Matt's RV-8 Project



Matt Dralle's RV-8 Project
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Date:  3-12-2009
Number of Hours:  3.00
Manual Reference:  
Brief Description:  Added A Button To Engage GPU Relay

I got a new high-current battery charger that is microprocessor controlled and is suppose to do a much better job of keeping the battery correctly charged when it is connected. After connecting it up to the RV-8 via the GPU (Ground Power Unit) plug, however, I discovered that the new charger wouldn't start charging until it saw at least 4 volts from the *battery* (this was confirmed by reading over the charger manual a couple of times). The GPU relay on my RV-8 is setup to activate from a +12 volt voltage coming from the *GPU*, so the new charger would never turn on. I added a small push button next to the GPU plug that now allows external activation of the GPU relay which enables the new charger to work correctly. Sweet.
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GPU Engage Button on Left

GPU Engage Button on Left

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Button Connects to GPU Relay Input

Button Connects to GPU Relay Input

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Source of Power For GPU Button

Source of Power For GPU Button

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