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1  Development / Other Hardware Development / Re: Industrial like I/O on: June 26, 2014, 02:32:14 am
I am looking forward to seeing the designs and PCB, I might have a use for a 4-20mA input shield with 3 analogue inputs. smiley
2  Development / Other Hardware Development / Re: Industrial like I/O on: June 26, 2014, 01:07:41 am
I like the idea of the 4-20mA input and output, this would be very useful.
As well as PT100 you might also consider K-Type thermocouples as they are widely used in industry.
3  Community / Local Groups / Re: Are there any Arduino People in South Wales UK on: March 26, 2014, 04:49:27 am
I am from Devon in the Southwest, PM me if you need to chat via e-mail.
4  Using Arduino / Displays / Re: Mega 2560 with ST7920 LCD and u8glib problem on: October 30, 2012, 05:01:55 pm
Thanks for explaining that.

The  only other thing to mention, is when this problem occurs, on first power up, it only seems to effect the top half of the screen displaying random pixels, the bottom half displays my correct information.

I will post a photo as soon as I can.

When I pull the 5 volt out and back again whilst sketch is running all is displayed correctly.

Jason
5  Using Arduino / Displays / Re: Mega 2560 with ST7920 LCD and u8glib problem on: October 30, 2012, 03:22:24 pm
Hi Oliver

Thanks for taking the time to reply, I will try the revised library and see what happens.
At the moment to get over the problem I have to remove the 5volt supply to the GLCD whilst my program is running, wait a second and then restore the 5volt supply , once the display is showing the correct information it will function Ok, it just appears to be a problem on first power up.

One question, could this probelm be caused by the fact I am not using the display reset (not present on the serial socket which is on a PCB on the back of the display)

U8GLIB_ST7920_128X64 u8g(0, 1, 2, U8G_PIN_NONE);

Many thanks
Jason
6  Using Arduino / Displays / Re: Mega 2560 with ST7920 LCD and u8glib problem on: October 29, 2012, 05:45:37 pm
I am also getting the same problem with my ST7920 graphic display operating in serial mode,
Ph4nt0m Did you manage to cure your display problem?
7  Community / Local Groups / Re: South West UK on: April 18, 2012, 03:38:49 pm
I'm near Exeter.


8  Topics / E-Textiles and Craft / Re: LilyPad connected to a MQ-7 Sensor? on: April 18, 2012, 01:20:35 pm
http://www.staceyk.org/airSensors/sensorsetup.php

Not used them but there is some information on above site which might be useful.

9  Using Arduino / Project Guidance / Re: Servo library and serial communication... can they coexist??? on: April 08, 2012, 06:29:38 am
Quote
The weird problem is that the servo refuses to move to the data flowing in until I open up the serial monitor on the pc.

This may be off topic but I had a similar problem, the serial monitor resets the arduino so everything works as it should, but nothing works when you first power up the arduino.
My problem was that some of my sensors needed time to powerup and settle before communicating to them, I had to put a small delay at the start of my sketch to allow for this, this delay allowed for everything to powerup and wait for instructions.

By using the serial monitor everything is already powered up and ready, it just gets a software reset when the serial monitor is opened which starts everything working as it should.

10  Using Arduino / Project Guidance / Re: school project ... need help ! on: April 08, 2012, 05:53:37 am
A very ambitious project for beginners,
It is best to break the project down into smaller parts, get each part working before moving on to the next.

I would have some sort of display and basic buttons so that the user can program each day and timetable times.
A RTC to keep perfect time
The daily timetable times will need to be written to eeprom in case the power is turned OFF
A manual overide just in case you need the lights ON regardless of time and the light level

Maybe include a PIR movement sensor in case the room is empty






11  Using Arduino / Sensors / Re: Temperature Display on: April 07, 2012, 02:25:53 pm
Looks like it was drawn using http://fritzing.org/

well worth a look at, it too is open source and there are loads of additional drawing libraries to download.
12  Using Arduino / Sensors / Re: temperature probe /what kind on: April 07, 2012, 11:27:56 am
If it is a PT100 temperature probe, its resistance at room temperature (25'C) should be around 110 Ohms,

at 50'C its resistance will be around 119 Ohms and at 100'C it will be around 138 Ohms
13  Using Arduino / Displays / Re: How to Connect the 1602 Display Shield on: April 06, 2012, 07:23:16 am

The information is in the link you provided


Becarefull with the Backlight  Digital 10 - I'd suggest you search this forum as there have been a fault  reported with some of these shields before connecting this function up!

look here for circuit diagram information http://www.micro4you.com/files/arduino/lcd-keypad-shield-schematic.pdf






Most problems are with connections being incorrect, double check with the above diagram, then make sure you have the correct pins configured in your library.
14  Using Arduino / Displays / Re: How to Connect the 1602 Display Shield on: April 06, 2012, 07:07:36 am

The information is in the link you provided


Becarefull with the Backlight  Digital 10 - I'd suggest you search this forum as there have been a fault  reported with some of these shields before connecting this function up!

look here for circuit diagram information http://www.micro4you.com/files/arduino/lcd-keypad-shield-schematic.pdf



15  Using Arduino / Sensors / Re: temperature probe /what kind on: April 06, 2012, 06:59:28 am
Look for the datasheet for - AD594 or AD595 which are K type thermocouple ampilier IC's.

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