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« on: May 19, 2017, 05:53:02 PM »
rastsaurabh
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Looking for some Support guys!!!

I am looking for an ESC for Brushed  1S motor 5-6 Amps.

I have a HiSKY brick ( rx + 2 Linear Servo + low amp  coreless motor ( brushed) Esc) on it.  I need your help to make a ESC, or drive a high Amp MOSFET through brick.

I tried to put a external MOSFET and drive it through Input to Mosfet on Brick... it worked but i think the external MOSFET i used was not a logic level Mosfet.

Can you help ...
1. Any trusted brushed ESC ckt to drive a brushed motor ( 1S and 5amp) something like AT tiny ESC thread on RCGROUPS

2. which high ( 5 amp) logic level Mosfet i can use to be driven by Brick ( using NO additional battery)

3. Where to buy Mosfet from?

Regds
Saurabh
whatsapp 8826298725.
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« Reply #1 on: May 19, 2017, 09:16:56 PM »
kiran rc
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How was the external mosfet connected? Through the mosfet on board?
Irlml2502 is one of the best for the purpose. It's rated around 4amp.Unfortunately, these aren't stocked by any electronic stores.
Alternatively ,standard package mosfets can be used but will add a gram or two.
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« Reply #2 on: May 19, 2017, 09:57:41 PM »
rastsaurabh
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I took out a tapping from gate of onboard mosfet.

Unlike your  sub gram model my models won't mind 2-3 grams as they will be around 50-75 grm
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« Reply #3 on: May 19, 2017, 10:31:40 PM »
kiran rc
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Unlike your  sub gram model my models won't mind 2-3 grams as they will be around 50-75 grm
Grin

You can try FDS7088n3(available at ebay IN).
« Last Edit: May 19, 2017, 11:30:49 PM by kiran rc » Logged
 

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« Reply #4 on: May 19, 2017, 11:53:51 PM »
K K Iyer
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?

IMG_0954.jpg
Re: looking for an ESC for Brushed 1S motor capable of 5-6 Amps
* IMG_0954.jpg (52.02 KB, 800x530 - viewed 75 times.)
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« Reply #5 on: May 20, 2017, 07:18:40 AM »
saikat
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use a power transistor and connect the base to the drain(not the gate) of the on board mosfet.
since transistor is current  and not voltage driven (only .7 v required) -it should have no problems reaching saturation.

use appropriate resistor wen connecting the base.
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« Reply #6 on: May 20, 2017, 02:23:46 PM »
rastsaurabh
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Iyer sir this is exactly I am looking for but a bit smaller.
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« Reply #7 on: May 21, 2017, 12:08:23 AM »
Voice of deaf
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Get a 30a brushless ESC , a non working one , and remove some MOSFETs , I think on my ESC, one MOSFETs could drive 15 a continuous you could use them. I guess they'll work for 4.2 volts as well,
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« Reply #8 on: May 21, 2017, 09:36:18 AM »
rastsaurabh
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Thanks for suggestion !! but the FET on ESC do not work on 5volt. I used the same and it did not work for 5 volt but it worked on 7.5 volts.
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« Reply #9 on: May 21, 2017, 11:52:45 AM »
Balakrishna Reddy
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Hi saurabh sir,
It looks like you are still struggling with mosfets.
I think you can try darlington pair of transistors instead. They need low base to emitter voltage for turn ON so your brick can power it. However you need to add little more circuitry to make it work properly.

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« Reply #10 on: May 21, 2017, 03:47:46 PM »
Voice of deaf
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Thanks for suggestion !! but the FET on ESC do not work on 5volt. I used the same and it did not work for 5 volt but it worked on 7.5 volts.
That's the problem , one needs to get logic level MOSFETs  I guesss
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