Problem with Orangutan-b 328 &ping sensor giving weak echo

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1

With my Oscilloscope i measure the pulse of my ping sensor and it was 2.41mV(here is the pulse out) and -2.41mV <-here the echo

What is the Low voltage/pulse input limit on the Orangutan-B 328?
the ping sensor is hooked in pin IO_C3
Is there away to increase the voltages in the code?
It is not storing the pulse in ( LastHighPulseMicroseconds).
my arduino(mini and uno) gives me much higher pulses. I used this as my comparison for the baby orangutan-B 328.
I was thinking it was something to do with Baby Orangutan-B 328, instead of the code.

class Ping{
	
	protected:
	long double inches,cm;
	
	
	
	public:
	
	 Ping(){ 
	 }
	
	
	~Ping(){
		
							
		
		}
		
		
	
		
	

void PingPulseOut(unsigned char pin){
	
	 
	 
			
				 
	
		 
	/*
	*	OrangutanDigital::setOutput(pin,LOW);
			
			
	*		delayMicroseconds(2);//2microseconds
	*		OrangutanDigital::setOutput(pin,HIGH);
			
	*		delayMicroseconds(5);//5Microseconds 
	*		OrangutanDigital::setOutput(pin,LOW);
			
	*	    delay(100);//100ms
			
	this part works		
	*/
			 }		
		
						
			
	unsigned char PingPulseIn1(unsigned char pin2){
			
			OrangutanPulseIn::start((unsigned char[]){pin2},1);
			
			
				#if pingMode2==1
				
				
		unsigned long LastHighPulseMicroseconds = //Here.

OrangutanPulseIn::toMicroseconds(OrangutanPulseIn::getLastHighPulse(0)); // !!!!
				
				#if PingMode1==1
				if(LastHighPulseMicroseconds > 10000){ // !!!!
					
					OrangutanDigital::setOutput(IO_D1,HIGH);
					
				}
				#endif			
				//unsigned long elapsed=-lastLowPulseMicroseconds+LastHighPulseMicroseconds;
				
				
				if (LastHighPulseMicroseconds>= 115) // !!!!
			
				{
 
			
				 inches=LastHighPulseMicroseconds/(37.);//previous code
				
				 inches=cm/2.54;
			return inches;
			
			
			
				
						
			#endif
			
			OrangutanDigital::setOutput(IO_D1,LOW);
			delay(1000);
			
	      return 1;
			}						
	
			}

thanks for you time.

2

Hello.

Are you using an actual Parallax Ping))) sensor or some other sonar sensor? If the sensor is only outputting a few millivolts, then you are likely either not using it correctly, not measuring it correctly, or it is damaged. The guaranteed-high threshold for the Baby Orangutan digital inputs is 3 V. Can you explain your setup in detail and possibly include a picture? Also, can you simplify your program to the shortest thing that should work but doesn’t, and can you clean it up so that commented-out lines are removed and the remaining lines are properly indented? It is very difficult to read your code as you posted it.

- Ben

3

Hello, Ben
sorry for the delayed reply

thank you for answering.

Parallax Ultrasonic ping sensor

I put 1x (the oscilloscope set 1x probe) probe to Sig and ground to ground(- rail).

I would like to talk about my Baby orangutan B 328. I believe my problem lies with output of the device to trigger a good response out of the ping sensor. But instead the trigger pulse give me 5V. The end results is that i have an echo pulse of 1.81V , instead of the 3.3v or 5v.

Compared to my Arduino mini . Arduino gave me an output of 32v and the Arduino mini is power by usb port. when i connect it the Ultrasonic ping sensor i get a response out of the Arduino mini. the Echo pulse Vp is small then the trigger pulse. But it worked.

Circuit babyOrangutan b 328.jpg850×1169 43.7 KB


Layout bread board.txt (704 Bytes)

4

I almost convinced that i damaged the input, when i started to use it the very first time. When i accidentally hooked in power supply to ad6 ad7. this made the Microprocessor got hot and maybe ruined some transistor inside. (didn’t smoke)
Whoops
should I buy a new Orangutan-B 328 because of this mistake?

5

Connecting power to the I/O lines on the Baby Orangutan can definitely break the microcontroller (it’s getting hot is also a bad sign). If you email us with your order information and refer to this thread, we might be able to get you a discount on a replacement.

- Ben

6

It’s fine. I that pololu won’t give a discount for a new baby Orangutan b 328 do to an accident. so I already order a new one.
I was wondering if I can solder pins to the board in a way that the white letters are facing up? the reason is to know actly what pin PC3…

thank you for your response Ben

7

If you solder the board in that orientation, the 6-pin programming header will not match the cable from your programmer, and I think it would be a pain for you to try to make a new cable that would work. We just added a printable pin assignment diagram that might make it easier for you to identify which pin is which:

pololu.com/file/0J576/Baby_O … B_pins.pdf

Maybe you can have a copy of that on your work bench or wall near your Baby Orangutan to use as a reference?

- Ben

8

I do understand why pololu put the pin layout on the bottom of the board. there no room for it on top.
Thanks for answering my question