Jonathan Dean
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  • Charlottesville, VA
  • United States
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Two LCDs in Parallel?

Started this discussion. Last reply by Jonathan Dean May 24, 2013. 3 Replies

If I hook two LCDs to an Arduino to one set of pins (so each Arduino digital pin has two wires going to two LCDs), would they work? I want to LCDs to display the same thing, but I also need six…Continue

Tags: parallel, arduino, lcd

 

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Jonathan Dean commented on Jonathan Dean's blog post GPS with GP-635
"It's been a while, but I seem to recall that I did have some success sending it commands. I never tried changing the baud rate because 9600 was fine. I do remember that it accepted strings, not binary values, so I don't know what the data…"
Dec 25, 2013
Guy Nicholas commented on Jonathan Dean's blog post GPS with GP-635
"Greetings, I am trying to change the comm rate on the GPS by sending the message listed in this doc: http://www.gui-soft.com/public_share/ublox-commands.pdf In my Arduino setup function I…"
Dec 20, 2013
Jonathan Dean replied to abhishek yadav's discussion how to record time between two events using arduion
"Just remember that millis() will overflow after about 50 days, so there's the potential for getting a reading where the starting value is much larger than the ending value, which will give you a huge but negative difference. Granted, it will…"
May 24, 2013
Jonathan Dean replied to Jonathan Dean's discussion Two LCDs in Parallel?
"Well, I finally got my 16x2 LCDs and a fresh new Nano 3.0. Both LCDs are wired up in parallel (same pot used for contrast, one resistor used for the backlight, although I'm going to change both to PWM in the actual project) and everything works…"
May 24, 2013
Jonathan Dean replied to Jonathan Dean's discussion Two LCDs in Parallel?
"Good idea on separate contrast and backlight controls. I was a little concerned that the timing would get hosed and one or both displays would have garbage on them, but now that I think about it, I don't think the Arduino "listens" to…"
May 9, 2013
PMH replied to Jonathan Dean's discussion Two LCDs in Parallel?
"Never tried it, but the Arduino should have plenty of drive to control two displays assuming you are talking low cost 2x16 displays. Use separate controls for contrast and backlight."
May 9, 2013
Jonathan Dean posted a discussion

Two LCDs in Parallel?

If I hook two LCDs to an Arduino to one set of pins (so each Arduino digital pin has two wires going to two LCDs), would they work? I want to LCDs to display the same thing, but I also need six digital inputs for buttons; being able to control two LCDs from one set of pins would make it easier for me (rather than setting up a resistor network for the buttons or a parallel to serial converter).Any ideas or suggestions?See More
May 8, 2013
Jonathan Dean replied to Michael G's discussion 7 Segment Display
"What a fantastic analysis!  Now I'm really anxious to see this thing running!"
Feb 15, 2013
Jonathan Dean replied to Michael G's discussion 7 Segment Display
"According to the datasheet for the LED driver/decade counters and the fact that you only have one data wire makes me think that the yellow wire should be connected to the CLOCK pin of one of the 4033B chips  "The counter is…"
Feb 4, 2013
Jonathan Dean replied to selvakumar's discussion weather sensors
"Adafruit Tutorial on DHT-11 and DHT-22 (has example code and wiring diagram), and Arduino Library for communicating with DHT-22."
Feb 4, 2013
Jonathan Dean replied to Michael G's discussion 7 Segment Display
"What does the bottom of the board look like?  Are the two power and ground wires common?  I haven't had a chance to look up the details on the ICs yet, but what I would do is trace back the leads from the ribbon to the LEDs to find…"
Feb 4, 2013
Jonathan Dean commented on John Malone's photo
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Arduino Seconds Timer

"That's pretty much my experience as well.  Programming is fun, but being able to interact with things outside of the computer is pretty awesome."
Jan 21, 2013
Jonathan Dean commented on John Malone's photo
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Arduino Seconds Timer

"Given that you were able to hook it all up and go so far as to make a functional UI with an LCD and a few buttons, I'd say you've gotten the hang of it!  Do you have a lot of programming experience?"
Jan 20, 2013
Jonathan Dean replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"I just tried my LCD to see what happens.  If the LCD and backlight are powered, the contrast pot doesn't do anything and the display is just blank (exactly what yours is doing).  I suppose that means that the Arduino isn't…"
Jan 19, 2013
Jonathan Dean commented on John Malone's photo
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Arduino Seconds Timer

"That's very cool, and using the faceplace makes it look nice and finished.  Nice job!"
Jan 19, 2013
Jonathan Dean replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"Well, it looks like all of the pins go to the right places.  Does the screen light up when you power it on?  Do you see one line blacked out and the other not?  What happens when you sweep the pot from one extreme to the other?…"
Jan 17, 2013

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GPS with GP-635

Posted on December 21, 2012 at 4:19am 2 Comments

So many GPS receivers nowadays keep the consumer far removed from the data that they use.  I wanted to get a GPS receiver module but most of them were more than I was willing to spend for a part that I didn't actually have a project for.  SparkFun started…

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