Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 03-03-2016, 17:08   #31
Registered User

Join Date: Apr 2015
Location: West Coast FLA
Boat: 1978 Pearson 424 Ketch
Posts: 455
Re: How to get Tachometer with Alternator off?

Originally Posted by mbartosch View Post
I have been trying to get information about the nature of the Tachometer signal itself (in my case the one coming out of a Balmar MC 614) but was unable to find any details on this.

I would like to "extract" the tach signal for processing in DIY electronics (something like tachometer software on a micro controller). Can anybody tell me the nature of this signal?

I *assume* it's a 12 V square wave. From what I read I'd expect the frequency to either equal the actual RPMs (i. e. 1 kHz => 1000 RPM) or being a multiple of that (probably 6 or 12 times this value, e. g. 12 kHz => 1000 RPM).

I'd appreciate any information or pointers to documentation.

(Apologies for the slightly offtopic post for this thread, but didn't think starting a new one was necessary.)
It goes by pulses off one of the inlet side of the rectifier bridge. the amount of pulses is determined by the number of coils in the alt. How ever many coils will determine how many pulses per revolution.

It sounds like you are going to reinvent the wheel. everything you need to make a solid state circuit work is already in the system, unless you are wanting to redesign the tachometer. then go look at a digital tack there is the circuitry you'll be making.

tinkrman69 is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
High Rated Alternator with Alternator to Battery Charger Rumbero Electrical: Batteries, Generators & Solar 113 18-07-2014 05:29
Leece Neville alternator and tachometer problem Rustic Charm Engines and Propulsion Systems 2 22-07-2012 19:54
My alternator is tested but I cant get it to work . Am I going blind ? flemmingsveen Electrical: Batteries, Generators & Solar 15 21-02-2012 10:33
How Do I Get the Alternator to Charge Both Batteries ? Aotearoa Electrical: Batteries, Generators & Solar 6 13-06-2011 09:48

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:24.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.