**** BEGIN LOGGING AT Fri Aug 10 03:00:01 2018 Aug 10 03:01:49 set_: I'm not sure that I understood your question about mAh Aug 10 03:03:30 But in the absence of a short or a shunt, it's the voltage that matters. Aug 10 03:07:17 more mAh capacity = more run time at the same load. And then there's the matter of current draw, batteries might be rated for a max supply current (A or mA), and your electronics will be rated at a maximum draw (A or mA). If your battery is rated too low, your project may not power on, may not stay on, or some blocks might have brown outs. Also, if the battery power path is unregulated, your batts might overheat and/or ignite/explode. Aug 10 03:08:09 Sorry for the fire hose :) Aug 10 03:08:33 Oh. Aug 10 03:09:09 No issue. Aug 10 03:09:15 Woo Aug 10 03:09:20 I appreciate most feedback. Aug 10 03:10:12 I am figuring out that I must set up a quadrature encoder in and dc motor out x's 4! Aug 10 03:10:28 To get up and running or maybe not. I am baffled right now. Aug 10 03:11:43 brb: Has to yell in a pillow. Aug 10 03:12:20 I know very little about motors. But when you look at draw, some sheets use Watts. Roughly W/V= A Aug 10 03:17:13 Oh...I am back and fresh. Aug 10 03:17:15 Phew. Aug 10 03:17:59 kona: I am using the BBBlue w/ arduPilot, i.e. making a copter. Aug 10 03:18:14 Right now...I must get the wiring down pat. Aug 10 03:18:24 Yes, that sounds like it's going to be fun :) Aug 10 03:18:36 Yep. I found some good resources. Aug 10 03:19:10 Now...I just need to harness my eye power to support theory on these many subjects. Aug 10 03:19:48 Curious which battery you acquired Aug 10 03:20:27 Oh. Aug 10 03:20:47 Two Cell, 7.4V Aug 10 03:21:08 But I remember purchasing a heli battery. I got a land battery. Aug 10 03:21:18 Cars, Trucks, and etc... Aug 10 03:21:19 Hmm. Did u check the input voltage on the BBblue? Aug 10 03:21:26 Yea. Two Cell. Aug 10 03:21:56 I checked the voltage but I was a bit flakey on the mAh. Aug 10 03:22:03 But...you did reassure me. Aug 10 03:25:11 https://raw.githubusercontent.com/mirkix/ardupilotblue/master/image/servopwr.png is what I am following for wiring but it leaves me in the dark. Aug 10 03:26:43 actual wiring of ESCs and connections to the BBBlue are beyond me for now. I am going to research more as time pursues. Aug 10 03:26:49 Ok. I was looking at the blue page and it looks like it takes 9-18V at the charger input, but I haven't found what voltage it wants from the battery yet Aug 10 03:27:21 Two Cell...Look here: https://github.com/beagleboard/beaglebone-blue/blob/master/docs/BeagleBone_Blue_ShortSpec.pdf. Aug 10 03:28:23 I'm getting a 404 error on that page for some reason Aug 10 03:29:13 Hmmm. Aug 10 03:29:28 Odd. Let me check again. Oh, which page? The second link? Aug 10 03:29:51 Yes Aug 10 03:29:59 Let me make sure. I copied it. Aug 10 03:30:24 https://github.com/beagleboard/beaglebone-blue/tree/master/docs and go to shortspec.pdf. Aug 10 03:30:31 Maybe that will work. Aug 10 03:30:33 I also tried the same file in this directpry https://github.com/beagleboard/u beaglebone-blue/tree/master/docs Aug 10 03:30:53 Ah, well, I didn't paste that well. Aug 10 03:31:38 There is an odd /u/ in your paste. Try w/out the /u/. Aug 10 03:31:50 My phone can't open anything in that folder but I suspect the problem is on my end :) Aug 10 03:31:56 Okay. Aug 10 03:32:39 Anyway, I can see the schematic you linked, anything particular that confuses? Aug 10 03:34:40 Nope. i just do not know where I would place my motors w/ ESCs yet. Aug 10 03:34:58 I had a powerboard that i was powering w/ the BBBlue but I failed at that. Aug 10 03:35:21 I moved on. Now, I am trying to configure some hardware to make my motors turn when I apply power. Aug 10 03:35:40 ... Aug 10 03:36:08 I have the correct wiring connections that I can make. I am at a loss right now on where to make them. Aug 10 03:36:55 I'd have expected the motors to plug into the headers on the board, but I haven't looked super close at which headers are for which motors yet Aug 10 03:37:07 For instance, do I connect ESC(a) to the motor controller(a) and so on? Aug 10 03:37:14 ... Aug 10 03:37:23 I guess I would have to show you my set up. Aug 10 03:37:35 Ah, the short spec Aug 10 03:37:39 Yes. Aug 10 03:37:42 Finally loaded Aug 10 03:37:45 Aw! Aug 10 03:37:50 Chips ahoy! Aug 10 03:37:52 Hhahaha. Aug 10 03:42:23 I may be misreading that schematic but it looks like the 8x3 pin header will be one servo per row of three pins. Aug 10 03:43:02 Right. Aug 10 03:43:28 That is where my servo (but only two-wire) wiring will be placed. Aug 10 03:43:36 From the ESCs. Aug 10 03:44:09 So, I thought. Aug 10 03:44:24 <<<< Hopeless in Seattle. Aug 10 03:44:58 So, I have eight channels to choose from but I have a kicker. Aug 10 03:45:57 What type of pin usage should I use? Do I use PWM, GPIO, QuadRature Encoder for input. It is like I have never handled this before. Aug 10 03:46:43 Hmm. Aug 10 03:46:55 The BBBlue has many methods I can take to produce motor usage but I am stuck. Should I type up my own software when using the ArduCopter software? Aug 10 03:47:07 I am still new. Aug 10 03:48:02 Too many questions. I know. Aug 10 03:48:09 You're doing something I haven't tried. :( Aug 10 03:48:16 Oh. Aug 10 03:48:31 Looking at the docs I'm caught up to you, now, I think. Aug 10 03:48:40 I thought it was more straight forward. I was mistaken but there is no reason to give in just yet. Aug 10 03:48:41 Okay. Aug 10 03:49:19 No, no reason to give up, but hopefully someone who knows more about it will have an answer eventually Aug 10 03:49:31 Yep. Aug 10 03:49:43 kona: What are you doing w/ your BeagleBoard product? Aug 10 03:50:51 When I have some more cash I'm hoping to get some decent accelerometers and make a seismometer. Aug 10 03:51:44 For Earthquakes? Aug 10 03:52:03 Or for loud, bangin' neighbors? Aug 10 03:52:14 And I thought hanging them off of i2c would probably be good enough, and the the bone could crunch the data in numpy or there was this plotting library I found Aug 10 03:52:37 I hate when people make noise above me. Aug 10 03:52:53 Clank, clank, smash, thump. Aug 10 03:52:54 Mostly earthquakes I hope, although it will probably catch the marching band at the nearby high school :) Aug 10 03:53:01 Ha! Aug 10 03:54:01 I was always interested in quakes. Hey, Python makes it easy to plot, graph, and record (So I have been told). Aug 10 03:54:03 ... Aug 10 03:54:27 I refused to attempt those books just yet. I like motors more for now. Aug 10 03:54:29 I've also thought about using the raspberry pi for the number crunching and checking out TI's board support package for the Sitara chipset. I've got a beaglebone white Aug 10 03:54:45 Motors are fun :) Aug 10 03:54:52 Motors Rule! Aug 10 03:55:24 I am just tired of purchasing more batteries. They can get expensive. Aug 10 03:55:41 Too bad I cannot figure out solar/wind more often. Aug 10 03:56:07 Before my dad passed away we were going to try to make turntables for his model railroad, because the ones he wanted were indefinitely backordered, and the bone seemed like a good idea for controlling that via an Arduino and motor shield. Aug 10 03:56:25 Oh. Aug 10 03:57:06 Ya. Controlling motors w/ the Motor Bridge Cape is fairly simple if you want to go that route or the BBB.io people plan on getting GHI mfg. to produce some Capes. Aug 10 03:57:20 They will have some motor Capes, some Relay Capes, and others. Aug 10 03:57:21 But the railroad was his thing more than mine I think, it was more that it was something to do together. We sold all the train stuff. Aug 10 03:57:32 Oh. Aug 10 03:57:34 The cape would have been a good idea. Aug 10 03:57:41 Yep. Capes rule! Aug 10 03:57:49 Lots of extra functionality. Aug 10 03:57:57 w/out all the extra fun. Aug 10 03:58:20 or stress. I guess it depends on how we all look at it. Aug 10 03:59:01 hey kona: I will brb. I need to stand for a bit. Aug 10 04:01:03 e Aug 10 04:03:50 K, I have laundry to fold Aug 10 04:09:40 set_: we were trying to figure out a few different things. One was the right size motors for the trains he was running, another was whether we could make the turntables speak DCC to his fancy controllers. I figured the beaglebone using some peripherals was maybe the way to go, but we had decided that first something that could be controlled simply from a separate Controller would be a good start, so I was working on that and my brother was figuri Aug 10 04:10:12 Oh. Aug 10 04:10:39 There are ways to connect the MSP430 boards and Arduino boards to the BBBs. Aug 10 04:10:49 I remember going over a couple of books w/ that info. Aug 10 04:11:25 Let me go and see the books. Aug 10 04:12:31 Yes, you can connect via i2c and spi for the Arduino. I2c I think for the 430 Aug 10 04:13:36 These days it would be cool to have ditched the DCC console for a GUI on an HDMI enabled beaglebone. :) Aug 10 04:14:54 Hey. The Arduino seems to be 5v logic and MSP430 series are 3.3v which make them compatible. Aug 10 04:15:03 ... Aug 10 04:15:15 I found that older book on the BBB that I used to connect. Aug 10 04:15:23 :) Aug 10 04:16:08 BeagleBone Cookbook was its name. I think there are updated versions of this book on the Bone and online. Aug 10 04:16:19 ... Aug 10 04:21:57 Nice. Here's a video of an early prototype turntable assembly :) Aug 10 04:22:06 https://www.dropbox.com/s/1t89nuw0wwrkxmp/VID_20110416_171936.3gp?dl=0 Aug 10 04:22:15 I don't seem to have any newer ones Aug 10 04:24:33 i hope you figure your servos out. I've got to get a few things done and then sleep because work starts early :) Aug 10 04:27:19 Okay. Aug 10 04:27:34 See you later, kona. Aug 10 04:27:46 And remember...do not eat yellow snow. Aug 10 04:32:07 :) happy hacking :) Aug 10 04:33:48 Yeppers. See you later. Aug 10 05:43:54 ayjay_t: people doing video stuff Aug 10 08:34:09 hmm, in the beaglebone black's CE/FCC compliance doc the highest peak visible in the emissions is 228 MHz (= 19 * 12 MHz). does anyone have any idea what the origin of that is? Aug 10 08:37:15 zmatt: how high above noise floor is that? Aug 10 08:37:59 zmatt: and how was it measured? connected or unconnected radiation? Aug 10 08:41:12 zmatt: anyway, 12 MHz is likely the Xtal, right? if the peak is very prominent then it must be an external connection to a PLL generated clock Aug 10 08:41:50 could that be the DDR memory clock? Aug 10 08:52:57 ddr is 400 MHz Aug 10 08:53:03 iirc Aug 10 08:53:14 crystal is 24 MHz Aug 10 08:56:47 not sure what you mean by connected/unconnected. the beaglebone's test setup had a usb stick plugged in and was connected via usb and ethernet to a laptop and hdmi to display (both of these and the power supply were some distance away). our test is very different and we don't use usb or hdmi, but the same peak is visible Aug 10 09:02:28 zmatt: what probe do you use with the spectrum analyser? Aug 10 09:03:04 zmatt: E field probe, hovering over the board? Aug 10 09:12:34 with connected/unconnected I meant if the signal is conducted over one of the connecting wires (like, the bbb is in an enclosure and you measure what comes out of the enclosure) or if it's radiated from the board somewhere Aug 10 09:15:56 radiated, and I don't know the precise details of the test, we don't have the official report yet Aug 10 09:24:11 ok never mind, I was wrong... for the beaglebone it's not the strongest peak but the one with the least margin to the max allowed, and this peak doesn't exist for us. the peak I'm concerned about is actually 240 MHz Aug 10 09:24:33 so I'm guessing that peak in the beaglebone's test is hdmi-related Aug 10 09:34:13 thinkfat: yeah, I built one out of a nice large PWM controlled fan and some activated carbon foam. The latter I bought on Aliexpress. Aug 10 09:34:50 I had some 555 based PWM signal generators (also sourced from aliexpress) sitting around already. Aug 10 09:35:29 tbr: should not be too difficult to get some filter, likely doesn't have to be activated carbon anyway Aug 10 09:37:38 tbr: do you use a hose or just put the fan next to the board? Aug 10 09:38:05 https://www.aliexpress.com/item/2pcs-lot-Activated-Carbon-Filter-Sponge-for-Hakko-493-Solder-Smoke-Absorber-ESD-Fume-Extractor-13cm/32712020268.html? - not like it was horribly expensive :D Aug 10 09:38:19 yeah, just have it close to the working area, works sufficiently Aug 11 00:00:40 hmm, what's the boot time (as reported by systemd-analyze) of a recent iot image? I'm just curious but it's too much effort to reflash a beagle just for that ;) Aug 11 00:04:13 I did it! Aug 11 00:04:37 Motor Bridge Cape and Stepper Motors...RUNNIN'! Aug 11 00:05:08 Hey...I saw there was a new population date for the MotorCape coming out. Yea boy! Aug 11 00:05:47 I cannot wait. I am going to save and get it! Aug 11 00:06:11 Time less spent making H-Bridges and Connections makes me happy. Aug 11 00:06:22 brb Aug 11 00:10:34 oTay! Aug 11 00:41:28 I got it to twitch and jerk so far. I am goin' to the top! Aug 11 01:11:40 Now...are there any recommendations on what I should do w/ the two stepper motors I just received? I am not an original on this front. Aug 11 01:12:26 ... Aug 11 01:12:40 no lasers. **** ENDING LOGGING AT Sat Aug 11 03:00:00 2018