Needs helps with rc car | Drone Community | Page 1

paper seal Apr 18, 2025, 9:53 PM

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Idk where to put this so it's goin here. So, I got this RC car about 5 years ago? Dunno when, but it's a Dromida SC418. I stopped driving it for some reason, I think it broke? But now I'm trying to fix it. The car turns on, servo for the wheels twitches upon power, as normal (I think), and the controller? That seems broken. The batteries, four AA batteries, were fully charged, a little over 1.5v each. Normal. It has a spot with a on/off switch, plus two LEDs. When I switch the switch to on, nothing happens. No connection to the car. I have no idea what to do to troubleshoot, any ideas would be greatly appreciated. I just wanna get this to work...

leaden folio Apr 18, 2025, 9:55 PM

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send some clear pictures of the controllers pcb

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and do you have a multimeter?

paper seal Apr 18, 2025, 9:55 PM

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leaden folio and do you have a multimeter?

Yes

paper seal Apr 18, 2025, 9:56 PM

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leaden folio send some clear pictures of the controllers pcb

leaden folio Apr 18, 2025, 9:59 PM

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some corrossion on that board starting

paper seal Apr 18, 2025, 9:59 PM

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Oh

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I mean, it was sitting in the garage for a couple years

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Is it unusable?

leaden folio Apr 18, 2025, 10:00 PM

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no

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but the power switch is entirely rusted I think?

paper seal Apr 18, 2025, 10:00 PM

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Looks it

leaden folio Apr 18, 2025, 10:00 PM

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you should start by just giving it a really good scrub with isopropyl

paper seal Apr 18, 2025, 10:00 PM

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The whole board?

leaden folio Apr 18, 2025, 10:00 PM

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the whole board, especially try to scrub off the corrossion

paper seal Apr 18, 2025, 10:00 PM

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I gotta go find some IPA then...

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And a brush

leaden folio Apr 18, 2025, 10:00 PM

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power switch seems to be the only thing that's really bad

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easy to fix though

paper seal Apr 18, 2025, 10:01 PM

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I've got other switches I can replace it with, not the exact same

leaden folio Apr 18, 2025, 10:01 PM

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as long as it works as a switch I suppose

paper seal Apr 18, 2025, 10:05 PM

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I'll clean it in a bit, dinner time

paper seal Apr 18, 2025, 10:33 PM

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leaden folio you should start by just giving it a really good scrub with isopropyl

I scrubbed it so well the battery wire broke off

leaden folio Apr 18, 2025, 10:34 PM

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lol

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be careful because there's tiny components you don't want to knock off either

paper seal Apr 18, 2025, 10:34 PM

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leaden folio be careful because there's tiny components you don't want to knock off either

Oh...

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I don't see any tiny components broken off

leaden folio Apr 18, 2025, 10:36 PM

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good!

paper seal Apr 18, 2025, 10:41 PM

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Is isopropyl alcohol conductive?

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Can I plug it in with it still a lil wet

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Like the switch might have some inside

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Oh wait I forgot the wire was broken

leaden folio Apr 18, 2025, 10:43 PM

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paper seal Is isopropyl alcohol conductive?

most likely yes

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it is part water

paper seal Apr 18, 2025, 10:47 PM

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leaden folio it is part water

Mines more water... I've got 70% which means 30% is water... I need to buy some 99% or smth

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I mean, if the switch shorts, that just means it turns on, which is fine?

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OMG THE LEDs WORK!!!!

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CREPE

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I powered both on and it just WENT

leaden folio Apr 18, 2025, 10:53 PM

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lol

paper seal Apr 18, 2025, 10:53 PM

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I think the throttles broken

leaden folio Apr 18, 2025, 10:53 PM

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that poor rusty switch

leaden folio Apr 18, 2025, 10:53 PM

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paper seal I think the throttles broken

well... just clean those contacts as well

paper seal Apr 18, 2025, 10:54 PM

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Why's it have a throttle trim

leaden folio Apr 18, 2025, 10:54 PM

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no clue

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but that's funny

paper seal Apr 18, 2025, 10:55 PM

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Imma go clean it more

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I'm so old my back hurts

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Well, at least it works

paper seal Apr 18, 2025, 11:04 PM

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leaden folio but that's funny

It was the trim

leaden folio Apr 18, 2025, 11:04 PM

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yippee

paper seal Apr 18, 2025, 11:04 PM

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Time to take it outside

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Do you think I should fix this first?

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Anyways tysm for your help

paper seal Apr 18, 2025, 11:24 PM

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It works

leaden folio Apr 18, 2025, 11:47 PM

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next step is elrs of course

paper seal Apr 19, 2025, 12:14 AM

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leaden folio next step is elrs of course

Yeah, but I don't invision doing much rc car stuff, just wanted to fix this one cause it's been sitting... might sell it too, I don't really have a use for it

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Although I can't really sell it cause the battery situation

mild hull Apr 19, 2025, 4:31 AM

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paper seal Idk where to put this so it's goin here. So, I got this RC car about 5 years ago...

I think I have something similar new sitting in a bag that has been gutted

light prawn Jun 12, 2025, 2:08 PM

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paper seal It works

Good

paper seal Jun 12, 2025, 2:27 PM

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Hmm... "1 blocked message"

#Needs helps with rc car