Maker Pro
Maker Pro

I would like to build tach for a small diesel. magnet, sensor, counter, LED

Slimbo

Oct 1, 2014
2
Joined
Oct 1, 2014
Messages
2
I would like to build a tach for a small diesell. Simple
magnet, pick up, counter LED readout. Is there schematics for this project?
 

debe

Oct 15, 2011
278
Joined
Oct 15, 2011
Messages
278
I know its not digital , but I made this for my Yanmar diesel engine in my boat & it works fine. Reed switches weren't mutch good as sensors so went for a hall device & a small magnet on crank pulley. The gauge was a salvaged tacho of another instrument panel I had laying around, & im only using the meter part of it,
 

Attachments

  • Tacho 3.JPG
    Tacho 3.JPG
    103.7 KB · Views: 749
  • Tacho 4.JPG
    Tacho 4.JPG
    131.6 KB · Views: 530
  • Tacho 5.JPG
    Tacho 5.JPG
    155.4 KB · Views: 737

Colin Mitchell

Aug 31, 2014
1,416
Joined
Aug 31, 2014
Messages
1,416
Please explain your set-up. How are you getting the "30" reading and what is the "coil" in the foreground?
 

debe

Oct 15, 2011
278
Joined
Oct 15, 2011
Messages
278
The coil was being fed 50hz power for calibration purposes, this was triggering the hall sensor and gave a reading of 3000rpm for a single pulse per revolution.
 

Arouse1973

Adam
Dec 18, 2013
5,178
Joined
Dec 18, 2013
Messages
5,178
I know its not digital , but I made this for my Yanmar diesel engine in my boat & it works fine. Reed switches weren't mutch good as sensors so went for a hall device & a small magnet on crank pulley. The gauge was a salvaged tacho of another instrument panel I had laying around, & im only using the meter part of it,

That's a good one debe, with the addition of an LM3914 and a few other components it would be able to drive a bar graph display.
Adam
 

Gryd3

Jun 25, 2014
4,098
Joined
Jun 25, 2014
Messages
4,098
That's a good one debe, with the addition of an LM3914 and a few other components it would be able to drive a bar graph display.
Adam
I've got a few of those kicking around.
In a half finished project to drive a bar-graph along the perimeter of my speedometer with rectangular LEDs ;)
 

Slimbo

Oct 1, 2014
2
Joined
Oct 1, 2014
Messages
2
Thanks, it works great. And the bar display is better for reading at a glance, great idea. When it's installed and I'm confident of it, I'll post. It's a combination of all the above. Thanks, Slim
 
Top