Fill the hole case with Plastidip. Works perfect.
In the early day's the LRP QC2 and QC3 where filled up with Epoxy (or something). The whole printboard was coverd in epoxy, so there couldn't come any water near.
I use the same technique, but then with PlastiDip. This flued becomes rubbery after it's dry and works like a charm! Servo, Receiver, speedo, sensorboard.
Main thing is I do this with all my electronics, without thinking is it going to be dry or wet today. My normal dry racing electronics are waterproofed, so when it starts raining I can just cary on racing. Don't need any additional waterproofing! So easy!
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