Making tachometers and speedometers

[tonyfoale]

I'd be very interested in getting a copy of this PDF and software.
Thank you

Bill Whitney
bwhit5@yahoo.com

The software is in a previous comment.

[jott]

I use a stepper motor "the white blob in the middle of the last photo" that is designed for the job and is used by several OEMs. They are readily available and they are surprisingly low cost. When I bought mine they came in a pack of three. I'll put together a PDF with full details and let you know. Fortunately it was only last week when I assembled the current one so it is reasonably fresh in my mind. I originally designed and built some about 10 years ago. The needles come with the motors and are an orange colour as in the first photo. This is from paint on the back side of the needle which can easily be scraped off and repainted with another colour so if you prefer black or white depending on your background colour it is easy to change. I just found a PDF file with data on the motor, with luck I have managed to attach it to this post. The motors have a movement range of 315 degrees but it is not necessary to use it all if it suits the look that you want with a smaller range on the dial. It is just a question of changing a number in my software.

Attachment 45454

I'm definitely interested in making either the tach or speedometer. Waiting for more

[vasquito]

Just a quick one - your Nano schematic shows +5V power coming out to sensors etc from pin 28 - which is actually a Reset and 5V out is from the adjacent pin 27 (as actually indicated on your diagram - but not 'connected').

[tonyfoale]

Just a quick one - your Nano schematic shows +5V power coming out to sensors etc from pin 28 - which is actually a Reset and 5V out is from the adjacent pin 27 (as actually indicated on your diagram - but not 'connected').

You spotted my deliberate mistake. I'll fix it and repost. Thanks for the heads up.

[vasquito]

Here's a quick one:

[nhengineer]

Impressive. Does it read electrical pulses from the ignition of does it read some kind of mechanical or magnetic input? I'm asking because I have a 1967 John Deer backhoe with no tach and, since it's a diesel, no electrical pulses to read. This maybe would fit the bill.

[tonyfoale]

Impressive. Does it read electrical pulses from the ignition of does it read some kind of mechanical or magnetic input? I'm asking because I have a 1967 John Deer backhoe with no tach and, since it's a diesel, no electrical pulses to read. This maybe would fit the bill.

This explained in previous posts, particularly #15. I will be making another post soon discussing more detail on input options.

[nhengineer]

The only post I see are yours and mine. Que pasa?

[Stokestack]

Count me in for those plans! The speedo in my '96 Mustang Cobra is flaky, so after I do a bunch of other work on it I'll tackle that.

[Ralphxyz]

Tony, did you post a link for the code? I have been trying to understand how to use a stepper for a indicator, with out any success.

Ralph