#garfield Logs

Dec 01 2013

00:15 katsmeow-afk who was here?
05:38 rue_house lola
14:09 katsmeow-afk "so we were sailing about a mile off Kenya, and a couple skiffs pulled alongside and pirates began jumping onto the boat, and i yelled "REPELL BORDERS", and the stupid Ai opened a photo editor and rebuilt the website"
14:20 rue_house heh
17:38 katsmeow-afk how wide, for real, is a 2.5 inch hdd?
17:42 katsmeow-afk Tom, http://www.ebay.com/itm/Intel-Desktop-Board-D510MO-Atom-Processor-1GB-RAM-included-D510-Dual-Core-A-/281208756189 comments?
19:33 rue_house kat, I have one jammed in the chair holding it leaned back, but I dont have a ruler
19:44 Tom_itx katsmeow-afk i have a D525.. it had just come out to replace the D510
19:45 rue_shop2 drat, I have to look at that list more often
20:04 tsmeow-afk
20:18 Tom_itx not a bad little board
20:18 Tom_itx better than my other pcs :D
20:19 katsmeow-afk i wonder why it is so cheap
20:24 rue_shop2 wtf?
20:26 Tom_itx katsmeow-afk, they sold for ~$75 new
20:33 tsmeow-afk
20:33 katsmeow-afk if it still works, isn't it still worth $75?
20:35 katsmeow-afk but it's "10 available, buy now $29, free s&h"
20:40 Tom_itx how many did you want?
20:40 Tom_itx i like my 525
20:40 Tom_itx but i'm used to old equipment
20:41 katsmeow-afk i am curious about them, but i have a stable ful of desktops and not enough free money to buy more puters
20:41 katsmeow-afk "old", heh, all mine are over 10 yrs, some are nearly 14 yrs old
20:42 Tom_itx well buy food instead then
20:42 katsmeow-afk the monitors, i think, are newer, all my 15" eventually died and i replaced them with 17" as the prices dropped
20:43 katsmeow-afk been ~2 yrs since i bought a monitor, and that was under duress
20:43 Tom_itx i got a cheap wide one about a year ago
20:44 Tom_itx i needed _1_ more monitor for a pc that was missing one
20:44 Tom_itx no room for a crt one
20:44 tsmeow-afk knows of a 17 for $10 atm, and a 19 for
20:44 katsmeow-afk i just don't need one this minute
20:44 Tom_itx if it were $.12 i couldn't get it atm
20:45 katsmeow-afk yeas, here's that too, i gotta mind the priorities
20:45 Tom_itx just glad i got these free boards
20:45 Tom_itx or i'd be going nuts with little interesting to do
20:46 Tom_itx i'm running xilinx on the d525
20:46 tsmeow-afk
20:46 Tom_itx ubuntu
20:47 katsmeow-afk i have too many "hobbies": the big boat, the lil boat, the truck needs accessories, the car is broken down, the toilet is perpetually stopped, up and so on and so forth
20:47 katsmeow-afk and the electronics stuff
20:48 katsmeow-afk the truck is a monster to drive, and i can carry far far more *in* the car, altho the truck carries more on the bed
20:50 Tom_itx i had some corrupt files so i had to start over on this project
20:50 Tom_itx it takes 10-15 min to build each time but i'm taking one step at a time this time
20:50 tsmeow-afk nods a
20:50 Tom_itx to be safe and try to figure out what went wrong the first time
20:51 Tom_itx at least i'm back to where i was yesterday with it
20:51 katsmeow-afk take pics of the screen, and copious notes
20:51 katsmeow-afk you may write it one way and typo it in another way
20:52 Tom_itx can't really do it that way
20:52 Tom_itx i did take notes
20:52 Tom_itx and figure out what pins i want the functions on
20:52 Tom_itx problem is, i'm trying to do something questionable but was told it 'might' work
20:53 Tom_itx trying to make use of all available pins i can
20:53 Tom_itx there is an encoder function that takes A B & Index pins
20:53 Tom_itx i'm only using A & B on one and A on another
20:53 Tom_itx i'm trying to remap those spare unused pins to a completely different function
20:54 katsmeow-afk is this an exercise to use up the pins, or to cram more into the chip than was designed for?
20:54 Tom_itx cram
20:55 Tom_itx if it works i won't have to move the MPG encoder
20:55 katsmeow-afk oh
20:55 Tom_itx otherwise i won't have enough pins for it to work
20:55 katsmeow-afk surely there's bigger chips?
20:55 Tom_itx trying to get enough pins to communicate with these new boards
20:56 Tom_itx it takes RS422
20:56 Tom_itx and only certain pins have those chips on them
20:56 Tom_itx i got plenty of free TX pins but no RX
20:56 Tom_itx so i'm remapping stuff
20:56 tsmeow-afk
20:58 Tom_itx another successful build... time to make more edits
20:59 Tom_itx http://tom-itx.dyndns.org:81/~webpage/cnc/configs/sherline/bitfiles/PIN_SVST2_4_7I47SS_48.vhd
21:00 Tom_itx that's one of the files i did
21:00 Tom_itx now i'm modding it to move some functions
21:01 katsmeow-afk lotta emptypin and Null
21:02 tsmeow-afk mashes a zif into a breadb
21:04 Tom_itx yeah those are GPIO if null
21:04 Tom_itx there are 2 50pin headers with GND on half of each
21:04 Tom_itx the 24 io per header is what i get
21:05 Tom_itx i have one card plugged into the top header
21:05 Tom_itx the bottom one is open and i just plug wires into it
21:05 Tom_itx so the card plugged into the top one is what i have to please
21:06 Tom_itx the functions are listed just above the io
21:19 katsmeow-afk last two pics on http://designerthinking.com/MyTekPlugins500.html are new
21:20 katsmeow-afk the *actual* 2-wide and 3-wide are narrower than using 3 1-wide digits, so the square cutouts are a lil wide
21:20 tsmeow-afk points out that she has no sheet metal b
21:21 katsmeow-afk hmm, couple pics didn't get upladed
21:25 Tom_itx ok here goes nuthin
21:26 Tom_itx looks good
21:26 Tom_itx it's still churning... that's more than it did last time i did this
21:27 Tom_itx it's very easy to mis number something
21:27 katsmeow-afk hence the pic-taking with camera
21:29 Tom_itx so far so good
21:29 Tom_itx it's doing what he said
21:29 Tom_itx it assigns 0 to the blocks that should be assigned pins
21:32 Tom_itx i don't mind these long waits if it works...
21:36 tsmeow-afk needs more IQ po
21:36 Tom_itx huh?
21:36 Tom_itx yay! looks like it might work
21:37 Tom_itx one last step then to test the hardware
21:38 tsmeow-afk orders a pizza and some wine coolers, preparing for the celebra
21:52 Tom_itx crap
21:52 Tom_itx says it compiled fine but i compiled it for the wrong chip
21:53 Tom_itx says i got the 200k gate chip but i'm sure i have the 400k gate one
21:56 rue_house code for kat
21:56 rue_house kat, how does this go then, the clock pulses are provided to the adc micro?
21:57 rue_house and it gives just the 10 bits back?
21:57 rue_house I think thats what she said
21:57 katsmeow-afk yeas
21:58 katsmeow-afk but the preamble of one bit to say it's done
21:58 katsmeow-afk wake up, look for clock, when got a high on clk pin, do an adc, then when done output a high,, then i send it 10 clks to get the 10 bits
22:01 katsmeow-afk i gave you an url to the flow chart
22:02 katsmeow-afk this way, i can use 3 optos to control 2 synchronous adc : combine the clks on one, read out each at the same time on two
22:03 katsmeow-afk and the conversion timing shouldn't be off by more than a millisec
22:06 katsmeow-afk http://designerthinking.com/images/Tek-design/DSCF6493.jpg
22:07 katsmeow-afk possibly using one of the timers to cause an int and reset if the handshaking isn't done in a reasonable time
22:16 katsmeow-afk if i am real smart, i will combine all the clk signals and read out each pair of data for all 4 channels at once, since it's 8 bits wide, right into an avr down at ground level, which can shift and sort as necessary
22:23 tsmeow-afk throws an url at rue : http://www.ebay.com/itm/221327545118
22:27 katsmeow-afk two t13 are cheaper than most of the other chips, and with two t13 i get the two readings simultaneously
22:27 katsmeow-afk it's a win-win
22:27 katsmeow-afk plus i can set each t13 at different vcc-gnd settings
22:28 katsmeow-afk cheaper, more versatile, and faster, how can you beat it?
22:28 katsmeow-afk afk
22:28 rue_house ok
22:31 rue_house haha thats better than my radioshack bench supply
22:35 rue_house http://www.ebay.com/itm/DC-Converter-Constant-Current-Voltage-5-35V-1-3-30V-LED-Driver-Battery-Charger-/281041231209
22:35 rue_house maybe its time for a new bench supply
22:36 rue_house hmm yea, my bench supply is 0-24V at 1A
22:37 rue_house and I'm not so sure it actually likes putting out 24W
22:39 rue_house .05R
22:39 rue_house at 5A
22:42 katsmeow-afk bak
22:51 rue_house lsb first, ok?
22:51 katsmeow-afk ok with me
22:53 katsmeow-afk this item is 1/2 the watts, twice the price, of a laptop psu : http://www.ebay.com/itm/30W-Constant-Current-LED-Driver-AC85-265V-to-DC32-36V-1000mA-for-30W-LED-Light-/321153517900
22:53 rue_house ClearBit(DATAPORT, DATAPIN)
22:53 rue_house while(1) {
22:53 rue_house while(isLow(CLOCKPORT, CLOCKPIN)); // sleep while pin low
22:53 rue_house value = getADC(); // do conversion
22:53 rue_house SetBit(DATAPORT, DATAPIN); // flag done with data high
22:53 rue_house
22:53 rue_house for (i = 0; i < 10, i++){
22:54 rue_house waitClockRiseEdge(); // wait for clock bit to go low
22:54 rue_house if(value & 0x01) SetBit(DATAPORT, DATAPIN); // put data bit on bus
22:54 rue_house else ClearBit(DATAPORT, DATAPIN);
22:54 rue_house value >>= 1; // shift it by 1 bit
22:54 rue_house }
22:54 rue_house waitClockFallEdge(); // wait for done
22:54 rue_house ClearBit(DATAPORT, DATAPIN); // leave data low
22:54 rue_house }
22:54 rue_house I just have the wrote the functions
22:54 rue_house testing it will be the hardest part
22:55 katsmeow-afk i barely understand it, but it loks easier than i imagined
22:58 katsmeow-afk what does this mean : if(value & 0x01)
22:59 katsmeow-afk the if-else there just sets 1 or 0 ?
23:00 rue_house if (value & 0x01) will AND the adc reading with 00000001 and if its non-zero, execute the next instruction
23:00 rue_house so, yes
23:01 katsmeow-afk so if the LSB is a 1 , then output, else output a 0
23:01 rue_house yes
23:02 tsmeow-afk looks more tired than she should be, which is normal when breathing smoke all day out
23:03 katsmeow-afk need any 35amp 1kv bridges for $1 each?
23:03 rue_house no
23:04 rue_house dont do many linear supplies anymore
23:04 katsmeow-afk what's a rectifier got to do with linear vs switcher? all my line operted switchers use a bridge
23:05 rue_house dont tend to build line switchers
23:05 katsmeow-afk k
23:06 rue_house oh I didn't show you the timing diagram, thats why your not answering
23:11 rue_house katsmeow-afk,
23:12 katsmeow-afk hmm?
23:12 rue_house http://eds.dyndns.org/~ircjunk/images/p1050641.jpg
23:12 rue_house yes?
23:13 katsmeow-afk works for me? easy as pie! see any problems?
23:14 rue_house I worry about sync, but your not, so its ok
23:14 katsmeow-afk at 50 cents each (maybe less) these could be sprinkled all over the place to see if motors are pulling how much current, see if batteries are dead, check if photocells can see light, etc
23:15 katsmeow-afk it's a REAL pita to find out the battery charger has not been charging for 2 days, things like that
23:15 katsmeow-afk you can float one on each battery of your 48v system
23:16 katsmeow-afk JULY 1968 - REVISED SEPTEMBER 2002
23:16 katsmeow-afk Specifications are subject to change without notice.
23:16 katsmeow-afk TIP36 data sheet
23:16 rue_house heh
23:16 katsmeow-afk 45 years
23:16 rue_house they just had to add the disclaimer?
23:17 katsmeow-afk well, strangely, the new 2n3055 are so not like the original 3055, the new one often won't work
23:18 rue_house 0 gain or smaller wire guage off the die?
23:18 katsmeow-afk diff die making processes, changes in capacitances and speeds
23:19 katsmeow-afk the old 3055 were very vrey slow, the new ones are like 8x faster, it can upset the anti-oscillator snubbers in psu, for instance
23:19 katsmeow-afk "improving"
23:19 katsmeow-afk it made it essentially a new part
23:21 katsmeow-afk in the last 45 years, there's been almost no transistors comparable to the 2n3775(?), the closest thing is a MJ15024
23:21 katsmeow-afk the MJ11015 is a great improvment over the 3055, but the MJ15025 is the only family that will carry 2 amps at 80 volts across it
23:23 katsmeow-afk at 80v, the big TIP36 is good for only 150ma
23:24 katsmeow-afk i think all the oem switched attention to mosfets and igbt and etc
23:29 katsmeow-afk it's a skinny R2D2 !! ==>> http://knightscope.com/
23:30 katsmeow-afk "there's this idiot robot stuck in a pothole behind my car, and i cannot move it, and i am late for an appointment""
23:31 katsmeow-afk re Amazon : In what is likely a cunning reminder of the e-tailer's upcoming Cyber Monday sales, these bots will apparently be capable of delivering packages up to five pounds (86 percent of orders are apparently less than that), with the aim of getting them to your house in under half an hour.
23:31 katsmeow-afk The system is called Prime Air and the octo-copter drones, which wait, ready to deliver, at the end of conveyor belts, have a range of 10 miles.
23:32 katsmeow-afk http://www.forbes.com/sites/matthickey/2013/12/01/meet-amazon-prime-air-amazons-delivery-by-aerial-drone-project/