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by jasonclark
Mon Jul 08, 2019 10:57 am
Forum: General programming discussion
Topic: Can the Raspberry Pi Run the LabVIEW runtime engine?
Replies: 2
Views: 1017

Re: Can the Raspberry Pi Run the LabVIEW runtime engine?

Hi regulary use LabVIEW in the day job, usually on Win32/64. NI should be able to create a Pi version of their RunTime Engine - they do support some Arm boards and their RealTime OS is embedded Linux, so they do have the expertise for this. NI have an Idea exchange, so perhaps ask (or Search) here. ...
by jasonclark
Wed Apr 19, 2017 12:31 pm
Forum: Advanced users
Topic: Wiress Access Point - automatically pick best Wifi Channel
Replies: 2
Views: 3078

Wiress Access Point - automatically pick best Wifi Channel

Hi there! I've a project that requires the Pi3 to be a Wireless Access point. I've successfully configured this using Hostapd and it's working well. (Linky: https://frillip.com/using-your-raspberry-pi-3-as-a-wifi-access-point-with-hostapd/ ) However, I know from bitter experience that 2.4Ghz Wifi is...
by jasonclark
Tue Oct 04, 2016 9:18 pm
Forum: General discussion
Topic: help (opencv)
Replies: 1
Views: 476

Re: help (opencv)

Sure, this can be done. It only needs some coding.. :D Get OpenCV to do your detection and use a text to speech toolkit to play the sound. https://learn.adafruit.com/speech-synthesis-on-the-raspberry-pi/introduction It sounds a neat project - what are you planning to detect? I've used OpenCV with Py...
by jasonclark
Tue Oct 04, 2016 9:10 pm
Forum: General discussion
Topic: Temperature in sealed case
Replies: 16
Views: 4272

Re: Temperature in sealed case

In my experience, conduction to the walls of the enclosure (if it's a metal enclosure) works really well. Also trying to put the enclosure in the shade. On a RPI, conduction is a problem if you're using hats as they are exactly where your heat spreader will go (use an extension cable?). Heat sinks w...
by jasonclark
Wed Jun 08, 2016 7:35 pm
Forum: General discussion
Topic: PLC / Industrial I/O "shield" for any of the RPi's?
Replies: 11
Views: 9178

Re: PLC / Industrial I/O "shield" for any of the RPi's?

If possible, use the Pi as a ModBUS master (TCP or RS485), then use Remote GPIO modules. This pretty much means you just need to connect it to the control network and configure the Pi firewall to only allow traffic on Port 502 (default ModBUS port), or get a UART to 485/422 driver. Going TCP would m...
by jasonclark
Wed May 11, 2016 12:04 pm
Forum: General discussion
Topic: 5.8GHz Receiver
Replies: 3
Views: 4375

Re: 5.8GHz Receiver

Check out some of the kit used by FPV (drones) They'll usually have long distance video links.
A the long distance stuff uses a directional base station for the radio link.
by jasonclark
Wed May 11, 2016 11:53 am
Forum: General discussion
Topic: Raspberry + display adafruit +kodi
Replies: 7
Views: 1628

Re: Raspberry + display adafruit +kodi

I think so. I've got the 2.8" Resistive display and it'll function as a normal display... with some limitations. I sped up the SPI bus and increased the SPI buffer size, I can't remember all the tweaks but it allowed higher frame rates. If you have the kit, give it a try. You can set the screen reso...
by jasonclark
Wed Apr 20, 2016 2:04 pm
Forum: General discussion
Topic: Anyone know if LabVIEW is available for ARM?
Replies: 10
Views: 11270

Re: Anyone know if LabVIEW is available for ARM?

LabVIEW did support ARM: http://sine.ni.com/nips/cds/view/p/lang/en/nid/209852 However, any hardware related will need support code written. It looks like this product has been discontinued. I use LabVIEW professionally and it's great tool for rapid development. It's not always the right tool for th...
by jasonclark
Fri Apr 15, 2016 11:57 pm
Forum: General discussion
Topic: Pi Zero new feature
Replies: 169
Views: 31953

Re: Pi Zero new feature

I'd love D+/D- for USB... Not an extra USB port, but just the signals from the main connector.

Would allow HATs to provide USB functionality (Wifi/Ethernet/Webcam etc)
by jasonclark
Wed Mar 02, 2016 12:28 pm
Forum: Automation, sensing and robotics
Topic: face recognition
Replies: 2
Views: 888

Re: face recognition

Hi, check out OPENCV. This is an open source image library. It is compiled for the Pi with bindings for Python. It's not clear if you want to recognise a face and any faces? When I looked into this, it worked pretty well. I could get about 5fps on a Pi after optimisation (reduce detection image to g...
by jasonclark
Sat Feb 27, 2016 1:11 pm
Forum: Off topic discussion
Topic: 3D Printer
Replies: 70
Views: 22484

Re: 3D Printer

I had an i3, something I made myself. The main issue with i3 is the upright frame is not securely attached. Any forces acting on it will cause a wobble which really hits your print. I've since acquired a MendelMax from a contact. This is made from extruded alloy and so is very rigid. Regarding the f...
by jasonclark
Thu Dec 11, 2014 4:13 pm
Forum: Off topic discussion
Topic: Connecting Two Pies
Replies: 9
Views: 1769

Re: Connecting Two Pies

Use the UART. 3-wire serial. If the PI are close to each other, no need to level shift to RS232, just run as TTL UART. TX > RX RX > TX GND > GND Open the TTY port and send/receive data and commands. Easier to debug than Ethernet, slower than Ethernet, but will then free up Ethernet for other stuff. ...
by jasonclark
Mon Aug 11, 2014 3:38 pm
Forum: Automation, sensing and robotics
Topic: How to connect RS485 module to raspberrypi
Replies: 6
Views: 45481

Re: How to connect RS485 module to raspberrypi

Hi, you'll need a 485 line driver connected to the Raspberry PI's UART. You'll then use the Raspberry PI's Serial power to communicate with your module. I've found a shield that would help with the electronics for you; https://www.sparkfun.com/products/12826 This appears to give 2-wire RS485, so if ...
by jasonclark
Fri Mar 07, 2014 10:51 am
Forum: Automation, sensing and robotics
Topic: Approximate WiFi range
Replies: 5
Views: 2349

Re: Approximate WiFi range

Try to get a unidirectional antenna (homebrew Pringle Can is a nice hack), this will work well if both points don't move and you really only want point to point connections.
by jasonclark
Sun Feb 23, 2014 11:40 pm
Forum: Automation, sensing and robotics
Topic: I2C Bus Problem: Too many devices?
Replies: 4
Views: 1775

Re: I2C Bus Problem: Too many devices?

Additional informations: No defective contact. & Each device has its own i2c address. It's enough to drive one to despair. :( I2C signals are pretty weak compared to SPI. A few years ago I was involved with a project that used an I2C mux, that may be something to consider and it will buffer the sig...
by jasonclark
Sun Dec 29, 2013 6:08 pm
Forum: Advanced users
Topic: How external Audio Card perform digitization on voice signal
Replies: 2
Views: 884

Re: How external Audio Card perform digitization on voice si

You could use an ADC over SPI, but I don't image it will be able to provide high sample rates (no proof of this though!) A USB sound "card" would be my preference and should provide a good sample rate. These can be found on ebay fairly cheaply and if its a "class compliant device" should not require...
by jasonclark
Sat Dec 28, 2013 9:26 am
Forum: Automation, sensing and robotics
Topic: AC motor connected to Raspberry Pi
Replies: 6
Views: 3891

Re: AC motor connected to Raspberry Pi

Hi, I used to be in the motion control industry and my employer used to sell Yaskawa drives+motors. You will need the correct servo drive for this. It'll take single phase power and manage everything for you. The drives can run in a few different modes- Torque control (you provide +/-10V as a torque...
by jasonclark
Thu Nov 14, 2013 10:45 pm
Forum: Advanced users
Topic: raspberry pi ECM for cars?
Replies: 14
Views: 12032

Re: raspberry pi ECM for cars?

thanks for the info! the reason why I asked this was because I would rather make my own ECM, so I can buy any motor and make the necessary adjustment need to make the engine run right, I dont want to have to pay for abunch of money for a probably expensive ECM to use on one engine. Do you guys know...
by jasonclark
Mon Aug 19, 2013 10:39 pm
Forum: General discussion
Topic: NI Driver compatible with Raspian?
Replies: 6
Views: 2548

Re: NI Driver compatible with Raspian?

I attended the NI Days in London last November and part of the final talk did concern the Pi and they coded some drivers for their USB modules. I've found the article; https://decibel.ni.com/content/docs/DOC-25806 For more flexible IO, something like the Gertboard may be more Pi orientated, even mor...
by jasonclark
Thu Aug 08, 2013 9:03 pm
Forum: Other projects
Topic: Using a Guzunty to multiplex ADC's
Replies: 27
Views: 3713

Re: Using a Guzunty to multiplex ADC's

> Looking into it more, 100us should be okay. Ok for what? :-) 100us jitter p-p should not be an issue I understand the CPLD will do the multiplexing and get the conversions. Can it also stream the data out, so a double-buffer an array of 10 elements (conversions). SPI comms to PI with a very simpl...
by jasonclark
Sat Jul 27, 2013 1:10 pm
Forum: Beginners
Topic: PI with Amiga ?
Replies: 11
Views: 3452

Re: PI with Amiga ?

The interfacing options are going to be; [*]Networking, so TCP/UDP sockets [*]Serial (RS232 port on the Amiga) [*]Possibly Parallel Its been years since I did anything on an Amiga so can't remember what hardware it has, I assume there is some way of getting Ethernet on it? I guess a project could be...
by jasonclark
Mon Apr 15, 2013 6:38 pm
Forum: General discussion
Topic: supercapactiors
Replies: 8
Views: 1447

Re: supercapactiors

I've got a lithium battery pack for charging my phone. This has a built-in microusb and can source 2A. It can also take a charge from a MicroUSB charger... From Amazon my 9000mAH unit was ~£25 I dont think capacitors would work very well without a boost regulator, once the supply drops to 4.6V, the ...
by jasonclark
Sun Apr 14, 2013 3:52 pm
Forum: Bare metal, Assembly language
Topic: Multiple USB to Serial Converters
Replies: 8
Views: 2397

Re: Multiple USB to Serial Converters

I'm fairly sure Linux will simply find this device.... but as you've posted in the Bare Metal section, I'm not sure what you're looking for. If you're running Linux, you should get a bunch of /dev/ttyUSB0...6 devices to use. Otherwise, I've previously used Ethernet to Serial modules. These are expen...
by jasonclark
Sat Apr 13, 2013 3:29 pm
Forum: General discussion
Topic: DIY electronics and regulations
Replies: 6
Views: 2459

Re: DIY electronics and regulations

Its a bit of a pain :roll: I'm a product dev. manager, I mainly sub out the CE stuff as we don't have the expertise in-house and EMC testing needs a proper test house. The basics are; You need to CE mark the product for use in the EU. A CE mark is basically a statement to say its been tested/evaluat...
by jasonclark
Sun Apr 07, 2013 2:08 am
Forum: General discussion
Topic: installing chrome/chromium
Replies: 2
Views: 9772

Re: installing chrome/chromium

Has anybody had success installing Chrome or Chromium on the Pi. I tried both the amd64, as well as the i386, to no avail, due to it not matching my system (armhf), so the error says. sudo apt-get install chromium or sudo apt-get install chromium-browser Should work (not at my pi or other linux box...

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