2.8" TFT Touch Shield as a Speedometer
Moderators: adafruit_support_bill, adafruit

2.8" TFT Touch Shield as a Speedometer

by tlerdrden on Tue Feb 19, 2013 8:56 am

Hi,
I've been thinking to use this shield to use it as a speedometer for my bike, but I need, at least, 3 pins to use measure the speed...and I am not sure how to wire the Arduino using this shield.
Please, can you tell me if you have done something similar? For example, to connect sensors to the Arduino and use this shield to show the values....
Do you think that could be a good idea for my project?
Thanks in advance,
A.
tlerdrden
 
Posts: 48
Joined: Fri Nov 30, 2012 4:46 pm

Re: 2.8" TFT Touch Shield as a Speedometer

by adafruit_support_bill on Tue Feb 19, 2013 10:21 am

Available pins are digital pins 2,3 and analog 4&5.
User avatar
adafruit_support_bill
 
Posts: 30879
Joined: Sat Feb 07, 2009 10:11 am

Re: 2.8" TFT Touch Shield as a Speedometer

by tlerdrden on Fri Feb 22, 2013 2:40 pm

Ok, thanks for the prompt response.
But i've seen in the tutorial page of the tft display, that, I have to use one of this shields:
http://www.adafruit.com/products/51http ... rewshield/
Which one best fits for my application? I want to use it for my speedometer, and I need, at least, the VCC, GND and digital 2 pin.
Thanks again,
tlerdrden
 
Posts: 48
Joined: Fri Nov 30, 2012 4:46 pm

Re: 2.8" TFT Touch Shield as a Speedometer

by adafruit_support_bill on Fri Feb 22, 2013 5:32 pm

The proto shield plus some stacking headers would be an easy way to access those pins. But for a bike computer I expect you would prefer a more compact package. How good is your soldering? With care you should be able to tap into the three pins you need without adding to the bulk of the package.
User avatar
adafruit_support_bill
 
Posts: 30879
Joined: Sat Feb 07, 2009 10:11 am

Re: 2.8" TFT Touch Shield as a Speedometer

by tlerdrden on Sat Feb 23, 2013 7:51 am

Yes, you are right, I prefer the bike computer as compact as possible, so...Do you suggest to solder those three pins without any shield?
tlerdrden
 
Posts: 48
Joined: Fri Nov 30, 2012 4:46 pm

Re: 2.8" TFT Touch Shield as a Speedometer

by adafruit_support_rick on Sat Feb 23, 2013 11:04 am

You could try to tack wires onto the pin solders on the bottom of the Arduino. Make sure you have some sort of strain-relief on the wires - maybe hot glue them to the board.
Or, you could wrap and solder the wires onto the bases of shield pins, so that the shield will still insert into the arduino. That would work better if the wires are fine gauge - you want to interfere with the insertion as little as possible.

adafruit_support_rick
 
Posts: 12910
Joined: Tue Mar 15, 2011 11:42 am
Location: Buffalo, NY

Re: 2.8" TFT Touch Shield as a Speedometer

by adafruit_support_bill on Sat Feb 23, 2013 9:09 pm

Another approach is to wrap the wires around the shield pins and solder as close to the bottom of the shield as possible before plugging the shield into the Arduino. In any case, you will want to use some form of strain relief as Driver Block suggested.
User avatar
adafruit_support_bill
 
Posts: 30879
Joined: Sat Feb 07, 2009 10:11 am

Re: 2.8" TFT Touch Shield as a Speedometer

by tlerdrden on Sun Feb 24, 2013 10:08 am

Good! I will try with some of your answers and share the experience.
Thanks!
tlerdrden
 
Posts: 48
Joined: Fri Nov 30, 2012 4:46 pm

Re: 2.8" TFT Touch Shield as a Speedometer

by tlerdrden on Wed Feb 27, 2013 10:04 am

Just an additional question: What is the best enclosure to put an Arduino Uno+TFT Shield? I know about the enclosure id:271 ,but it is unproper to use the touchscreen...
Do you know about some enclosure?
Thanks.
A.
tlerdrden
 
Posts: 48
Joined: Fri Nov 30, 2012 4:46 pm

Re: 2.8" TFT Touch Shield as a Speedometer

by adafruit_support_bill on Wed Feb 27, 2013 10:18 am

We do not currently have an enclosure that fits the touch shield. Most people make custom enclosures or modify off-the-shelf enclosures to fit.
User avatar
adafruit_support_bill
 
Posts: 30879
Joined: Sat Feb 07, 2009 10:11 am