02 sensor LED readout schematic

[AUDIDUDI@delphi.com]

The following has bounced around several lists but never, to my knowledge, 
been posted here.  I have not yet built one myself (too busy!) and I can't
comment as to whether it works as claimed or not...
 
[included file]

Originated-By: "Andrew Dennison" <ADEN@mechman.mm.swin.edu.au>

I just found a simple circuit for an A/F meter.  It uses 1 IC, 10 
LEDS and 2 resistors.  Here it is:
                           ___+12 Volts
 Sensor ----|5      3|------|
            |      10|--|<--| LED1
     5K adj |      11|--|<--|
 GND--/\/\--|6     12|--|<--|
            |      13|--|<--|
      680   |      14|--|<--|
 GND--/\/\--|7     15|--|<--|
            |      16|--|<--|
         |--|8     17|--|<--|
         |--|4     18|--|<--|
         |--|2      1|--|<--| LED10
         |    LM3914
        GND 

Simply adjust the 5K pot so the reference voltage is 1V (at pin 6).  
Connect 12Volts, GND and the Lambda sensor and you're ready to go.  I 
guess the component cost would be 5-10 dollars.  I haven't built it 
yet as I only saw the schematic today.


                /| | | |\  |   |\  | | |\  |  AudiDudi@delphi.com
               /-| | | | | | = | | | | | | |  Jeffrey Goggin
              /  | |_| |/  |   |/  |_| |/  |  Scottsdale, Arizona