Archive for September, 2010

Voltage Isolator

Posted: September 25, 2010 in r/c airplanes

Had a conversation at the field about the JR 791 High Torque Servo.

http://www.horizonhobby.com/Products/Default.aspx?ProdID=JRPS791#quickSpecs.

Turns out that the three of us had burned these servos up because we weren’t aware that they can only handle 4.8v. Now, you’d think that a more expensive higher torque servo would handle the same voltage as the less expensive lower torque version http://www.horizonhobby.com/Products/Default.aspx?ProdID=JSP20080#quickSpecs
but that’s not the case.

So if you have this servo or any other 4.8v servo and need to use it in your 6 volt application you’re going to burn it out unless you use a device I just happened to come across.

It’s a Voltage Isolator from Dionysus Design and cost $17.99.

http://www.dionysusdesign.com/product_info.php/cPath/44/products_id/171

The Voltage Isolator is designed to allow your model to use higher voltages on certain servos and other electronics that should not be powered by 6 volts. The Voltage Isolator provides a barrier between the 4.8v electronics and the 6v electronics.

Can also be used with BEC’s for electric planes.

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