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Stuart Crawshaw

Member Since 01 Jul 2011
Offline Last Active Apr 25 2012 10:57 AM

Topics I've Started

Six Button Interface for LCD Menu System.

19 July 2011 - 02:51 PM

Hi all,

Here is the outline,

I want to have a menu system accessible by buttons on my project. The display will be a 20x4 LCD Display and there will be 6 buttons as follows:

  • UP
  • DOWN
  • LEFT
  • OK

Now the basic idea of how these would work is have an interrupt port setup for each button (but thats 6 ports!). So now the question,

How could i achieve this, but only use the minimal number of ports?

I though about using a PISO Shift Reg, but then remembered it would need a clock etc and someway for the ND to know that data is coming in (i think).

I then there is the Matrix style setup but i would only save 1 pin (2 cols and 3 rows = 5 lines).

Any suggestions, fancy IC's or fancy components that will let be achive this goal?

Thanks for your continued support.

New Soldering Iron

19 July 2011 - 12:27 PM

Hi All, Its me again :) OK, so i have finally given up on my very very cheap apparently "temperature controlled" soldering iron (its either too hot or too cold) So, as the title of this thread suggests, i am looking for a new one but on a budget. Im not looking to spend more than £100 (may be less) but want a decent solding iron with a digital display of some sort to show the current temperature... So for you standard hobbyist who will be soldering through-hole components on to vero-board such as transistors, resistors etc (none of the surface monut stuff) What would you guys suggest? What wattage is good? if 70W too low? Etc etc etc.... Thanks guys.

Soldering Techniques For Small Components

14 July 2011 - 04:33 PM

Hello Everybody, General question to go out ot everyone regarding Soldering Techniques.... When soldering small components, for example: the wires on to the pins of a DS1820 sensor, how do you go about this? Ill also open this question up to everyone to share any other soldering Techniques they use when soldering other things too! Thanks again guys, Cant wait to see how you get yours done! -------- Stuart.

Digital GPIO Pins Voltage

14 July 2011 - 03:55 PM

Hey all, Just reading the specs page again, and i noticed the Digital IO pins a rated at 3.3v but are 5v tolerant. Just a simple question, will using 5v Input or Output reduce the life expectancy of the device and is using 3.3v safer/recommended over 5v? Or does it simply not matter? Thanks in advance, Stuart.

Connect Debugger Without a Re-Compile/Re-Send

12 July 2011 - 04:27 PM

Hi all, I was just wondering if after my project is built and the netduino is in-situ, is it possible to then reconnected the computer to the USB port and view the debug messages from the code (Debug.Print("")) without having to hit the debug button in c# Express and rebooting the netduino? Hope this made sense... Thanks again for all of your help on this and other topics. Regards, Stuart.

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