you can get something like this one
the higher the capacity the better
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| Stock trex 470L failed BEC test? https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=3657 |
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| Author: | HateTheDrake [ Wed 27. Nov 2019 15:34:47 ] |
| Post subject: | Stock trex 470L failed BEC test? |
So I had a weird crash recently where it became unresponsive. Others point to the stock 50a esc as being too weak. Just to confirm: the esc needs to survive the BEC stress test which tries to simulate peak load, correct? Mine, using the stock DS450M servos, logs low voltage and rx loss each time. I bumped esc voltage output to 8.5 and it now reboots towards the end of the test. |
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| Author: | HateTheDrake [ Wed 27. Nov 2019 15:39:43 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
Also note: this is on a standard spirit with a single dsmx sat. The crash was on firmware 2.6.3 or 2.6.4. All the BEC tests were on 2.7.1. Sent from my iPhone using Tapatalk |
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| Author: | ZeXx86 [ Wed 27. Nov 2019 15:50:01 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
Hello, I am afraid you will have to add external capacitor to help the BEC or to lower the voltage. With higher voltage current is increasing actually causing bigger voltage drops. It might work better with 6V but I recommend to add electrolytic capacitor of 2200 - 4700uF. |
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| Author: | HateTheDrake [ Wed 27. Nov 2019 15:53:45 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
Thank you. I do plan to lower voltage back to the default of 6. I’m not familiar with adding a capacitor, will need to research. Everyone keeps saying to get a new esc. (HW or castle) Sent from my iPhone using Tapatalk |
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| Author: | urgno [ Wed 27. Nov 2019 16:34:43 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
you can get something like this one the higher the capacity the better
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| Author: | HateTheDrake [ Wed 27. Nov 2019 20:02:31 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
Thanks guys! Sent from my iPhone using Tapatalk |
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| Author: | dub [ Thu 28. Nov 2019 7:20:37 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
Attachment: r2-buf-325-rtf.png [ 323.66 KiB | Viewed 504 times ] Hi I have these capacitors and I am fully satisfied |
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| Author: | urgno [ Thu 28. Nov 2019 9:58:27 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
R2 buffer is the Ferrari of the capacitors 
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| Author: | HateTheDrake [ Tue 03. Dec 2019 3:26:43 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
I put one of these on the BEC port and it passed many tests without errors or rx drop. ...even on 8v. I’m not sure what this is rated at, maybe 2474uF. Thanks!  https://www.hobbyrecreationproducts.com ... -capacitor |
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| Author: | Genesis [ Tue 03. Dec 2019 15:30:22 ] |
| Post subject: | Re: Stock trex 470L failed BEC test? |
urgno wrote: R2 buffer is the Ferrari of the capacitors Yes they sure are, too bad no one sells them anymore, at least not that I could find. |
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