Raspberry Pi Forums

davidcoton

It has bluetooth and wifi and has a usb port. That's pretty much all I need. Even if they do try and sell add on boards I won't be needing them so I won't buy them. I am ok waiting until May or longer. I waited a very long time to get my Particle Photon and there where delays but I think it was wel...

davidcoton

Some electronics. It doesn't need a Pi or even an Arduino.

davidcoton

I do not feel that the BCM2835 has had a die size changed, after around 10 years would it be worth it :?: :?: IDK [speculation] What was the manufacturing capability for the BCM2835? And the demand for the chip from Pi and other customers? Was a die shrink necessary to ensure volume of production f...

davidcoton

AFAIK, USB dongles are platform indepentant as far as the hardware is concerned. Only the drivers are different. Then it depends whether your OS (whatever flavour) contains the drivers by default, can download then when required, needs standard or custom installation, or doesn't have drivers.

davidcoton

I guess (hope?) the RPi will be, again, causing lots of headaches to the poor guys in charge of the distributor´s web sites this christmas.... :lol: On a side note....I read somewhere that the original plan was to produce a higher priced RPi but some guy at Google persuaded Eben the other way aroun...

davidcoton

DougieLawson wrote:Six raspberry pi A+ machines and a network.

Except you would also need six WiFi or USB to Ethernet dongles. If you go that way, try Pi B+.

davidcoton

I'm going to set up a dummy version with batteries and an LED. Once I have the software switching on and off the LED as planned, I'll get an electrician friend to wire in the boiler controller. Good call. One weakness I can see in my set up is that if the heat is turned on at original controller, t...

davidcoton

The Pi Zero is about getting the price down as much as it can possibly be reduced. THAT IS THE ENTIRE POINT. So there is nothing on that board that doesn't have to be there. If you add a bulkier connector to the design. EVERYONE has to pay for it when they don't need to. Ok, but if it's useless wha...

davidcoton

A boiler like that draws a lot of current. Make sure your relay is able to handle that. No. It's a gas boiler, very small electric current for control. As per the image, it's fused at 3A -- but probably draws well under 1A (For safety the relay should be rated 3A. EDIT: The one linked was rated 10A...

davidcoton

Mains wiring can be lethal -- for you, someone else, or your Pi. Don't do it unless you are a competent (if amateur) electrician and are familiar with your country's wiring regulations. I'm not sure that the relay you linked will work with a Pi (3V3 outputs). Get one that specifically mentions Pi. W...

davidcoton

Must be the start of a series containing plans for a Raspberry Pi - powered DeLorean time machine.
Which implies the simultaneous announcement of a Pi 2B+ with built-in RTC.

davidcoton

DougieLawson wrote:
Woll wrote:What about an expansion board for fitting multi Hats.
Stacking HATs is unsupported, so any strange hardware offered to do it is breaking the HAT Law. Your HAT may not fit.

Most of us are quite used to wearing multiple hats. Do Pis, like pets, grow to be like their owners?

davidcoton

How many Pis have suffered premature death because of wiring erros, lightening strikes, faulty PSUs, etc? You could count the number reported here, it will reduce your total to check by maybe 20-30.

davidcoton

Surely the hooks in cron or rc files are adequate? You might need to be clever in your script if you want it to run one time only. You don't get it. The point is that you'd still need the maintainers to put something in there that isn't already there (and which there seem to be no plans to ever put...

davidcoton

More likely a limitation of you 12V supply. Use LEDs or a multimeter to check the GPIOs are working.

davidcoton

Surely the hooks in cron or rc files are adequate? You might need to be clever in your script if you want it to run one time only.

davidcoton

There is a way... but it's nearly a year since I set up my embedded system. The link above looks very familiar, assuming you're on Raspian, and noting that the updates (including Jessie*) in the last year may break it. I do remember it took a lot of trial and error, and of course I got diverted to o...

davidcoton

Development of Python and Tkinter can all be done on the Pi. The only time it's tricky is developing for a small screen system, since connecting a second (large) screen for editing code at the same time can be awkward.

If you're new to Python, find an online tutorial. I used this.

davidcoton

The connections you list are not consistent with the data sheet. AIUI: Gauge Vss should be connected to Pi 0V (pin 6). I can't see a gauge Vout, neither can I see any other pin (except Vss) that should connect to Pi 0V. It would be unusual to connect any output to 0V. There should be no connection t...

davidcoton

Reversed AC polarity should have no effect on the DC output, unless something very weird is happening within the power supply. Yes. I would treat that PSU with great suspicion unless you can establish why reversed mains polarity causes a problem -- there could be dangerous conditions. [speculation]...

davidcoton

Sneaky. Thanks for posting the full scripts -- only problem is, when I need something like that I'll have forgotten where it is

davidcoton

a couple of 500mbps home plugs can get you an Ethernet connection your sky box ;) I'm guessing that is not the problem -- what is needed is to capture the RF output from the Sky box top put the signal on to Ethernet -- presumably adjacent to the Sky box. Sorry I don't know what USB tuners will capt...

davidcoton

i think it would be really awesome if there were some officially supported game engines for the raspberry pi. Remember the RPF is a charity with educational aims. While learning to develop games may be educational, I suspect the need for that is adequately met by pygame. (I haven't tried it, so I m...

davidcoton

Answers inserted in italics Here is what I'm not happy about : configuration is time consuming Is that any different on any other comparable system? display resolution ! I don't know how it can even be a problem (I mean it, I don't understand) I don't know either, what is the problem? What do you wa...

davidcoton

How could such a hardware-delay solution look like? It might be as simple as a capacitor on the base of the PSU shutdown transistor (after the resistor from the GPIO). The RC would result in a slowly rising voltage, the transistor will not trigger untill it reaches ~0.6V. (various assumptions made ...

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