fest

29 ms·

271.
by fest 9y ago
I have only used ROS for a few simple projects, but I found catkin (which is actually a thin wrapper around cmake) relatively easy to grasp. As far as I know, catkin is actually an improvement over previous build system, rosbuild. You can l
272.
by fest 9y ago
First, define what do you mean by hardware, because the field is vast. Electronics design: https://contextualelectronics.com/ Programming embedded systems: http://shop.oreilly.com/product/0636920017776.
273.
by fest 9y ago
Nobody has mentioned Wacom Bamboo series digitizers, which is what I am using. It allows me to sync notes I'm writing on plain paper with my phone/tablet. It even tries to OCR my handwriting (which doesn't work flawlessly, b
274.
by fest 9y ago
I have been using the web interface on Android without installing anything. Home Assistant leverages web app manifest (essentially, creates an icon in apps list/homescreen which opens the web interface in a full-screen web browser).
275.
by fest 9y ago
For me, the most time-consuming part is drawing footprints for connectors and sockets. RJ-45 sockets and microSD sockets come to mind as my most memorable (footprint related) screwups.
276.
by fest 9y ago
From my personal experience: upstream packages get updated a lot more frequently, even faster than in debian-testing repo.
277.
by fest 9y ago
Some Bluetooth profiles can be used on iOS devices without MFI authentication chip on the Bluetooth device. Bluetooth audio/headset devices don't need MFI chip. Devices using Bluetooth serial port profile do need it.
278.
by fest 9y ago
+1 from me too- it's really nice soldering iron for the price.
279.
by fest 9y ago
Not Ethernet but open-source: https://github.com/festlv/esp-power-control
280.
by fest 9y ago
I'm more interested in things like: if the diode is on for half the time (50% duty cycle), can I use 10mW? if I transmit a high frequency chirp with even less total duty cycle, can I use even more power? Not that it really matters in m
281.
by fest 9y ago
On a related note- do you know of any books that cover diode laser safety? Specifically, I'm working on a FMCW laser rangefinder (hobby project to teach myself more of analog electronics) and would like to know what is the maximum opti
282.
by fest 9y ago
With MEMS based gyros and accelerometers: not enough to maintain position. With much larger and more expensive gyros/accelerometers dead reckoning is enough to navigate without external navigation systems for at least a few hours.
283.
by fest 9y ago
Even using calibrated and temperature controlled consumer level accel/gyro sensors for dead reckoning results in estimated velocity error reaching few meters/s in a second or two. Current consumer level sensor quality is enough fo
284.
by fest 9y ago
I've accustomed myself to openocd, gdb and some small custom scripts (e.g. interpreting fault registers) Hehe, the world really is that small :) Say hi to Mark if you meet him, I haven't seen him in ages.
285.
by fest 9y ago
I could agree with you on gdb's user interface. However, working on embedded hardware, plain gdb and it's architecture-specific forks|variants have been the least fiddly things to use. The most recent examples I've stumbled u
286.
by fest 9y ago
I have a friend who runs a lifestyle business of: 1) One-off mechatronics projects: museum exhibits, cable-cams for filming companies, puzzles for escape-rooms etc. 2) Regional distribution and support for a particular brand of lasercutters
287.
by fest 9y ago
ER-XG is quite far from home WiFi router though :) UBNT's new-ish home router series (AmpliFi) doesn't have default username/password- it needs to be set-up before using. I do think it's possible to have an open-network
288.
by fest 9y ago
Is the actuation really the part which needs radiation hardening? The cameras, sensors and processing unit seems more likely affected by radiation than, say a battery and motor.
289.
by fest 9y ago
3DR tried to compete with DJI in consumer space but failed. By now, DJI has more than a thousand of employees and at least a decade of experience in this area.
290.
by fest 9y ago
With product development times of 6-12 months, it doesn't make sense to pay 360k to get results in 3 years if you can pay 360k and get results in few months.
291.
by fest 9y ago
Haha, API :) I'm glad my national post office provides that data at all via their website.
292.
by fest 9y ago
Can't you just say that you've lost interest and want to do something else with your life? Worked just fine for me at my previous company- client base shrunk to almost nothing and while we could still pay the bills and our salarie
293.
by fest 9y ago
Tracking packages so I could batch my trips to post office. Simple web interface where I have a list of packages I've ordered with the last status update from post service web tracking for.
294.
by fest 9y ago
Spent about three calendar months (logged 120 hours IIRC) and few hundred EUR building a simple hardware product- small dongle to stream drone telemetry over WiFi (MAVLink to WiFi bridge). Could sell just 5 of them, still have about 30 in
295.
by fest 9y ago
If the number of distinct warnings is small, I tend to fix them and submit a PR.
296.
by fest 9y ago
IIRC a typical implementation of electronic global shutter for CMOS sensors requires one extra transistor per each pixel to "lock" the charge. As for why it's not being done outside specialised sensors: not many people are co
297.
by fest 9y ago
That is, until those people realize that they most likely will need that assistance at some point of their lives (child birth, major health issues). EDIT: To expand a bit, my wife is currently in one of those situations. A government progra
298.
by fest 9y ago
I too thought that ladder logic is horrible (and for certain tasks, it is). Ladder logic predates PLCS though- essentially the same notation was used when relays were used to implement it, and EEs were fine with that.
299.
by fest 9y ago
I started by getting a webcam or two and trying out various projects: marker tracking (made an optical IR pass filter and tracked an IR LED with two cameras), object segmentation (e.g measure geometry of certain-colored objects). Measure th
300.
by fest 9y ago
Patiently waiting for Animats to tell an interesting story about this code :)

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