Bidirectional Counter

[Arul Verman]

Hello 

 

Has anyone tested the bidirectional counter circuit available at Engineers Garage and found it working with the source code??

 

Thanks!

[AJISH ALFRED]

Hi,

Majority of the uploads in the site have working video, so there is no reason you should be doubtful about the working.

[Arul Verman]

Thanks for your reply! I was wondering if the 7 segment display used there is Common Anode or Common Cathode ??? Also the IR Transmitter and Receiver is the recevier a photo transistor or just an ordinary led receiver pair ??

[AJISH ALFRED]

Please post the circuit image or the link

[Arul Verman]

I’ve assembled this circuit successfully the Seven Segment display  shows 0000 too. But it does not increment or decrement value when i place an obstacle over the IR Transmitter and Receiver pair . Given that the display shows 0000 means that the program code executed successfully and other half of circuit is fine. 

 

Along the sensor input ive used a 20k preset tuned it into 10k  also similarly used a 20k tuned it into 4.7k . The receiver is a simple blue colored receiver pair for IR similar to the IR Led two legged .

 

I’m not sure where am i going wrong help me out.

wysiwyg_imageupload:13317:

[Ashutosh Bhatt]

first you have to check whether you are getting pulse output from IR receiver (photo diode)

you can easily do it by placing voltmeter (multimeter) across it. just check if it gives pulse.

 

next check whether  IR LED emits IR light

you can check this using digital camera – mobile camera

 

if it does not then there is problem in IR LED or photo diode. 

 

[AJISH ALFRED]

Hi Arul,

To help you better the forum members might have to go through every details of the project you are trying to do. It require to find out the exact project from the website, and you can help them by posting the link. When you upload a circuit diagram please make sure that it is legible to view.

[Author]

Posts