Optoisolators
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07/17/2013
Earthmen Productions
Earthmen Productions
Dec-00-Mar-12

 

 

 

 

Home | 360 degree Servo | Optoisolators | Servo Noise Traps | Servo Reversers | Servo Reverser | Servo Failsafes | Servo Fail-Safe | Servo Slow-Down | Servo Panner | Servo Sequencer
Updated: July 17, 2013

R/C Servo Opto-Isolator Projects

History

Parts

Building

Testing & Operation

Notes

Note: All pictures that follow are "clickable".  Clicking on them will show you an enlargement!

A lil' history ...
    This project shows you how to build your own servo optoisolator.  What the heck is an R/C servo optoisolator you ask?  A servo optoisolator literally isolates the power AND signal connections between your R/C receiver and the servos.  How does it do this?  Optoisolator ICs are used which optically isolate the servo control signals.  The servos are also powered from a separate battery from that of the R/C receiver.  Why use an optoisolator?  R/C gear is susceptible to noise from such sources as gas engines, electric speed controllers, switching power supplies and and other sources you probably don't know or thought about (i.e. spurious interference).  In larger aircraft, long servo leads are used to connect the servos to the receiver.  These can often be on the order of 2-3 feet, sometimes even more.  If not properly routed and/or protected (i.e. cokes/ferrites), these long leads can often act as "antennas", picking up spurious interference, inside and outside your plane.  Because these are connected directly to your receiver, this interference is propagated back into your receiver, potentially causing degradation of your receiver's ability to properly decode RF being transmitted by your transmitter.  An optoisolator COMPLETELY eliminates this potentially devastating and often tragic event (it's happened to me twice... I'm not waiting for a 3rd).

Design Criteria Summary:

1) ...more coming soon
2)

Parts & Tools List ...

1) ...more coming soon
2)

Building Instructions...

...more coming soon

 

Testing & Operating Instructions...

...more coming soon

 

Additional Notes...
Some more servo optoisolator project info:
http://home.concepts-ict.nl/~delemarre/id96.htm

 

 

This circuit to the left does not use input/output amplifiers/buffers (just optocouplers)

 

 

 

Earthmen Productions
Earthmen Productions
Dec-00-Mar-12

horizontal rule

horizontal rule

 

        

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This site was last updated 03/30/12