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by BlackSuit
Fri Mar 27, 2015 10:32 am
Forum: Automation, sensing and robotics
Topic: Lego NXT Ultrasonic Sensor and the Raspberry Pi - Solution
Replies: 1
Views: 1315

Lego NXT Ultrasonic Sensor and the Raspberry Pi - Solution

I always want to connect my Raspberry Pi, my favorite SBC with Lego Mindstorms, my favourite robot building kit. One important step would be the combination of NXT Sensors with the Raspberry Pi. And although sensor uses I2C, a direct connection is not possible. As far as I know there no projects pub...
by BlackSuit
Fri Jan 09, 2015 11:35 am
Forum: General discussion
Topic: Using NXT Motors Through GPIO Pins?
Replies: 12
Views: 3580

Re: Using NXT Motors Through GPIO Pins?

Have you actually tried? Perhaps the code could be tuned? If the encoder sends 720 pulses per revolution it would only be 7200 pulses per second if it was running at 600 RPM. That seems quite fast for a hobby robot. Just because some software libraries can't do 1 kHz PWM (which?) it doesn't mean th...
by BlackSuit
Fri Jan 09, 2015 10:48 am
Forum: General discussion
Topic: Using NXT Motors Through GPIO Pins?
Replies: 12
Views: 3580

Re: Using NXT Motors Through GPIO Pins?

Rotary encoders and the Pi may or may not be a common problem. If it is, it is a problem based in ignorance. C, C++, and Python rotary encoder examples . Some timing tests results for regular pulses generated by a microcontroller are shown here . The Pi B++ provides two hardware PWM channels. Addit...
by BlackSuit
Fri Jan 09, 2015 8:55 am
Forum: General discussion
Topic: Using NXT Motors Through GPIO Pins?
Replies: 12
Views: 3580

Re: Using NXT Motors Through GPIO Pins?

The NXT Motor is a 9V DC motor with a rotary encoder build in. The rotary encoder works with 4.3 V levels (5V - diode voltage drop), so do not directly connect it to your pi. A common problem with connecting any type of rotary encoder to the raspberry pi is, that you have to make sure to read out it...
by BlackSuit
Mon Nov 10, 2014 6:05 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

A competitor designed exactly this product. If you do not consider them completely stupid, they had more in mind than just my personal needs. But they failed to make any more than one batch. Why do you think that was? (This is the second time I've asked you this question. If you're in business you ...
by BlackSuit
Mon Nov 10, 2014 5:52 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

On the say that brought us the A+ this is the most superfluous thread, kept alive by two or three people who are dreaming of something that will never happen: a RPi fitting their special personal needs (but not of many others). Please read the whole discussion, I have stated multiple times why smal...
by BlackSuit
Mon Nov 10, 2014 5:25 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

Not sure why you think 'we' were anywhere near such a product. No-where near would be closer. What you are suggesting is a complete re-design. The A+ is a mod of the B+ on a smaller board. But much smaller = much more expensive - the PCB's cost more, the components cost more. It's the reason the Pi...
by BlackSuit
Mon Nov 10, 2014 5:07 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

Interestingly you are the first to mention RPF's educational mission so far in this threat. All the previously mentioned concerns ironically were around profit. This product would support the foundations educational mission the way almost all other RPIs produced do: By earning money for the foundat...
by BlackSuit
Mon Nov 10, 2014 4:36 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

Well, Olimex, Edison, etc are not replacement for RPi, they do not have graphics capabilities at all! And graphic capability does not equal hdmi. You can use opengl and other functionality without the need for video out. It is hard to find a good alternative to RPi that is powerful enough. Micro si...
by BlackSuit
Mon Nov 10, 2014 4:14 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

There are many application accesing the internet, either by WLAN or Ethernet. <snip> Therefore a small embedded linux would be my first choice for such applications - even if its just switching the light. But if the embedded Linux was too bulky (which the raspi is) - what would be your second choic...
by BlackSuit
Mon Nov 10, 2014 3:55 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

If you don't need HDMI, Video, Audio etc, why on earth would you use a Raspberry Pi?. Because its base is linux, it has a highly secure und well elaborated networking stack, including wlan drivers. And well documented access to its low level hardware like SPI, I2C and GPIO. A huge community, helpfu...
by BlackSuit
Mon Nov 10, 2014 3:42 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

I aggree. None of the current RPI models fits for small embedded applications. I honestly don't agree - what application do you have in mind? Remember, the Raspberry Pi is not a microcontroller. Once you have an adequate battery, it will be a much bigger package. I really think compactness fans sho...
by BlackSuit
Mon Nov 10, 2014 3:12 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

How many small embedded applications can you think of? One's that are so small that the really quite small already A+ cannot cope with? Wearables? Small market. Robots? Going to be pretty small robots if the A+ is too big. Drones? A+ should be fine. I'm just not seeing a big enough market to make t...
by BlackSuit
Mon Nov 10, 2014 2:53 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

It's easy* enough to remove the 40-way pin header from an A+ if you just need a few wires to attach to GPIO pads and don't care about destroying the pins in the process. * Minimum soldering iron 40W - the ground pins require a lot of heat to extract. Which does not make the pcb smaller or moves the...
by BlackSuit
Mon Nov 10, 2014 2:11 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

Not the Foundation's core business - and a lot of effort for very little market since the CM covers most industrial use cases already. For example, the ODROID-W has sold < 5000 units. That wouldn't pay for the dev costs. The huge majority of people are already covered by the B+, A+ and CM. I think ...
by BlackSuit
Mon Nov 10, 2014 12:18 pm
Forum: General discussion
Topic: Micro factor RPi?
Replies: 63
Views: 5501

Re: Micro factor RPi?

Hi, Was wondering, are there any ideas or plans for micro factor RPi? The current designs (including A+) are still very bulky and therefore not suitable for some applications. It would be really nice to have a DIY RPi: - remove all pins and let the user solder pins they might want - remove some of ...
by BlackSuit
Wed Oct 01, 2014 5:43 pm
Forum: General discussion
Topic: Making a tool to install encrypted/customised Raspbian
Replies: 7
Views: 1333

Re: Making a tool to install encrypted/customised Raspbian

There seems to be a tool called cryptsetup-reencrypt for easy re-encryption of LUKS devices. Just one line to change the main key. # cryptsetup-reencrypt -c twofish-xts-plain64 /dev/sde1 from here: http://asalor.blogspot.de/2012/08/re-encryption-of-luks-device-cryptsetup.html With this tool it shoul...
by BlackSuit
Wed Oct 01, 2014 9:28 am
Forum: General discussion
Topic: Making a tool to install encrypted/customised Raspbian
Replies: 7
Views: 1333

Re: Making a tool to install encrypted/customised Raspbian

I think what you're doing is largely pointless and will have a very limited audience. I do not agree, I think we have to establish a culture of encryption in the internet to avoid the omnipresent surveillance by all kinds of agencies. Encrypting the OS and personal data is a first, but important st...
by BlackSuit
Thu Aug 28, 2014 6:24 pm
Forum: Off topic discussion
Topic: No Odroid W - Broadcom will not supply the SoC to Hardkernel
Replies: 16
Views: 17456

Re: No Odroid W - Broadcom will not supply the SoC to Hardke

They had some SoCs for the inital batch. So someone has sold them. What I find hard to believe is they've aquired the BCM2835 and none of the Broadcom engineer's knew about it. So either Hardkernel are lying about their source of SoCs (most likely old stock from another company like Roku) or Broadc...
by BlackSuit
Thu Aug 28, 2014 5:56 pm
Forum: Off topic discussion
Topic: No Odroid W - Broadcom will not supply the SoC to Hardkernel
Replies: 16
Views: 17456

Re: No Odroid W - Broadcom will not supply the SoC to Hardke

Don't spread rumors that you cannot prove. It seems more probable that Hardkernel never had any contract with Broadcom (none of the people here working for Broadcom had any information about it.) Now, when it comes to delivery they say on there website: Broadcom will not supply the SoC to Hardkerne...
by BlackSuit
Thu Aug 28, 2014 5:18 pm
Forum: Off topic discussion
Topic: No Odroid W - Broadcom will not supply the SoC to Hardkernel
Replies: 16
Views: 17456

No Odroid W - Broadcom will not supply the SoC to Hardkernel

I know that many people here don't like Odroid-W (http://www.hardkernel.com/main/products/prdt_info.php?g_code=G140610189490) because they consider it a stupid clone of the RPI. In my opinion it wasn't - it was a completely new form factor inbetween standart RPI and the complicated RPI compute modul...
by BlackSuit
Tue Jan 29, 2013 3:51 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Siemens S65 Display - Access with C
Replies: 7
Views: 3606

Re: Siemens S65 Display - Access with C

May I ask if you tried to experiment with SPI speed? The problem is that I couldn't get any difference with the clock divider higher than 128 / 256. So with the divider 32 (you use) my setup doesn't give me an acceptable fill rate. I have found that the native clock rate for LS020 is about 13MHz, s...
by BlackSuit
Wed Oct 24, 2012 8:55 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to install i2c-tiny-usb module ??
Replies: 1
Views: 1429

Re: How to install i2c-tiny-usb module ??

I have rebuild the kernel with the i2c-tiny-usb modul, now it is working. Unfortunately it seems that the one of the build-in i2c modules dissappears, when i2c-tiny-usb is loaded: i2cdetect -l i2c-0 unknown i2c-tiny-usb at bus 001 device 005 N/A i2c-1 unknown bcm2708_i2c.1 N/A Why is that ? Thx.
by BlackSuit
Mon Oct 22, 2012 11:01 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: WiFi (NOT USB)
Replies: 4
Views: 1583

Re: WiFi (NOT USB)

There are some Wifi Shields for Arduino using SPI to connect to the Arduino AVR. So it is possible to connect wifi to GPIO. But this shields are far more expensive than any USB-Wlan adapter and I think there no linux drivers available ( :?: ).
by BlackSuit
Sun Oct 21, 2012 6:15 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to install i2c-tiny-usb module ??
Replies: 1
Views: 1429

How to install i2c-tiny-usb module ??

Hi all, I know that the pi has i2c on its pin headers, nevertheless I want to try other solutions. Therefore I have build the usb-i2c Module described here http://www.harbaum.org/till/i2c_tiny_usb/index.shtml It is succesfully discovered by lsusb :D Unfortunately the corresponding i2c-tiny-usb modul...

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