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View Full Version : Opto-isolators and caps for 2.4GHz


aaron07
02-04-2008, 06:12 AM
I am no expert, but I would like to know if this could assist with the stock align esc/2.4GHz brown out issues.

In high powered wings where the electronics are stuffed into small places, a trend is, using (a.) opto-isolators between the esc and receiver (b.) caps (spektrum capacitor) on the receiver.

Wouldn't these two things as well as grounding the ESC eliminate 'brown outs"?

a.) Features of the Medusa opto-isolator are:
Converts any ESC with a Bec to an Opto-isolated input.
Isolates potentially harmful electrical noise.
Allows the seperate use of a receiver battery in systems where the esc has a battery eliminator circuit, without modifying any wiring.
Allows the use afo seperate BEC, such as the Medusa Research Potencia Bec, by isolating the ESC's power supply from the receivers power supply.
Note: The opto-isolator requires that your esc is equipped with an on-board BEC circuit, and that your receiver has it's own seperate power supply, such as a flight pack or Potencia BEC.

quote from OPTO-ISOLATOR Operation manual Model MR-OPTO-001

b.) Spektrum Capacitator: 4700UF 10V
This holds a temporary charge for your receiver (if I understand correctly.....it's all new to me ) if you get a glitch or temporary power loss from a power surge eating into receiver power, hence, maintaing signal between controler and receiver. (Please explain if I am in-correct)

Aberdeen
02-04-2008, 06:34 AM
I dont think anybody is having brown out issues.
Allthough they might of thought they did..
Problems are related to noise issues.

Those product mentioned have little or no effect to the amount of EMI/RFI generated by the motor.

You can make that spectrum cap very easy btw, and even better.

The Opto thing is not a good soulution. creating dual grounds and power paths, and using a common floating signal between components, leaves an open window for data/signal corruption...(more room for failure.) Another note; Dependent on the frequency of Noise can pass through Optically.

These are lame attempts to try to bandaid / Mask an unkown source of a problem.

Anthony

Pinecone
02-04-2008, 09:37 AM
The Spektrum cap holds a whoppy 0.059 watt seconds of power. So at 5 volts, and a paltry 1 amp, that is 0.012 seconds. At 5 volts and 2 amps, that drops to 0.006 seconds.

aaron07
02-04-2008, 10:19 AM
THnaks for clearing that up. Do you think the same applies for wings?

Aberdeen
02-04-2008, 10:38 AM
The Spektrum cap holds a whoppy 0.059 watt seconds of power. So at 5 volts, and a paltry 1 amp, that is 0.012 seconds. At 5 volts and 2 amps, that drops to 0.006 seconds.
PIne,
there is a bit more to it..