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by lardconcepts
Sat Mar 09, 2019 2:29 pm
Forum: For sale
Topic: Where to sell my partially developed assistive audio PI case?
Replies: 9
Views: 1817

Re: Where to sell my partially developed assistive audio PI case?

rpiMike wrote:
Sat Mar 09, 2019 2:13 pm
I was the only bidder! Result :)
Yay - this is most satisfying to see!
by lardconcepts
Sat Mar 02, 2019 3:02 pm
Forum: For sale
Topic: Where to sell my partially developed assistive audio PI case?
Replies: 9
Views: 1817

Re: Where to sell my partially developed assistive audio PI case?

Can't really change the listing in the last 2 days of the sale - sorry! Yes, the SPI interface is pretty simple - here's some of the info from the company that made the panel.... - excuse the formatting, I'm copying off a PDF.... hope it helps! "When the RPi asks for data on the SPi we send the firs...
by lardconcepts
Sat Mar 02, 2019 11:31 am
Forum: Assistive technology and accessibility
Topic: Where to sell my partially developed assistive audio PI case prototypes and design?
Replies: 3
Views: 1291

Re: Where to sell my partially developed assistive audio PI case prototypes and design?

I've listed the whole project as one "lot" on ebay at http://ebay.us/UF4HuL?cmpnId=5338273189 Control panel circuit with illumination - SPI interface Alternative firmware (control panel lights normally on vs normally off) Soft-touch panel PCB layout files All PDF and IGS design files etc - photos on...
by lardconcepts
Sat Mar 02, 2019 11:30 am
Forum: For sale
Topic: Where to sell my partially developed assistive audio PI case?
Replies: 9
Views: 1817

Re: Where to sell my partially developed assistive audio PI case?

I'd be very interested in buying one of these. Hi there Solar! Well, I went and listed the whole project as one "lot" on ebay at http://ebay.us/UF4HuL?cmpnId=5338273189 Control panel circuit with illumination - SPI interface Alternative firmware (control panel lights normally on vs normally off) So...
by lardconcepts
Sun Feb 24, 2019 6:17 pm
Forum: Assistive technology and accessibility
Topic: Where to sell my partially developed assistive audio PI case prototypes and design?
Replies: 3
Views: 1291

Re: Where to sell my partially developed assistive audio PI case prototypes and design?

Wow - that Memory Loss Player looks cool! I just had a look at the postage - at 1.2kg with dimensions of 24x24x31cm I'm getting around £20 cheapest for 5 day+ Canada Post service, which is CA$34.30. I think ebay is really the only place - I'll post the link here once it's up there and live if that's...
by lardconcepts
Sun Feb 24, 2019 12:26 pm
Forum: For sale
Topic: Where to sell my partially developed assistive audio PI case?
Replies: 9
Views: 1817

Where to sell my partially developed assistive audio PI case?

I'm not sure whether it'll be allowed over in https://www.raspberrypi.org/forums/viewforum.php?f=102 but way back in 2012, before Alexa etc, I was given a grant to develop PI-based assistive radios for the blind at what was intended to be a more affordable price than the only other device available ...
by lardconcepts
Wed Oct 09, 2013 5:25 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DACs?
Replies: 8
Views: 13966

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

http://www.ebay.co.uk/itm/DAC-NOS1-Non-Over-Sampling-DAC-TDA1543T-I2S-Input-/230911367940?pt=LH_DefaultDomain_0&hash=item35c363db04 Works great with I2S driver. Hmm, the only thing is, that module is over double the price of the other two and isn't populated with the outputs. So, I'd like to try ge...
by lardconcepts
Wed Oct 09, 2013 3:09 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DACs?
Replies: 8
Views: 13966

Re: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DA

These look rather interesting, particularly the 2nd one (big fan of keeping things digital for as long as possible). Indeed. Just what I was thinking. I expect you'll have to locate some i2s drivers before you get too far with testing them, not sure if any have been developed. Yeah... well, there's...
by lardconcepts
Wed Oct 09, 2013 12:49 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DACs?
Replies: 8
Views: 13966

Opinions on these cheap i2s S/PDIF/ TOSLINK/ analogue DACs?

I've been reading a fair few threads regarding high quality audio and, correct me if I'm wrong, but as I have no spare USB port (and they are exposed to the outside world and the DAC must be inside the box) then my choice is to get busy with a soldering iron and some pins on P5 and get an i2s DAC. O...
by lardconcepts
Sun Oct 06, 2013 9:31 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI to Arduino slave with wiringPI2 on Raspberry PI master?
Replies: 5
Views: 13038

Re: SPI to Arduino slave with wiringPI2 on Raspberry PI mast

Hi Drogon, Thank you SO much for your very quick reply - I am sorry I didn't thank you earlier, but for some reason I appear to have defaulted to "don't notify when reply posted" so I only just saw it - changed it back now. And thank you also for the top tip about sprintf formatting the data to send...
by lardconcepts
Thu Oct 03, 2013 8:14 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI to Arduino slave with wiringPI2 on Raspberry PI master?
Replies: 5
Views: 13038

Re: SPI to Arduino slave with wiringPI2 on Raspberry PI mast

I'm trying to do some communicating between the Raspberry PI and the Arduino. I'm using Nick Gammon's excellent page on Arduino SPI and Gordon Henderson's also-excellent WiringPI, which implements Wiring on a PI, along with his SPI library . Examples for Gordon's PI SPI library are sparse, but follo...
by lardconcepts
Fri Sep 27, 2013 5:30 pm
Forum: Other projects
Topic: Triple output in-case power supply?
Replies: 2
Views: 1402

Re: Triple output in-case power supply?

I've only ever had two of those. On both of them, when fed 12v, the 5v voltage regulators failed and supplied 12v to the 5v side of my project, frying everything in its path. Several evening's soldering (I'm a slow worker) gone in a split second. Now you've got me worried! I've got a PI, an Arduino...
by lardconcepts
Fri Sep 27, 2013 3:45 pm
Forum: Graphics, sound and multimedia
Topic: Breaking out USB to drive this PCM2704 USB DAC board?
Replies: 0
Views: 1172

Breaking out USB to drive this PCM2704 USB DAC board?

So, these *£12 PCM2704 DAC breakout boards look interesting. And the 2704 seems to be OK according to the "things that work with the PI" page. The problem is, the 2 USB ports are both in use, and already flush with the edge of my project box so no room for a hub. I was wondering if anyone knew of a ...
by lardconcepts
Fri Sep 27, 2013 3:32 pm
Forum: Other projects
Topic: Triple output in-case power supply?
Replies: 2
Views: 1402

Triple output in-case power supply?

I think we've probably all got a drawer full of those ubiquitous £1.50 YWRobot 3v3 / 5v breadboard PSUs. But hours of ebay and forum trawling has failed to turn up something similar that could be a "one source 3 output in-box supply". Let's say I want to house a PI, and something that requires 5v, a...
by lardconcepts
Thu Sep 12, 2013 2:39 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI to Arduino slave with wiringPI2 on Raspberry PI master?
Replies: 5
Views: 13038

Re: SPI to Arduino slave with wiringPI2 on Raspberry PI mast

I bought a £10 logic analyser which helped a lot, so I'm now at the stage where I've got something working. I've documented and written up the whole thing along with code and Fritzing diagrams, installation guide etc. https://gist.github.com/lardconcepts/6528855 It works. Just. But the code is horri...
by lardconcepts
Sun Sep 01, 2013 7:15 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: What do I need to install to get SPI on the Pi?
Replies: 22
Views: 17775

Re: What do I need to install to get SPI on the Pi?

It's a bit tricky, isn't it?! I cracked it with Python sending data from the PI as master to a an Arduino as slave (see below - and if you're going to do this or the other end is 5v, put a level shifter to protect the PI from Arduino's 5v! The Adafruit 4 channel shifter is on ebay from Phenoptix in ...
by lardconcepts
Sun Sep 01, 2013 7:05 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI to Arduino slave with wiringPI2 on Raspberry PI master?
Replies: 5
Views: 13038

SPI to Arduino slave with wiringPI2 on Raspberry PI master?

After a bit of a fight, I managed to get wiringpi2 and the the wiringpi2 python wrapper installed on the NOOBS Raspbian PI distro. The Adafruit 4 channel logic level converter kept the PI safe and sending data to the Arduino was as simple as this on the PI side: import wiringpi2 wiringpi2.wiringPiSP...
by lardconcepts
Mon Jun 03, 2013 7:51 am
Forum: Graphics, sound and multimedia
Topic: Which (new?) distro to play Flash audio?
Replies: 1
Views: 492

Which (new?) distro to play Flash audio?

I see I have a choice of 4 distros today and I was wondering if any of the new or updated ones make Flash audio (ie: RTMP) streams any easier to play? Does "native mmap support in the bcm2835 ALSA driver" make things any easier? I see lots of threads about playing RTMP video streams like: http://www...
by lardconcepts
Mon May 06, 2013 11:42 am
Forum: Wanted
Topic: Mid-Wales: UK Programmer wanted for GPIO/audio project.
Replies: 1
Views: 1501

Re: Mid-Wales: UK Programmer wanted for GPIO/audio project.

Hello! Found someone - thanks to those who replied. OK, the response wasn't exactly overwhelming and I can't pretend I spent my days sifting through replies, but there are some talented people out there.

Thanks again.
by lardconcepts
Thu Apr 25, 2013 7:42 am
Forum: Wanted
Topic: Mid-Wales: UK Programmer wanted for GPIO/audio project.
Replies: 1
Views: 1501

Mid-Wales: UK Programmer wanted for GPIO/audio project.

Any ideas where I'd find a UK-based experience Pi programmer? My problem is that I go looking and then find that everyone is a programmer, just like everyone is a webdesigner. However, I'm looking for "programmer" beyond the meaning of "I can type stuff into a command prompt". There's project fundin...
by lardconcepts
Wed Mar 06, 2013 12:57 pm
Forum: Other projects
Topic: A little help needed with case hardware terminology?
Replies: 4
Views: 1015

Re: A little help needed with case hardware terminology?

THANK YOU both so much! It's amazing what you can find when you use the right words!

4 different styles of rubbery, silicon things winging there way to me right now thanks to your suggestions.

I'll let you know how I get on!
by lardconcepts
Wed Mar 06, 2013 10:57 am
Forum: Other projects
Topic: A little help needed with case hardware terminology?
Replies: 4
Views: 1015

A little help needed with case hardware terminology?

I'm constantly astonished looking through the many wood, aluminium and other cases on this forum and elsewhere, at the talent and ingenuity on display. I've got a specific need for just a couple of cases of a certain specific size (about 100mm cube), so none of the projects or pre-mades really fit, ...
by lardconcepts
Sun Mar 03, 2013 8:59 pm
Forum: Python
Topic: Magpi Python tutorials
Replies: 21
Views: 2095

Re: Magpi Python tutorials

I will be making a new release later this weekend that adds edge detection and interrupt functionality. You are a man of your word! I've been watching bits and pieces happen on Google Code over the weekend, and then suddenly, this treat appears! https://code.google.com/p/raspberry-gpio-python/ - 0....
by lardconcepts
Sat Mar 02, 2013 10:02 am
Forum: Beginners
Topic: Fastest safe shutdown from command prompt?
Replies: 6
Views: 1558

Re: Fastest safe shutdown from command prompt?

hexelpdkk wrote:
lardconcepts wrote:Running poweroff gets all the services to shut down - how long does this take on your system?
From desktop, it goes to flashing cursor almost immediately.
Then 20 seconds of that, then 3 more seconds of flashing LED. So 23 seconds total.

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