Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-20-2008, 02:09 PM   #1 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,171

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,471
Thanked 2,537 Times in 1,529 Posts
Looking for a low battery voltage switch

I'm looking for a switch that monitors battery voltage. At a set voltage the switch would trigger a LED or relay. Anyone have any ideas on where I could get something like that? I know autospeed has one but I'm really not looking to order something from Australia.

__________________
Current project: A better alternator delete
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-20-2008, 02:56 PM   #2 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 85 Times in 56 Posts
I can confirm that getting something from Autospeed can take a while. My order was shipped via airmail 11 days ago. Must have been shipped in a Beaver.
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 11-20-2008, 07:19 PM   #3 (permalink)
Master EcoModder
 
Join Date: Sep 2008
Location: Texas
Posts: 632
Thanks: 0
Thanked 25 Times in 23 Posts
A simple comparator circuit is all you need.
__________________
If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
  Reply With Quote
Old 11-20-2008, 09:30 PM   #4 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 529 Times in 356 Posts
Daox -

Here's one :

Universal Voltage Switch

Quote:
Ref: High Performance Electronic Projects for Cars - Silicon Chip Publications.
This is a universal module which can be adapted to suit a range of different applications. It will trip a relay when a preset voltage is reached. It can be configured to trip with a rising or falling voltage, so it is suitable for a wide variety of voltage outputting devices eg., throttle position sensor, air flow sensor, EGO sensor. It also features adjustable hysteresis (the difference between trigger on/off voltage), making it extremely versatile. You could use it to trigger an extra fuel pump under high boost, anti-lag wastegate shutoff, and much more. Kit supplied with PCB, and all electronic components.
Jaycar electronics is "joined at the hip" to Autospeed.

CarloSW2
Attached Thumbnails
Click image for larger version

Name:	voltage_switch.jpg
Views:	251
Size:	13.9 KB
ID:	2177  
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 11-21-2008, 08:01 AM   #5 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,171

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,471
Thanked 2,537 Times in 1,529 Posts
Yeah, I know autospeed carries two versions of the voltage switch. I like the one I posted more because its all solid state construction and thus I don't have to worry about the relay ever dying. Also, I just would like to find a place in the US that has this sort of thing. Someone has to have something like it on this side of the pond.

NiHaoMike, I know I need a voltage comparator and that it would be a relatively simple circuit. However, I don't know enough about electronics to build one myself. The problem being that the reference voltage will vary. Unfortunately, I don't even know enough to look at a circuit and know if this problem has been solved. Lastly, I'm willing to pay a bit (not a ton) just to have it premade so as to save me the time and hassle. If you have any suggestions, or a diagram that would be great.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 11-21-2008, 10:02 AM   #6 (permalink)
Master EcoModder
 
Join Date: Sep 2008
Location: Texas
Posts: 632
Thanks: 0
Thanked 25 Times in 23 Posts
Use a zener diode as a reference.

__________________
If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Kill switch for 88-95 Honda Civic/CRX/DelSol AndrewJ DIY / How-to 40 06-18-2012 03:13 AM
VX Info...WARNING: lots of info! TomO Off-Topic Tech 1 01-05-2010 12:39 PM
Correct battery voltage ? groar Off-Topic Tech 2 09-23-2008 09:13 PM
HCH 1 battery running low MasterAlex Hypermiling / EcoDriver's Ed 4 08-04-2008 02:41 PM
How Low Can You(r Battery) Go? Fuzzy EcoModding Central 2 01-07-2008 10:15 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com