[Wbo2] RE: More LED display help

[Tommy]

Using a Zeitronix unit with bosch sensor.  The unit sends out a WB
signal for connection with ECU which I was going to use for the sensor.

Planning on using this with a LM340 voltage regulator.  



-----Original Message-----
From: bcroe at juno.com [mailto:bcroe at juno.com] 
Sent: Wednesday, September 21, 2005 5:39 PM
To: crash813 at sbcglobal.net
Cc: wbo2 at diy-efi.org
Subject: More LED display help

What WB unit are you using?  The outputs vary.  

A data sheet is not a complete design.  You need a power 
supply, noise and power spike filters if the thing is to be 
practical.  Taking an existing design and scaling it down 
is a good solution.  

If you just want to see lean, you could use a NB sensor.  

Bruce Roe

21 Sep 2005  Tom Hill <crash813 at sbcglobal.net> writes:
> Thank you guys for all the advice so far.  I'm trying to decide if I 
> want to do the simple 1 LED at STOICH or a 10 led for the whole 
> range.  The 20 led is just too much.  I'm been researching alot on 
> the 3914 chip to display the 0 - 5v range and that would be fine, 
> but I'm wondering if its possible to just show the 0 - 3v range of 
> the 5v signal and segment that into 10 steps?  The 3914 datasheet is 
> almost confusing me more than helping.  I'd appreciate it if 
> somehere here with obviously better electrical skills than me can 
> tell me if its possible and how to adjust it to make it so.
>  
> Here is the schematic for the 0 - 5v signal off the datasheet.
>  
> http://www.crash813.com/other/LM3914.jpg
>  
> thanks Tommy

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