Print Page - Difference between Channel 3 throttle output and pwn output ?

Title: Difference between Channel 3 throttle output and pwn output ?
Post by: riteshbrd on August 15, 2020, 08:46:27 PM

Hi!
I would like to know the difference between Chanbel 3 throttle output and pwm output for the receiver, particularly for fsi6.

How to drive coreless DC motor with FS2A 4CH AFHDS 2A?

can we directly connect DC coreless motor to this FS2A? or brushed ESC is compulsory?

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 15, 2020, 11:05:29 PM

The PWM one is referring to is the servo output signal ( 1ms to 2ms high with 50hz refresh rate) and output on channel 3 happens to be for throttle signal from your radio.

NO one cannot directly connect dc or any motor it will burn up the output pin ! Yes one needs a Electronic speed controller or ESC brushed or BLDC

Check these links

https://www.rc-airplane-world.com/radio-control-gear.html

https://www.rc-airplane-world.com/rc-servo.html

https://www.rc-airplane-world.com/radio-control-functions.html

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 15, 2020, 11:09:22 PM

https://www.superdroidrobots.com/shop/custom.aspx/remote-control-rc-support/40/

Assuming you are talking about 720 or 820 type micro drone dc motors with 55/65mm props.

https://hobbyking.com/en_us/hobbyking-3a-single-cell-esc-brushed-micro-motors.html?queryID=84f731aa91c0101f448980acaab1126c&objectID=35077&indexName=hbk_live_magento_en_us_products

https://hobbyking.com/en_us/power-systems/speed-controllers/brushed-esc.html

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: riteshbrd on August 16, 2020, 07:53:56 AM

My question is yet not answered, let me ask other way....
Micro esc for coreless motor , where pwm is mentioned, connecting channel 3 with that will give desired results?
#Aliexpress Rs. 308.92 50%OFF | Ultra Light Mini Brushed ESC Single Way 5A/10A 1S LIPO Electric Speed Control One-Way ESC for RC Airplane Aircraft Drone Plane
https://a.aliexpress.com/_dXjeSFy

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 16, 2020, 10:29:12 AM

Quote from: riteshbrd on August 16, 2020, 07:53:56 AM

Yes it should work with FS2A 4ch AFHD 2A.

Note: From online sites it seems FS2A 4CH AFHDS 2A is rated to work from 3.3v to 10v. This will work with 1S and your ESC but on high loads to battery, voltage can drop below 3.3v which can make the RX stop and lose connection to tx(need to check this once).

https://www.rcgroups.com/forums/showthread.php?3139424-Flysky-FS2A-4-channel-mini-receiver-from-BG

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: riteshbrd on August 16, 2020, 02:22:33 PM

ok,
Does it mean that it will not work with fsiA6 receiver ( default receiver comes with fsi6)?

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 16, 2020, 03:11:18 PM

No FSIA6 operates from 4v.

https://www.flysky-cn.com/ia6-canshu

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 16, 2020, 03:14:08 PM

There is a work around but it’s not safe! One can try 3v to 5v DC-DC step up converter but risk of draining the battery dead is high.

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 16, 2020, 03:15:29 PM

What is that you are looking to do ? Make micro rc plane ?

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: riteshbrd on August 16, 2020, 04:43:40 PM

yes sir.
I have 50gm hand throwing epp plane,
coreless motors 8020 , micro esc , tx-rx(fsi6) but
stucked up at receiver pwm.
And as you rightly said when i connect TX,RX and ESC with 1S; TX starts buzzing low voltage for RX.

do have better suggesstion/idea....otherwise i am planning to go for fs2a .
what u say? should i go for it?

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: sahilkit on August 16, 2020, 06:43:24 PM

Dear Ritesh

Go for the FS2A 4CH (AFHDS 2A - protocol) and brushed esc you mentioned.

posting the thread link again, check it.

https://www.rcgroups.com/forums/showthread.php?3139424-Flysky-FS2A-4-channel-mini-receiver-from-BG

Title: Re: Difference between Channel 3 throttle output and pwn output ?
Post by: riteshbrd on August 16, 2020, 07:20:55 PM

Quote from: sahilkit on August 16, 2020, 06:43:24 PM

Roger that, over and out

Quote from: sahilkit on August 16, 2020, 06:43:24 PM

Roger that, over and out sir

RC India

General Topics => Chatter Zone => Topic started by: riteshbrd on August 15, 2020, 08:46:27 PM