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
"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…"
"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…"
"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…"
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
"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…"
"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…"
"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…"
"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?…"
"Make sure you keep us up to date on your progress! I think you have an uphill battle ahead of you, but it sounds like you have the tools and skills to come out successful. I'm anxious to know what you learn about the protocol the…"
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…