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bio website kj6aku.wordpress.com
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BSEE, but a hobbyist at heart. Electronics interests tend to FPGAs, robotics, RF, and test equipment. Currently in grad school for physics; still have a lot to learn.


2d
revised From pulse height to number of electrons
clarification
2d
answered From pulse height to number of electrons
2d
comment From pulse height to number of electrons
It's more likely a 50 Ohm system, but integrating the charge is the right approach.
May
15
comment How exactly do all FPGAs work together on this board to carry out high speed calculations
@StaceyAnne, the only advantage I see is cost. Virtex logic is roughly an order of magnitude more expensive compared to Spartan logic. e.g. for the top-of-the-line configuration of this product, it'd be $5000 vs $50,000 in FPGAs. So this would be the way to go, if logic size is important but more speed is not worth paying for.
May
10
comment Is De0-Nano an alternative to Arduino/RaspberryPi?
This is a soft question which is frowned upon here, but anyway... They are all beginner platforms but there is not really an FPGA hobbyist community (yet). Also FPGA toolchains are closed-source software.
May
1
comment Using standalone smartphone camera
I was following that forum thread back then (I have an FPGA project with this camera on the back burner); no high-res or JPG, just small (or "awful") images.
Apr
30
comment Using standalone smartphone camera
Nota bene: The TCM8240MD is not particularly easy to work with. Nobody has been able to get usable high-resolution or JPG images out of it, due to insufficient documentation.
Apr
10
comment Trouble with VGA Controller on CPLD
A general comment: in your code, you say you are making "state machines" for V_SYNC and H_SYNC, but it looks to me like those always blocks will just make combinational logic. The only state machine-ish thing you have currently is the counter.
Mar
26
comment RF Design: A Bluetooth Repeater
Sounds like you could use a solid-state RF switch, although you haven't specified isolation requirements.
Feb
17
comment Raw access to CMOS image sensor?
Some sensors have a "decimation" mode where pixels are skipped, but you still have to read it out line by line.
Dec
3
comment What happens to copper pours that are 'too narrow'?
It seems you can also remove orphans.
Nov
29
comment How to hand drill PCBs?
My experience with the Dremel drill press is that there's too much slop for this application. Fiberglass doesn't have much give, so the little bits snap very easily. Maybe it'd be okay for phenolic PCBs, but I would get a "real" drill press.
Oct
10
comment Spice model, can't figure it out
According to this page the default is KP=2E-5. So I would try adding that parameter to the model and seeing if the result changes.
Oct
5
comment How to go from a development board to a production board
Open source PCB tools (KiCAD, gEDA) export gerbers and won't lock you into any particular vendor.
Sep
29
comment Affordable stereo vision camera for industrial applications?
Yes, if you want anything else, you have to figure it out yourself. For example, I was using a single camera over serial, but I had to flash an alternate firmware to enable that capability. Anything more substantial and you have to roll it yourself.
Sep
27
comment Affordable stereo vision camera for industrial applications?
I haven't used the Surveyor in stereo, but I believe the wifi is used to encapsulate a serial connection. The thing about the Surveyor stuff is that it's set up for a default application/api. There's not much of a user community, so there's a lot to figure out on your own. Also, instructions for things like reprogramming the binfile are scattered around the forum. That said, the platform is open source.
Sep
19
awarded  Yearling
Sep
16
comment Which WiFi Module?
Could elaborate on the auth difficulties you're having?
Sep
3
comment Implementation ideas for software defined radios
Then you'll have to wait a few years. Right now even the "revolutionary" Per Vices Phi is $750.
Sep
2
comment Implementation ideas for software defined radios
Please define "budget-friendly".