I am new to this. This 2012 Version Arduino UNO R3 board is amazing. (Atmega 16U2 chip)
I am running on Windows 7 and I have a project that I am working on. I have 4 hc-sr04 sensors that are pointed in all 4 directions. I have 0.56" 7 segment 4 digit common anode red LED digital displays for each measurement readout in inches. I need to get repeated constant measurements for all 4 directions as quickly as possible. Is there a sample diagram and some sample code that I could find for this? Also, will NEWPING 1.5 download help me with this?
Any Help with this project would be amazing.
AFAIK there is no ready made code for you,
NewPing might help, but first try to get one sensor to work correctly. Do you already tried that?
I have not because I am waiting for my LED displays to get here.
Do you know where to find a sample project that I can learn from.
I still don't know the code that great.
If you are new to Arduino, the best thing to do is going through the examples that come with the IDE.
There will be lots of code that you will recognize as useful.
1 Question....
Does this sound possible with 4 sensors and 4 LED readouts?
If so, I will build it and share.
I just don't want to waste my time with it if any of you "professionals" know. lol
I will move on to other projects.
Any answers will be amazing. 
The sensors will interfere with each other, so measurements have to be sequential. How rapidly you can do that depends on the distance to the measurement target, because sound travels rather slowly.
Given all the examples on the web, it should be straightforward to get one sensor and one display working, then you can decide whether four would be possible or even useful.
But get an LED to blink first, especially with the "Blink Without Delay" example, as you will need to understand it completely before doing anything else.
thefourguy4444:
I have 0.56" 7 segment 4 digit common anode red LED digital displays for each measurement readout in inches.
It's harder than you think to get those displays working, especially if you have so many of them.
Nonsense, just takes 4 PNP transistors and a little multiplexing with blink without delay style coding.
Drive the cathodes from 7 outputs, or a shift register like TPIC6C595.
Enable 1 anode at a time for a few mS.
Turn off the anode.
Repeat for the next digit.
Got lots of digits? Use mic2981 instead of discrete transistors. Can use them to buffer the output of a low drive shift register like 74HC595, between the cathode and anode drives can get away with just a few pins: SCK, MOSI, cathodeLatch (SS), anodeLatch. Use a PWM pin to the cathode shift register OE/ for brightness control too if you want.
Thanks CrossRoads. (very impressive!)
I would love to succeed with this project.
Unfortunately I am such a beginner with this.
How about writing the code for me. lol. lol. lol.
I think I need to learn a lot more so I can make this happen.
Can you (or anyone else) suggest a few sample projects that will progressively move me towards this "4 measurement project"?
The code has been written and posted here before, just need to find it.
Great I will try to find it.If you remember or find out where it is could you drop me a message so I can get it. I would love to have it to use for this.
CrossRoads:
Nonsense, just takes 4 PNP transistors and a little multiplexing with blink without delay style coding.
Drive the cathodes from 7 outputs, or a shift register like TPIC6C595.
Enable 1 anode at a time for a few mS.
Turn off the anode.
Repeat for the next digit.
Got lots of digits? Use mic2981 instead of discrete transistors. Can use them to buffer the output of a low drive shift register like 74HC595, between the cathode and anode drives can get away with just a few pins: SCK, MOSI, cathodeLatch (SS), anodeLatch. Use a PWM pin to the cathode shift register OE/ for brightness control too if you want.
Bottom line, you need extra hardware to drive the displays.
If you're going to use extra hardware, maybe best just to cough up the dough for something like one of these: Adafruit 0.56 4-Digit 7-Segment Display with I2C Backpack - Red [STEMMA QT / qwiic] : ID 878 : Adafruit Industries, Unique & fun DIY electronics and kits
Why use shift register which need to multiplexing in software, use MAX7219 multiplexing in hardware, you can free up MPU for other processing. It supports multiple cascaded MAX7219 and using only 3 of the digital output pins.
http://playground.arduino.cc/Main/LEDMatrix
MAX7219 8 Bit Red LED Module 7 Segment
