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by geoffr
Tue May 17, 2016 11:01 pm
Forum: General discussion
Topic: A picture from The Pi Hut
Replies: 283
Views: 47638

Re: A picture from The Pi Hut

It would be nice if people would grow up and stop whinging about shipping costs I think most people would stop complaining about price of Zero shipping if they could buy more of them and/or buy them at their local distributor. Currently one per customer rule at few selected UK/US distributors sadly...
by geoffr
Tue May 17, 2016 7:34 am
Forum: General discussion
Topic: A picture from The Pi Hut
Replies: 283
Views: 47638

Re: A picture from The Pi Hut

The pi hut shipping is only like 8 bucks. To Alabama US I have to admit that it is a little ironic that it seems to be easier to get items shipped to the US or Australia than some parts of continental Europe. What is also ironic is that the shipping charge from the Pi Hut of GBP 4.00 which is about...
by geoffr
Mon May 16, 2016 4:17 am
Forum: General discussion
Topic: A picture from The Pi Hut
Replies: 283
Views: 47638

Re: A picture from The Pi Hut

karrika wrote:Good Morning,

it is Monday. Waiting for someone to spill the beans.
Actually, it's Monday afternoon in Melbourne already..... No beans sighted here yet....
by geoffr
Thu May 05, 2016 6:28 am
Forum: General discussion
Topic: No news is... no news.
Replies: 6
Views: 1328

Re: No news is... no news.

The other day ordered a pi zero with the supposed new feature. if I can spot it when the zero comes in later this week I'll tell if this batch really has a new feature. I probably won't tell what it is but I'll confirm or deny the rumors. If you are referring to the small batch that the Pi Hut had ...
by geoffr
Mon May 02, 2016 2:28 am
Forum: General discussion
Topic: Raspberry PI Zero back in stock @ PiHut (thepihut.com)
Replies: 20
Views: 4503

Re: Raspberry PI Zero back in stock @ PiHut (thepihut.com)

gmc wrote:Pity its only available in kit - I'm just looking for the pi. :(
I decided to bite the bullet and order the kit. I guess I land up buying an expensive microSD card. Maybe I should frame it :shock:
by geoffr
Sat Apr 30, 2016 8:10 am
Forum: General discussion
Topic: Raspberry PI Zero back in stock @ PiHut (thepihut.com)
Replies: 20
Views: 4503

Re: Raspberry PI Zero back in stock @ PiHut (thepihut.com)

Hi! Same for me, just bought one from Pi Hut, have been waiting 2 weeks, just realize by reading this thread it's not the new zero. Doesn't matter it's a Pi. My first zero. And it's going to become a collector model :D I was a bit disappointed that they only had the kits with the 8GB cards. I would...
by geoffr
Fri Apr 22, 2016 12:22 am
Forum: General discussion
Topic: Choosing the correct DIGI+ Board. HifiBerry interrupting.
Replies: 22
Views: 3322

Re: diy powersupply interrupting

Have an electrician check your mains supply and wiring. It sounds like there could be a serious problem there. Only when that is checked and found OK should you consider an extra capacitor on your supply. I would tend to agree - while I am not an expert on sizing a cap for smoothing the output of a...
by geoffr
Thu Apr 21, 2016 12:08 pm
Forum: General discussion
Topic: PiZero Roadmap
Replies: 159
Views: 63619

Re: PiZero Roadmap

Good morning, I am part of the staff of the Italian Community site of the Raspberry Pi users (http://www.raspberryitaly.com). I wanted to highlight the situation to the outside of the UK or USA. For us Italians, buy a Pi Zero is not convenient. And we are still in the EU. For a device to be $ 5, we...
by geoffr
Wed Apr 20, 2016 12:16 pm
Forum: Troubleshooting
Topic: STICKY: WiFi Dongle Issues ? Start here !
Replies: 581
Views: 666201

Re: WiFi Issues ? Start here !

I've been running into some funnies with WiFi on my Pi Zero, particularly with WiFi dropping out. On the zero, my logs indicate that it is failing to authenticate to the AP (Netgear D6200). When I reboot that AP, the zero successfully authenticates with the other AP (Apple Airport Express), which is...
by geoffr
Tue Apr 19, 2016 4:39 am
Forum: General discussion
Topic: PiZero Roadmap
Replies: 159
Views: 63619

Re: PiZero Roadmap

(Forget the fact that the CHIP "retails" for USD 9.00 - it has no community.) It also has no on-board video other than composite. The cheapest option for anything better is VGA for $15, making a *working* system....$24, which is rather more than your low-ball figure fora working Pi Zero. Good point...
by geoffr
Mon Apr 18, 2016 11:28 pm
Forum: General discussion
Topic: PiZero Roadmap
Replies: 159
Views: 63619

Re: PiZero Roadmap

People think about new CPU/RAM need to drop their expectations - those are simply not new features! That's a major product release! And try to remember the cost of the Zero - it's $5 (I assume it's staying the same price). Big changes are expensive. Small changes aside, this discussion got me think...
by geoffr
Mon Apr 18, 2016 11:14 am
Forum: General discussion
Topic: PiZero Roadmap
Replies: 159
Views: 63619

Re: PiZero Roadmap

mikerr, So the foundation (ok Raspi Trading) is still determined to go it alone with the zero ? My reading of it was different. The big boys did not want to carry the Zero because they could not make what they consider a decent return on it. Clearly they would like to have 10 percent of a million 3...
by geoffr
Mon Apr 18, 2016 8:41 am
Forum: General discussion
Topic: PiZero Roadmap
Replies: 159
Views: 63619

Re: PiZero Roadmap

the ability to buy more than one at a go will be the most request ed feature ;) That would be nice, but it would be nicer if there were some stock released at times which are better suited to those of us in other timezones. For those of us in the antipodes, what has usually happened is that stock g...
by geoffr
Thu Mar 10, 2016 4:40 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C and 5V - Definitive answer?
Replies: 25
Views: 5438

Re: I2C and 5V - Definitive answer?

To clarify a couple of points: You don't need external pull-ups on the 3.3v I2C bus - the Pi already has pull-ups on the I2C It is probably worth looking at using logic level converters to get your I2C to 5V, especially if the I2C devices you want to use are designed to run on 5V. The only case wher...
by geoffr
Thu Mar 10, 2016 1:53 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RUN header - circuitry
Replies: 6
Views: 1439

Re: RUN header - circuitry

Perhaps putting a capacitor in series between the INT and RUN pins would work ... Since there's a 100n cap from RUN to GND, something like 3 times that size might be suitable - will pull RUN low enough, then a few microseconds later let it rise? A capacitor did the trick: By putting a in a resistor...
by geoffr
Mon Mar 07, 2016 10:58 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RUN header - circuitry
Replies: 6
Views: 1439

Re: RUN header - circuitry

It always helps to read the manual - carefully. After sitting with a multimeter and watching what is going on on the INT pin of the DS3231 and then rereading the datasheet of the DS3231 *carefully* I have discovered that when the DS3231 generates an alarm it pulls INT low until the alarm is reset. N...
by geoffr
Sun Mar 06, 2016 11:34 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RUN header - circuitry
Replies: 6
Views: 1439

RUN header - circuitry

I am trying to find out more information about how the RUN pin of the BCM is connected, and what circuitry is in place outside the BCM to connect up to the RUN jumper (i.e. for reset functionality). What I am trying to do is to connect the RUN pin to the INT pin of a DS3231 RTC. The intention of thi...
by geoffr
Tue Feb 02, 2016 11:46 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using DS3231 RTC alarm reset/wake from halt
Replies: 2
Views: 1696

Using DS3231 RTC alarm reset/wake from halt

I am busy looking into how I can use the alarm from a DS3231 to wake/boot a Raspberry Pi, either using Wake from Halt, or the P6 header - using the alarm functionality from the DS3231. My intention is to use the INT (active low) ping from the DS3231 to drive either RUN (P6 header) or pin 5 on the GP...
by geoffr
Sat Dec 01, 2012 3:35 am
Forum: General discussion
Topic: EDUP WiFi adapter from Dealextreme
Replies: 16
Views: 28689

Re: EDUP WiFi adapter from Dealextreme

Just an additional comment about the adapter so far. I have found it mostly stable, with only one problem, which is not really related to the adapter: The wireless AP that I have it connecting to does a scheduled reboot at 2am every morning, and when the Pi sees the WiFi network go down, it shuts do...
by geoffr
Wed Nov 14, 2012 10:13 am
Forum: General discussion
Topic: EDUP WiFi adapter from Dealextreme
Replies: 16
Views: 28689

EDUP WiFi adapter from Dealextreme

Hopefully a piece of useful information: I ordered an EDUP WiFi USB dongle from Dealextreme, URL to the adapter in question is: http://dx.com/p/ultra-mini-nano-usb-2-0-802-11n-150mbps-wifi-wlan-wireless-network-adapter-48166 The adapter worked on the latest Wheezy image straight out of the box - it ...
by geoffr
Fri Oct 12, 2012 2:28 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Bi-directional level shifter for I²C-bus
Replies: 7
Views: 2979

Re: Bi-directional level shifter for I²C-bus

rurwin wrote:This link explains the choice:
Effects of Varying I2C Pull-Up Resistors
Based on the above link, I settled on 4.7k Ohm for the pull-ups on the 5V side. This is serving me well with 2 MCP23017s at the moment.
by geoffr
Mon Sep 17, 2012 10:58 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Injecting 12v on to the GPIO 5 volt pin to power RPi - don't
Replies: 16
Views: 3170

Re: Injecting 5v on to the GPIO 5 volt pin to power RPi - do

That voltage drop is across the polyfuse, which you bypass when powering the Raspi through the GPIO connector. That again means that you should set up your own protection when doing so, whether polyfuse, regular fuse or other. . Thanks - makes sense. Given that I probably need to provide my own 5V ...
by geoffr
Mon Sep 17, 2012 10:39 pm
Forum: Automation, sensing and robotics
Topic: driving a relay
Replies: 25
Views: 20858

Re: driving a relay

I've been on my own journey over the past couple of weeks of working out how best to drive relays from a Pi. I also started out looking at relay boards, such as the one you found on eBay. The first challenge is that most commercially available relay boards expect 5V logic, while the GPIOs on the Pi ...
by geoffr
Mon Sep 17, 2012 11:57 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Injecting 12v on to the GPIO 5 volt pin to power RPi - don't
Replies: 16
Views: 3170

Re: Injecting 5v on to the GPIO 5 volt pin to power RPi - do

On the topic of powering the Pi via the 5V pin on P1: I have noticed that I am getting only 4.75V on the 5V line (pin 2) of P1 when I feed power the "normal" way via the micro-USB. By comparison, I am seeing 5.05V when feeding power directly to the 5V line on P1, using the same USB power supply. Can...
by geoffr
Mon Sep 17, 2012 10:32 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Anyone use a MCP7940 RTC?
Replies: 12
Views: 4755

Anyone use a MCP7940 RTC?

I was just wondering if anyone has successfully used a MCP7940 RTC with their Pi?

Ciao,
Geoff.

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