Diy shiftlight - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 04-27-2003, 01:59 PM
New Member
Join Date: Mar 2003
Location: U.K
Posts: 20
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post Diy shiftlight

Hi, does anyone know how to build a homemade adjustable shiftlight? I can't imagine that it would be that difficult if you have some electronics knowledge,I believe it's only a basic RPM sensing circuit/switch. I would appreciate any help,thanks.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 05-03-2003, 06:25 PM
PentastarTurbo's Avatar
New Member
Last photo:
Join Date: Apr 2003
Location: Stockton California
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

Id recommend something that plugs into a power source and reads voltage.. Ive see some shift lights that plug into the ciggerete lighter and you adjust it to your shift point I believe its called a Pivot shift light.. like 65 bucks here at our local ricer shop.. no hardwiring needed and very stealthy.. blinks a red LED light hats very focused and it attaches with double side tape. tiny
take care.

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-02-2004, 12:08 AM
Junorr's Avatar
New Member
Last photo:
Join Date: Sep 2004
Location: Canada
Age: 35
Posts: 13
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
This schematic is the base for most tach/shiftlights. I am currently working on a complete schematic and project and will post it as soon as it is complete and tested. I also am looking for more information on this subject so anyone with a complete schematic for an shift light plewase contact me.
Attached Thumbnails
Click image for larger version

Name:	analogtach.jpg
Views:	8337
Size:	32.1 KB
ID:	2499  
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-06-2004, 05:10 PM
docvette's Avatar
Registered User
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 65
Posts: 7,360
Wiki Edits: 12

Thanks: 0
Thanked 7 Times in 4 Posts

Doc here:

I've never done it, But it would seem logical to be a simple Comparator Linear I.C Circuit, off pin 8 of the Frequency to Voltage Controlled oscillator, using a Pot From the + and Minus offsets of the Comparator Chip to adjust the Shift points.

You Could use a Buffered Bright L.E.D. (S) for shift points.

Get an old tach, and a Comparator and mock up a circuit, try it out!

Look under Linear I.C. Spec sheets on any Semi conductor manufacturing website for specific Information.

Or you could go low tech, and try a series of 4 or 5 zenier diodes at the appropriate Voltage thresholds off pin 8 to light the L.E.D.s only they will light in steps and stay lit until the threshold drops below forward bias on each LED...


Last edited by docvette; 09-06-2004 at 05:16 PM.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

All times are GMT -6. The time now is 09:26 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.