toolmaster wrote:The KLR computer's job is to limit ignition timing and prevent detonation by compensating for boost pressure.
What is KLR? I've not heard of it, and Google
only dished up the Kawasaki motocycle KLR650
toolmaster wrote:The driver circuit in the KLR sends signal through
a 1.9k ohm and then a 2k ohm resistor, then to
Is anything else on the junction of those two
resistors? Why not use a single 3k9 resistor?
toolmaster wrote:The gauge measures about 1k ohms resistance.
If I insert a 9k ohm resistor in series with the two
others that drive the gauge, the deflection remains
Really? Ohms law would suggest otherwise.
toolmaster wrote:If I put a 9v battery with a pot between the
terminals adjusted from 0-5v, the gauge
swings full deflection as I move the pot adjustment
What value pot?
toolmaster wrote:Also - I did go to radio shack today to get supplies. The only thing I neglected to get was a 7808 ot a 7812 regulator, which prompted the question before if we can drive the signal out of the op-amp rail to rail, which we can't
I doubt RS would stock a '7808. You can stack two
LM7805 parts together to get 10V (but on 12V battery
this is a bit of a dodge, its okay on 13.8V).
Also, you can lift the ground pin of the '7805 to also
raise the output. Try 220R from Vout to its Gnd and
150R from Gnd to your system Gnd. Should be 8.4V
(plus or minus the 5% tol resistors).
The LM324 op amp can't swing to its rail but it can
get to about 1.5V below the rail. On an 8V supply
you will get 6V out, well in range of your 5V spec.
If you are unhappy about feeding more than 5V to
the gauge, strap it to ground with a 5v1 or 5v6 zener