A better way to wire anti-spark device

[egneg]

I will chime in hear as I have a little knowledge in this area being an electrician and remembered hearing someone talk about this in class(when your older you like learning new stuff).Currnet will travel all paths of resistance, even in parallel circiuts. ex. your house lights, receptacles all are parallel. everything thing works at the same time and all have different resistances. so if you leave the resistor pluged in it will consume some energy from your battery. here is a formula kinda hard to put in but, voltage squared/resistance=watts ex. 14.8x14.8 / 10ohms = 21.904 watts of wasted battery

here is a good link for better explanation: http://www.mikeholt.com/technical.ph...ce?%20(2-8-2K)

Sorry to burst your bubble but in a parallel circuit the total resistance will be less than the smallest resistance - Ohms law.

[fla350tt]

Sorry to burst your bubble but in a parallel circuit the total resistance will be less than the smallest resistance - Ohms law.

thanks for reminding me was stuck on the resistor consuming energy in the parallel circuit.

[SweetAccord]

Guess my picture was cut off somehow. Current.jpg The red line (arrow) is the flow of current. egneg is correct as all the others who are stating it will have not effect.

[kevinpratt823]

I will chime in hear as I have a little knowledge in this area being an electrician and remembered hearing someone talk about this in class(when your older you like learning new stuff).Currnet will travel all paths of resistance, even in parallel circiuts. ex. your house lights, receptacles all are parallel. everything thing works at the same time and all have different resistances. so if you leave the resistor pluged in it will consume some energy from your battery.

so better to disconnect the resistor


here is a good link for better explanation: http://www.mikeholt.com/technical.ph...ce?%20(2-8-2K)

Except this is not that kind of paralell circuit, it is a series-paralell, the resistor is only in paralell with a set of bullets (that create a dead short), it is not in paralell with the power source and it's other loads like you describe the lights and outlets in a house. You are correct that there will be a minute ammount of current flowing through the resistor, but the total resistance of the connection will actually be a fraction lower than if the resistor was unplugged, therefore it is actually a more efficient connection, not wasting power. If the resistor went across/in paralell with the batts and esc, THEN it would be consuming and wasting electricity, but in this case, every electron that flows through the resistor does so on it's way directly to the esc.

[ray schrauwen]

Visual Inspection can turn up some failures, but it's not a sure bet.
A Huntron Tracker could check the Cap in circuit, but you'd have to map one out before it blew...and they are a pretty spendy tool.
Pulling the Cap to test is a real pain in the rear.

If I don't see a spark I discharge the Cap and try again. I've found the Caps bad on two AQ60 ESC's (older ones) this way and was able to replace them before any other damage occured.

I can think of better ways but they sure aren't easier!
What did you have in mind?

This is why I am starting to change the caps on esc's as soon as I buy them with quality capacitors and I can test them first. Who knows how big the bin of caps is and where it came from when they build your esc. All the Suppo esc's and other branded versions use the same FET's that have been discontinued in the USA for years and were probably bought by the ton for pennies. This happens quite a bit with manufacturing electronics overseas.

[oscarel]

Some of the most expensive ESC's made (MGM) come with anti-spark so it must not be too bad an idea. They even come with up to a 5 year warranty now.

[ray schrauwen]

I'm pretty sure the companies like MGM, Schulze, etc. got their caps from a reliable source and not a massive overstock or discontinued bin of FETS. That is why they can give better warranties. I'm not sure if it's MGM that uses 2 Driver FET stages instead of one like 95% of all esc's out there including Castle. Doubling the driver FET stage really helps the esc be more reliable.