13:07:45] <Ad0> well nordic semiconductor does less
[13:07:54] <Ad0> but I am not sure if it is a huge thing really
[13:11:31] <Ad0> I need something that can work anywhere in a house
[13:11:54] <Ad0> and I think BLE is too weak
[13:11:55] <Lambda_Aurigae> that all depends on the house.
[13:12:04] <Ad0> well the average house
[13:12:15] <Ad0> not a huge mansion with lead walls
[13:12:16] <Lambda_Aurigae> bluetooth is meant for 1 to 5 meters max.
[13:12:28] <Lambda_Aurigae> I've lived in houses where wifi wouldn't work from one end to the other.
[13:12:47] <Lambda_Aurigae> and in apartments where I could use line of sight flashing LEDs for communications.
[13:13:17] <Ad0> hehe
[13:14:50] <Lambda_Aurigae> I also have some nordic chips on breakout boards with SMT antennas that are good for about 8 to 10 meters but not so good if there are a couple of walls in the way.
[13:15:25] <Ad0> no
[13:15:34] <Ad0> wifi has better range
[13:15:57] <Lambda_Aurigae> it does if you have the right antenna.
[13:16:14] <Lambda_Aurigae> the nordic chips I use run in the 2.4GHz range so they are just like the wifi on my laptop.
[13:16:20] <Lambda_Aurigae> only, they have much smaller antennas.
[13:16:32] <Lambda_Aurigae> I have two nordic chips with external antenna connections.
[13:16:46] <Lambda_Aurigae> with the 8 inch whip antennas connected I can go 50 meters.
[13:16:57] <Lambda_Aurigae> same chip as the ones with smt antennas.
[13:33:50] <Ad0> yeah
[13:34:09] <Ad0> not enough for a house I guess
[13:43:21] <Ad0> possible to have a repeater for wifi direct though
[14:35:10] <Jartza> evening
[15:22:18] <Yoduza> evening
[19:56:27] <postmodern> can you connect to atmel's debugWIRE interface via openocd?
[19:58:19] <Tom_itx> only if you're ocd
[20:02:14] <postmodern> you really have to be when configuring openocd :P