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Purchased A 'FlySky' FS-GT2E Transmitter & Receiver
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 Posted: Sun Jun 24th, 2018 12:14 pm
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Helmut
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@Si

I think I wrote that I replaced the original 7805 by an LM 2940.

The power supply voltage was reduced to 6V nominal ( 5 NiMHs ).

Later I used an LM3940 for a newer 3V3 board.




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 Posted: Wed Jan 23rd, 2019 08:46 am
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Si.
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Hi Helmut  :wave:


Sorry for the late reply.  :old dude:

TOO MUCH to do & not enough ... :time:

Thanks for your Voltage regulator-chip rec.  :thumb:



I have been looking at a bunch of 'Low Drop Out' (L.D.O.) Voltage regulators, for another project.  L:



I have been a bit reluctant to tear-apart my perfectly good & working 'FlySky' throttle ...

... as I have considered buying one of the slightly newer ones to mod, which operate on 3.7 Volts, rather than 6 Volts.



Obviously it is somewhat of an advantage to be able to use just one 3.7 Volt Li-Po ...

... as opposed to either two 3.7 Volt Li-Po, or four AA / AAA batteries as a power source.  :cool:



I suppose an old-school square 9 Volt could be used, if one really wanted to ...

... half the available Voltage of course, being 'burned up' in any Voltage regulator used.  :!:



It would be nice & simple, to be able to use a single 3.7 Volt Li-Po as a Transmitter battery ...

... a very small D.C. to D.C. step-up board, could also be used ...

... if the slightly older 5 Volt board Transmitter was modded.  :P



Mmm ...

Lots of stuff on the bench as usual.  :shocked:

Electronics being the current clutter getting the once-over !  ;)



L a t e r  .  .  .



:moose:



Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

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 Posted: Wed Feb 27th, 2019 09:04 pm
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Si.
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These new extra-small 'FlySky' Receivers are worth checking out.  :thumb:

Only £4.99p on eBay ... Inc. P&P !  :)



Specifications:

- Item name: 'FlySky' FS2A-4CH Receiver
- Channels: 4CH
- Output signal: PWM
- Frequency range: 2.408-2.475GHZ
- Band width: 135
- Receiver sensitivity: -92DBM
- 2.4G mode: 'AFHDS' 2A
- Failfe: Yes
- Supply voltage: 3.3-10V
- Distance: 400+ meters
- Working current: 20MA
- Size: Approx. 11 x 25 mm / 0.43" x 0.98"
- Support: FS-I6, FS-I6X, FS-I6S, FS-TM8, FS-TM10, FS-I10 & other 'AFHDS' 2A protocol Transmitter











:cool: :cool: :cool: :cool: :cool:



Si.








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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Thu Feb 28th, 2019 03:27 am
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tebee
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Where did you find it for £4.99 - cheapest I can see is £5.90?


Tom




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 Posted: Thu Feb 28th, 2019 10:50 am
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Si.
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Hi Tom  :wave:



It's gone up in price by 38p !  :f:


Search on eBay Worldwide :- FS2A 4CH


It's up for £5.37p inc. P&P



;)



Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Sun Mar 3rd, 2019 05:33 pm
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Michael M
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Is it possible for an ESC to go bad?

When I power up, the loco runs fine for a few seconds and then stops.

Using a 7.4 Volt 500mAh Li-Po and it's fully charged (tested it).

Unfortunately I don't have a spare ESC that I can swap out at the moment.




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Michael
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Nye, Inyo & Esmeralda Railroad
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 Posted: Sun Mar 3rd, 2019 06:01 pm
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Si.
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Hi Michael  :wave:



I'm guessing that the E.S.C. you have there, WAS working OK, at sometime in the past ?  ???



It is 'possible' that STATIC may have killed something.  :shocked:

Always worth taking precautions against, just in case, but you kinda have to be 'unlucky' for that to happen.  :f:



Woodie  :cb:  suggested in the past, looking for jammed motor/mechanism parts, for a non mover.



As I'm sure you know already, pretty much the only 'testing' that can be done, is 'parts swapout'.  L:



If the battery is fully charged & the Transmitter 'BINDS' to the Receiver OK ...

... I guess the E.S.C. is the most likely problem.  :dt:


Mmm .  .   .



:mex:



Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Sun Mar 3rd, 2019 06:10 pm
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bobquincy
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Michael M wrote: Is it possible for an ESC to go bad?

When I power up, the loco runs fine for a few seconds and then stops.

Using a 7.4 Volt 500mAh Li-Po and it's fully charged (tested it).

Unfortunately I don't have a spare ESC that I can swap out at the moment.


Some ESC motor drivers have an overcurrent shutdown feature that could do this.

A good way to test the ESC is with a resistor that draws about 1 Amp at full throttle (7.5 ohms in this case) they are inexpensive. 
Check the voltage across the resistor to see if the ESC is delivering full voltage at a reasonable current.




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 Posted: Sun Mar 3rd, 2019 06:51 pm
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Michael M
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Si,

I've hooked up leads to the loco and the motor runs just fine.



Bob,

I'll try testing the ESC like you suggested and see what I get.



Everything worked fine in the past so maybe a gremlin sneaked in. 

Note to self:  Keep spares on hand to swap out in case of trouble.




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Michael
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 Posted: Sun Mar 3rd, 2019 09:07 pm
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Michael M
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Bob,

Don't have the required resistor on hand to test the ESC. 


Gonna try a few other ways to see if that ESC works.

Went ahead and ordered two ESCs just to have some extra on hand.





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