REFLECTOR: Annunicators?

[Hiroo Umeno]

I am tapping into the capacitive fuel level sensor output which gives me 0 to 5V reading based on the amount of fuel in the strake.  When the voltage drops below 0.75V (or thereabout, really) the LED gets illuminated.  Similarly, when the voltage differential between the two capacitive sensor output becomes bigger than something like 0.5V, the fuel imbalance LED gets triggered.

Hope that helps.

Hiroo

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Don Johnston
Sent: Friday, January 28, 2011 4:47 AM
To: reflector at tvbf.org
Subject: REFLECTOR: Annunicators?

Hiroo,

How are you triggering the low fuel and fuel imbalance?

-Don

Message: 2
Date: Thu, 27 Jan 2011 23:52:05 +0000
From: Hiroo Umeno <humeno at microsoft.com<mailto:humeno at microsoft.com>>
Subject: Re: REFLECTOR: Annunicators?
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org<mailto:reflector at tvbf.org>>

Mine has the following (FG, single door) on the annunciator / light control panel.

DOOR - Red
LEFT LOW - Red
RIGHT LOW - Red (lights up when fuel in tank is less than 15%)
SUMP LOW - Red (lights up when fuel in tank is less than 15%)
LOW VOLT - Red (Lights up when bus voltage is below 13V)
FUEL  BAL - Yellow (lights up when the fuel qty difference between left and right becomes more than the preset)
SPD BRK - Yellow
STBY BAT - Yellow (Lights up when on standby battery power)
PITOT HT - Green
LDG LIGHT - Green
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