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I like black forest ham for my sandwich
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Apr 27, 2024 18:30
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i'm a ham fan too
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Apr 27, 2024 18:34
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you wouldn't cram a ham
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Apr 27, 2024 18:52
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nice ham, would be a shame if someone put it between an “s” and an “e”
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Apr 27, 2024 19:36
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On the long path to building my ideal custom ham radio, got a design for the actual radio but doing all the accessories first to make sure I nail the UI. then the actual radio stuff can be designed around that and it might actually fit together at the end got this Harris RF-5980 speaker (great condition), now with entirely new internals  internal speaker is decent (flat to 8 kHz), and can plug in two handsets so testing with an H-350 and a Racal RA5000 noise canceling headset  main PCB ended up a bit messy, since I wanted plugs for all the major assemblies so there's a lot of individual looms but at least it's easy to work on. STM32F103RE main processor (a bit poo poo by modern standards, but perfectly adequate). ADAU1701 audio DSP, and a WM8804 S/PDIF transceiver ADAU1701 is also a bit old school now but it's super convenient currently got working microphone amplification and speaker outputs, and when you PTT it makes little beeps and does talkback in the handset/headset. got the sound processing pretty well tuned after re-reading the last local QST script a few times to myself. this thing will be the "hub" for the radio UI so it has a couple extra serial port outputs and can pass a second S/PDIF pair to an external headset/PTT in future also found that: dinky SOT-23 1.8 V regulators will not power an ADAU1701, seems like it pulls a lot of current on startup isolated DC/DC converters are kind of noisy in the audio band (who knew?) so tacked on some extra decoupling caps on the +/-15 V and added a set of 78/7912's to fully quiet the microphone amps down the converter is mounted on a bracket next to the speaker with feed-through capacitors so I figured it'd be fine WM8804 is a bit finicky to set up, but seems to work well enough when locked somehow managed to gently caress up measuring the mounting hole spacing, but I just drilled two new holes and plugged the old ones
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Apr 27, 2024 20:18
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that's pretty cool, but you might consider adding more wire ties
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Apr 27, 2024 20:58
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how can this be four years ago it was always in the back of my mindCaptain Cool posted:tally ho 1. get coordinates from rom 2. turn them into a 3d model somehow 3. unfold with pepakura 4. use the unfolded version as a template to bend and solder a literal wire frame 2 turned out to be openscad, specifically the polyhedron function  4 is on hold until I try some different methods to straighten wire. But in the meantime, as long as I have a 3d model...    The most satisfying part was making the exact debug I needed to define the faces code:
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Apr 27, 2024 21:24
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outhole surfer posted:that's pretty cool, but you might consider adding more wire ties yeah this is just the quick and dirty prototype, will add more lacing wire before it's finished
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Apr 27, 2024 22:08
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i am mad jealous of that lacing skill. makes anything look space-age
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Apr 28, 2024 04:17
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i keep a spool of waxed cotton line around for lacing. back at the computer shop i slapped newegg parts together and fastidiously laced the psu, sata, all the wires and i am 100% sure that nobody ever noticed or appreciated my work and all those old athlon xp boxes are now in landfills, but it was not wasted effort.
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Apr 28, 2024 08:29
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PokeJoe posted:I cut some rocks today how do I start doing this?
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Apr 28, 2024 09:37
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Jonny 290 posted:i keep a spool of waxed cotton line around for lacing. back at the computer shop i slapped newegg parts together and fastidiously laced the psu, sata, all the wires and i am 100% sure that nobody ever noticed or appreciated my work and all those old athlon xp boxes are now in landfills, but it was not wasted effort. what kinda knot do you use when lacing cables? is it the same kinda knot you're supposed to use when tying poly pull line to a cable?
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Apr 28, 2024 16:47
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shackleford posted:what kinda knot do you use when lacing cables? there's infinitely wanky versions you can use but I basically do what they show here https://www.dairiki.org/hammond/cable-lacing-howto/ if you do it the right way around it'll self tighten as you pull along the cable, the wax/rubber in the cord kind of hardens after a while making it stay pretty well in place IME those ridiculous termination stitches don't actually hold up to cable movement anyway (even when pro's do them) so I just do a bunch of laces right next to each other then use some glue on the ends UV adhesive is pretty good since it soaks in and cures instantly, superglue can work, some types of clear silicon RTV also work but need a long curing time
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Apr 28, 2024 17:09
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zokie posted:how do I start doing this? you just need cool rocks and a rock saw. I built my own but "diamond pacific" is the brand everyone gets. you want what's called a "trim saw" to cut small stones e: it was way cheaper to build if you are confident in your diy skills. I used a CNC spindle motor, some bearings, a linkbelt, a 6" diamond aliexpress blade, and other various bits and bobs I have a lapidary thread in DIY no one uses: https://forums.somethingawful.com/showthread.php?threadid=4041671&pagenumber=1&perpage=40 PokeJoe fucked around with this message at 19:55 on Apr 28, 2024 |
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Apr 28, 2024 19:48
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hey what should I do with an old stm32f0-discovery board I dug up
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May 3, 2024 01:31
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Silver Alicorn posted:hey what should I do with an old stm32f0-discovery board I dug up if you don't have a specific application for it or a reason to learn the STM32 ecosystem, just put it back in the drawer you found it in and forget about it. i've always found the STM32 series to be needlessly obtuse and poorly documented, it really takes a lot of effort to get them working well beyond just using the HAL system to crap some slow buggy code out for you. but maybe i'm just being grumpy because i've had to work with the F4 and H7 series chips, maybe the M0 is more straightforward and even if the documentation sucks it's a popular enough micro that you can google up all the work-arounds for their hideous HAL code.
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May 3, 2024 04:35
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yeah it looks like I wont be doing much with it anyway. the SDK detects the board, but it thinks there's no device attached. not sure if it's broken or just too old for the modern tools. I have an RGBDuino to play with and an ESP32 coming soon anyway, I'll check back in when I've done something or other with those
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May 3, 2024 13:46
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I'm a bit late to this party but a thing spare microcontroller boards are good for is playing around with/gluing together miscellaneous SPI/I2C sensors, ADCs, displays, etc to make temporary single-function fixtures. I got my rl78 microcontroller board talking to these cheap I2C OLED displays today. I'm probably not going to use the RL78 in any projects since I'm convinced 16-bit micros are obsolete, but having a drawer full of dip32-shaped rl78 boards means anytime I need to cobble together some crap or test out an oled display I can just grab one of these and a fistful of clip leads. Stack Machine fucked around with this message at 04:51 on May 4, 2024 |
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May 4, 2024 04:42
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yeah I found my rgbduino I'm gonna mess with it this weekend apparently I lost the text scroller program I wrote before
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May 4, 2024 04:43
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I had also bought a little LCD touchscreen but I'm not sure where it is
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May 4, 2024 04:43
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Silver Alicorn posted:hey what should I do with an old stm32f0-discovery board I dug up
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May 4, 2024 05:11
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I got a 48K Apple II+ to gently caress around with and now have a Language Card, a pair of Disk II with controller, a Super Serial Card, and a Thunderclock, with a VidEx 80 column card on the way as well as, uh, the power supply I need to run it all (oops) gonna plug it into an Amdek Color-I and home compute like it’s 1982
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May 4, 2024 05:17
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 ok I got this little TFT LCD shield working on my RGBDuino. took me a while to find the right library! no idea what to do now though. maybe figure out serial comms so I can make it display the weather or something
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May 4, 2024 08:45
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incidentally, I can’t recommend the RGBDuino. the RGB LEDs on it are meant for strip lighting, so they’re super super bright. the documentation is incredibly sparse, and nobody seems to be using them, so it’s impossible to find example code. also, the headers are surface mount - when I tried to remove a shield I had on it, they ripped right off and I had to resolder them. hm
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May 4, 2024 09:02
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 Figured out how to use powershell to get the weather from wttr.in and send it over serial, we're cooking now
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May 4, 2024 22:08
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hell yeah
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May 5, 2024 19:42
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  tried a little vector art & added a 2nd page for detailed info. I think I have this little task “solved”, everything else I could do is just more of the same. fun for a little project though! arduino is fun but I feel like the space inefficiency is a big drawback e: wow thanks for the tiny thumbnails postimages
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May 5, 2024 21:33
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Silver Alicorn posted:
is that like a keyboard switch comparison device?
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May 5, 2024 21:37
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yeah, I was trying out switches and never put it away 
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May 5, 2024 21:39
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i was working on my dual-core STM32 project again, each of those chips has a universally unique ID number burned into a special location in memory at the factory. problem is those special locations in memory can only be accessed by the M7 processor. if you try to touch those memory addresses with the M4 processor the chip hardfaults. naturally it's the M4 processor that actually needs the UUID value so i'm going to have to jump through some extra hoops passing stuff through shared memory space to get the data where it needs to go. in happier news my employer finally cleared me to open source my non-work-specific code for this chip once all the low level drivers are done enough to go up on github.
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May 7, 2024 01:24
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