jmpe

12 ms·

61.
by jmpe 13y ago
This sounds like a BGA issue. They also had the on PS3/4 and XBox if I'm not mistaking. The chip has a grid of small solder balls on the bottom instead of pins sticking out. Due to thermal differences during operation some rows ca
62.
by jmpe 13y ago
Wildly? When you develop software based on your own novel framework, wouldn't you need to do several test-runs, performance runs, sanity runs in the process? Do you keep all the intermediate debug data? I know I don't. In this cas
63.
Two Artists Live and Work on a Giant Rotating Hamster Wheel for 10 Days(thisiscolossal.com)
1 points by jmpe 13y ago|0 comments
64.
by jmpe 13y ago
Check out "The Scientific American Book Of Projects For The Amateur Scientist" - C. L. Strong describes quite a bit of this in the section "The earth sciences". The schematics date from 1960 (tubes, not transistors) but
65.
by jmpe 13y ago
Notice that they explicitly mention IoT, a week after Atmel announced a similar controller for an IoT module: http://atmelcorporation.wordpress.com/2014/02/24/atmels-smar...
66.
by jmpe 13y ago
Get yourself a discovery board from ST, same architecture (actually: a good range of choice) and no need to solder a 3 mm2 BGA ;)
67.
by jmpe 13y ago
an RTOS (uC/OS, Freertos, chibios, ...) or simply a hal such as CMSIS.
68.
by jmpe 13y ago
For more info on this search for "defensive programming", "Immunity-aware programming" and "preventitive programming". Several hardware companies have manuals/rules for programming in harsh environments. E
69.
by jmpe 13y ago
Here's a video where the author describes the work in the paper: http://youtube.com/watch?v=fpZD_3D8_WQ Very accessible.
70.
by jmpe 13y ago
For more technical searches, Google has become next to useless for me. Same here. I used to have corrections for java -> javascript but that seems to have been fixed. Just this morning I tried searching for this: µC/gu
71.
by jmpe 13y ago
They used bait & switch in Europe (at least where I was) to entice SMS adoption. There was a multitude of free SMS services: online sites where you could send someone a message for free or SMS a service that would forward it without bei
72.
by jmpe 13y ago
Embedded means bare metal access to everything. An OS like Linux shields such functionality, which is why it's frustrating to implement something as simple as a triac dimmer in a Linux SoC without doing everything in kernelspace to avo
73.
by jmpe 13y ago
The reason I posted the idea was to start with a system that is working and where you can forego the filesystem and other parts that are typically found on a full blown OS. It's not uncommon for an RTOS to dismiss the GC and leave it t
74.
by jmpe 13y ago
The author could focus on an existing embedded RTOS and fork from there. Enough cherries to pick one.
75.
by jmpe 13y ago
Nest is wifi, the second generation added 802.15.4 - but I never dealt with the product. Pure RF connection cannot be called IoT, right? You're correct. You always need a bridge to fill the gap between RF modules and the net. Su
76.
by jmpe 13y ago
Wifi is problematic due to price and power. Wifi embeddable modules aren't cheap, non-wifi RF are available for peanuts (RFM, Nordic, ...). But you kinda have to reinvent the wheel: the content of the packets is normally limited to 32
77.
by jmpe 13y ago
Yep, which is why they'll often have constant green, pulsing green or blinking green as different status indicators. Blue leds are mainly used for novelty value, it was the most difficult color to create in leds and now that we have th
78.
by jmpe 13y ago
The main motivation on my behalf is that it allows us to create synergy with sensors. Company A sells door/window contact stuff. Company B sells indoor presence detectors. Company C sells plugs to dim/switch/measure appliance
79.
by jmpe 13y ago
Have a bit of experience in this field, on a technical side: - Always provide a way to auto update and fallback if failed. - never implement a buzzer or beeper. - stay away from blue status leds. people really dislike them, especially in t
80.
by jmpe 13y ago
Not sure why you're telling me this, I suggested MSP430 to the parent post as an answer for the ISA he was looking for.
81.
by jmpe 13y ago
MSP430?
82.
by jmpe 13y ago
Check out the FiniteStateEntropy/test/probaGenerator.c code. It builds a table of character sequences based on a probability. If you feed it a p=0.5 you get a sequence that halves each time: 0000000011111223 (shortened example, th
83.
by jmpe 13y ago
We always knew that the implementation of these devices incorporated a uC, simply because the way you interact with them (SPI or SDIO interface) involves a state machine that would take up lots of space or upgrade headaches to do in pure ha
84.
by jmpe 13y ago
yeah, that line of reasoning totally makes sense. And ~500$ per hour for software ticketing is a reasonable number.
85.
by jmpe 13y ago
Google loves things that scale, and customer support doesn't scale that well I guess. Alternatively, couldn't they start a pay-per-minute service? I recently had an issue with GMail where I was receiving someone else's mail.
86.
by jmpe 13y ago
Complex question, but there are a few aspects that work against them: - coral typically takes several years before reaching sexual maturity. Adaptability to a changing environment strongly depends on this. - corals typically occupy ecologic
87.
by jmpe 13y ago
Thanks, wasn't aware of roboy. You're absolutely correct re clutching actuators. There are a lot of robotics projects out there that combine small devices with limited mobility to create a larger (multicellular) robot with higher
88.
by jmpe 13y ago
It's coming but robotics has a major obstacle: transferring power to locomotion. Ideally, we'd have something like a synthetic muscle that converts electricity to work. Instead we have all sorts of servo/hydraulics based actu
89.
by jmpe 13y ago
"Jupiter radiation belts" Found "Magnetosphere of Jupiter" on Wikipedia and it looks like the rest of my evening will be spent on this little tidbit. How could I never have heard about this.
90.
by jmpe 13y ago
I imagined that such a geyser has a limited lifespan. Same mechanism as why islands like Hawaii or the super volcano in Yellowstone come in chains. Same thing could be happening on Europa: the icy crust moves and the "hot spot" is

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