[Wbo2] Can't get up and running

[Tim Marsteiner]

Russ, 

In order for the circuit to work the way it is the
input must be equal to or above 12.7 volts. 

Why are you only getting 12.15 v? Is this in a vehicle
or are you trying to debug with a weak power supply?

If it is for a car you should have an input voltage
above 12.7.

BTW do not plug your sensor into a already powered up
circuit. The heater voltage ramps up when you first
power on the circuit for a reason. If you heat up the
sensor too fast you run the risk of cracking the
sensor element. The voltage should ramp up from ~5v to
10.5 v over a period of 45+ seconds.

Tim

--- Russ Hildebrand <russellh911 at comcast.net> wrote:

> OK, I added the 100k resistor to R9. That got me to
> 12.48 at J3 and 10.48 
> at J1 without the sensor attached. The LED pops
> right up and on. As soon as 
> I attach the L2H2, the LED goes out and doesn't come
> back. (I've gone about 
> 90 seconds with things powered)
> 
> With the sensor attached, J1 is down to 10.05v and
> J3 is down to 12.15v.
> 
> Any other ideas?
> 
> I sure appreciate the help, I would have no clue
> what to do.
> 
> Russ
> 
> -----Original Message-----
> From:	Tim Marsteiner [SMTP:tmarstei at yahoo.com]
> Sent:	Saturday, June 11, 2005 4:18 PM
> To:	russellh911 at comcast.net
> Subject:	RE: [Wbo2] Can't get up and running
> 
> My heater voltage was a little low as well, so I put
> a
> 68k in parallel with R9. It is now 10.51 v. You may
> want to start with 100k.
> 
> 
> --- Russ Hildebrand <russellh911 at comcast.net> wrote:
> 
> > LT1086, I have 12.62v at J3
> >
> 
> 
> 
> 		
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