Miatapower List Archive

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Mail From: Robert Liu <(email redacted)>


I'm running out of space on my car to add gauges! I
was thinking of making a few circuits with either
segmented LEDs or bi/tri color LEDs for oil
temperature, fuel pressure, and voltage. These would
fit right under the radio with a minimum of hassle.

What is a safe oil temperature to start running high
boost / high rpms? What temps would be dangerous for
oils? I checked the Mobil1 website, which lists the
flashpoint temperatures, which may be too high
already.

I would like to have a yellow (cold) - green (good) -
red (too hot) LED for oil temps.

For fuel pressure, I was thinking of doing a 10
segment LED, maybe 5 psi increments.. 20-70 psi?

Again, for voltage, a 10 segment LED with 1 V
increments from 5-15 volts

If anyone has input regarding oil temps, I would
appreciate it!

Bob




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Robert Liu
(email redacted)
ICQ# 22765210


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This read-only message was archived from a public mail list.
Mail From: "Ralph" <(email redacted)>


A couple years ago I was going to use a piezo speaker to tune with an O2
sensor. I liked the idea of a beep instead of a light so it wouldn't
distract the eyes from the road. Was going to add PCB relays to the LM chip
meter I made and switch the peizo on, higher pitch, and warble high pitch
for the lean zones. Seems to me that a buzzer would get your attention
faster (YMMV).
The gauges I had under the radio were only useful to me when parked.

Was driving home yesterday in 95* heat with AC going and taking the crop to
her like a rented pony. Came to a stop light and the temps pegged. Never
even thought to look at the gauge in traffic. 10 seconds with the heater on
brought it back down.

Ralph Doehrmann
Sunburst Yellow
BB Garrett, Link, FM, BEGI