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61  Using Arduino / Project Guidance / Re: Sanity check for burglar alarm project on: June 28, 2014, 05:36:12 am
With I2C you don't have to daisy chain them. One master and the rest slaves. In fact 1 or more masters and slaves. A board can be a master and a slave. Very flexible and easy to set up. I'm using this set up for a three board weather station. Also a alarm system that uses a land line phone.
 

Yes but I2C is generally for inter-board communication or between ICs not long distance communications over cables. You could get some line buffers in there but that would negate the design of the system the OP is proposing.

Cheers Pete.
62  Using Arduino / Project Guidance / Re: Sanity check for burglar alarm project on: June 28, 2014, 05:27:18 am
@Pete,
So we actually do agree on something.  smiley-grin

Robert

@Rob

I think you may find that we agree on quite a lot eventually smiley
63  Using Arduino / Project Guidance / Re: Sanity check for burglar alarm project on: June 28, 2014, 05:15:29 am
The serial link on the Arduinos is at TTL voltage levels. This is not good for long distance runs. You really should be considering a balanced line  protocol like 485. This will give you better noise rejection as it can travel through a cat 5 twisted pair and cancel out noise from the line.

take a look at this http://en.wikipedia.org/wiki/RS-485

and then this https://www.sparkfun.com/products/10124

Cheers Pete.
64  Community / Gigs and Collaborations / Re: Arduino developer needed for POC project. on: June 28, 2014, 02:01:49 am
Hello Corey,

I have sent you an email introducing myself.

Cheers Pete.
65  Using Arduino / Project Guidance / Re: Speed and recognition on: June 27, 2014, 04:28:24 pm
If you are feeling adventurous you can also adjust the size of the serial receive buffer in the support classes. Something i have done a few times when i had large bursts of data with time to read and clear the buffer between bursts.

Cheers Pete.
66  Using Arduino / Project Guidance / Re: Make a USBTiny with Arduino? on: June 27, 2014, 04:18:56 pm
OK so that is easy smiley

tha ISP header you see will be the same as the ones on the Arduino boards. It has become a standard

type "arduino isp header" into Google and look at the images .. lots of wiring examples there for you.

this is what you are looking for

http://letsmakerobots.com/content/make-arduino-isp-programmer


Hope this helps
67  Using Arduino / Project Guidance / Re: Problem programming ATtiny85 on: June 27, 2014, 03:52:46 pm
(PS-I never say "Cheers " to anyone who is at their wit's end)

I say "Cheers" to Every one no matter what end they are at smiley

Cheers Pete.
68  Using Arduino / Project Guidance / Re: Problem programming ATtiny85 on: June 27, 2014, 03:42:49 pm
where are you getting the attiny definition files from for the IDE

is the ATtiny listed as a board in the IDE ?

I Presume you have followed this link through ?

http://www.instructables.com/id/Using-the-Arduino-Uno-to-program-ATTINY84-20PU/


Cheers Pete.
69  Using Arduino / Project Guidance / Re: Make a USBTiny with Arduino? on: June 27, 2014, 03:33:17 pm
Hi WIll,

sure you can, there are a lot of good references to do this and the programmer is listed as "Arduino as ISP" under the "tools-> programmer" in the Arduino IDE.

here is the link http://arduino.cc/en/Tutorial/ArduinoISP

Cheers Pete.
70  Using Arduino / Project Guidance / Re: simple break beam circuit using https://www.sparkfun.com/products/241 on: June 27, 2014, 01:40:36 pm
Amen smiley
71  Using Arduino / Project Guidance / Re: Speed and recognition on: June 27, 2014, 12:49:36 pm
I am not sure i fully understand this question.

What is it you are trying to communicate between the device using xbees

how are you measuring the speed to get your 5-10 MPH window

what is the sweet spot that occurs in 1.5 seconds ?

Analogue/digital it is all the same in programming world. since the ADC takes your analogue signal and turns it into a digital representation anyway.

Can you try and re-explain what it is you are trying to do

Cheers Pete.
72  Using Arduino / Project Guidance / Re: simple break beam circuit using https://www.sparkfun.com/products/241 on: June 27, 2014, 12:43:25 pm
I have to say that some 45 ish years ago I was given my very first electronic kit. No ICs all discrete components. I build my very first radio set at the age of 9. I achieved all this without the need to be able to read schematics or understand the finer points of electronics. I did have a resister colour chart to help me pick the correct value resistors and some drawings to help me identify the legs of the transistors. I would like to think that this exercise has not "crippled" my progress but rather it whetted my interest in electronics in a way I could understand that has lead me to where I am now. At the time of building my radio I had Zero electronic theory. I am still learning 45 years later.

Take a look at fritzing .... breadboard layout .. I rest my case.

But then I may just be the odd one out.

Cheers Pete.



I realize you are new to electronics but I feel compelled to tell you that you are crippling yourself by putting your project as a higher priority than learning how to read and draw schematics. In my opinion, doing electronics projects without knowing how to read and draw schematics is counter-productive and just results in more problems , either in trying to communicate with us as you are now or in circuits not working.

Hacking is certainly a fun and exciting way to learn, that keeps you engaged making and thus motivating. You can learn as you need as you go. I mostly learn this way myself.

The Ethos of Arduino is to bring electronic building to the masses by "plugging" in shields and sensors with little knowledge on how they work internally.

For my sins I also play base guitar, I have never read a music theory book but I can tell a bum note when  I hear one smiley and I leaned to play a stomping walking blues riff by trial end error. Iteration through mistakes is a fun way to learn. I will never be a session musician but i am still having "fun"

Cheers Pete.
73  Using Arduino / Project Guidance / Re: Completely turn on and turn off arduino on specific date time on: June 27, 2014, 12:25:02 pm
Or if you are wanting to turn the Arduino back on after a fixed amount of time the use a 555 timer as a pulse stretcher triggered from the Arduino to cut the power to the Arduino and WIFI shield until nnn time has elapsed then turn it back on again.

See lots of ways to do it smiley

Cheers Pete.
74  Using Arduino / Project Guidance / Re: Controlling a dc model train layout via arduino on: June 27, 2014, 12:19:12 pm
If you are using a PWM signal then any Radio Control Electronic Speed Controller will  (ESC) do the job for you.

They are used in RC cars and quad copters to control the speed and direction of motors based on a radio transmitted PWM signal

You can if you want to use an Arduino, but why ? when it has already been invented.

something like this perhaps http://www.ebay.co.uk/itm/261414605285

Cheers Pete.
75  Using Arduino / Project Guidance / Re: simple break beam circuit using https://www.sparkfun.com/products/241 on: June 27, 2014, 11:29:45 am
I have to say that some 45 ish years ago I was given my very first electronic kit. No ICs all discrete components. I build my very first radio set at the age of 9. I achieved all this without the need to be able to read schematics or understand the finer points of electronics. I did have a resister colour chart to help me pick the correct value resistors and some drawings to help me identify the legs of the transistors. I would like to think that this exercise has not "crippled" my progress but rather it whetted my interest in electronics in a way I could understand that has lead me to where I am now. At the time of building my radio I had Zero electronic theory. I am still learning 45 years later.

Take a look at fritzing .... breadboard layout .. I rest my case.

But then I may just be the odd one out.

Cheers Pete.



I realize you are new to electronics but I feel compelled to tell you that you are crippling yourself by putting your project as a higher priority than learning how to read and draw schematics. In my opinion, doing electronics projects without knowing how to read and draw schematics is counter-productive and just results in more problems , either in trying to communicate with us as you are now or in circuits not working.
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