Arduino based Tachometer

[mgbyrne3]

Re: Arduino based Tachometer - Incomplete Script?

Your script file(TachSimple2.ino) appears to end after the switch debounce code (at line 97) - no interrupt management, call to rpm_fun, or LCD output. Is there a page or two missing from loop()?

 

[Gerritt]

Re: Arduino based Tachometer - Incomplete Script?

Your script file(TachSimple2.ino) appears to end after the switch debounce code (at line 97) - no interrupt management, call to rpm_fun, or LCD output. Is there a page or two missing from loop()?

The rpm_fun function contains the calls to lcd. At line 54 is the code to connect rpm_fun to the appropriate signal/interrrupt.

Code looks complete to me.

Gerrit

 

[arlo]

Re: Arduino based Tachometer - Incomplete Script?

Your script file(TachSimple2.ino) appears to end after the switch debounce code (at line 97) - no interrupt management, call to rpm_fun, or LCD output. Is there a page or two missing from loop()?

Gerrit has pointed out that rpm_fun[ction] performs the LCD output.

The call to this function is initialized by attachInterrupt(0, rpm_fun, FALLING); is the Setup() function.

It might be an improvement to move the LCD functions out of the rpm_fun interrupt handling routine but I've been using the sketch as is since I posted it and haven't seen a need to do this.


In using this tach for six months or so, I have found that the relationship between the magnet and the Hall Effect Sensor is more sensitive than I'd like. I had hoped that I could put a magnet on the chuck or spindle or wherever and then position the sensor while holding it in my hand. This method gives inconsistent results. Or maybe, consistently bad results. I now put the Hall Effect sensor in the vise and then carefully position it near the magnet. I have tried a couple of different style magnets but haven't gotten around this positional sensitivity. Once the positioning is set, the tach gives consistent results and meets my needs.

 

[mgbyrne3]

Re: Arduino based Tachometer - Incomplete Script?

Gerrit and Arlo - thank you for the feedback. I was misunderstanding the code. I'll be interested to see if I experience the geometry sensitivity that Arlo reports.

 

[arlo]

Re: Arduino based Tachometer - Incomplete Script?

Gerrit and Arlo - thank you for the feedback. I was misunderstanding the code. I'll be interested to see if I experience the geometry sensitivity that Arlo reports.

If you don't have experience with the Arduino IDE [Integrated Development Environment], the programs can seem a little odd at first. The use of Loop() and Setup() and the lack of Main() are not what C programmers expect to see.

I'd appreciate your comments and, especially, criticisms. I'm sure the tach can be improved.

If you have software problems I'd be glad to help.

 

[stupoty]

We shoudl have an electronics or embebded section to post usful stuff like this in nice case.

Stuart