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Hi all,

can anyone point me to where I can find the signals used in R/C models ? specifically the output of the reciever to a motor controller ?

is is serial ? pulse ? DC ?

Dave



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Dave,

The signal that the servo / esc will use is pulse proportional
modulated. The frame rate is 20 ms with each channel having a 1ms pulse
(1.5ms represents centre stick). So in your ESC 0.5ms pulses represent
zero throttle, a 2ms pulse being full throttle.

Hope that helps

Malcolm

Dave Mucha wrote:

> Hi all,
>
> can anyone point me to where I can find the signals used in R/C models ? > specifically the output of the reciever to a motor controller ?
>
> is is serial ? pulse ? DC ?
>
> Dave >
> to unsubscribe, go to http://www.yahoogroups.com and follow the
> instructions >
> SPONSORED LINKS
> Microcontroller
> <http://groups.yahoo.com/gads?t=ms&k=Microcontroller&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cAFu8D0WTcCC_wz2NML1-Q>
> Microprocessor
> <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=jWbBHutp0PsKo377UAUUMg>
> Microchip pic
> <http://groups.yahoo.com/gads?t=ms&k=Microchip+pic&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cxg8HXTXLd38eREw0NTdfg>
>
> Microcontrollers
> <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=DeL_q0mswAJpbTtV5gZLtg>
> Picmicro
> <http://groups.yahoo.com/gads?t=ms&k=Picmicro&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=P9Ud3iRS9q41PF4ow2FeKw>
> Pic microcontrollers
> <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=BinyHzQVxJIQb20faX-pOQ >
> ------------------------------------------------------------------------
> >. > ------------------------------------------------------------------------



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What is the english term for a washer + solder eye?

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu




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I've heard them called solder lugs or lockwasher lugs - Keystone makes
them here in several different styles.

Paul

Wouter van Ooijen wrote:

>What is the english term for a washer + solder eye?
>
>Wouter van Ooijen
>
>-- -------------------------------------------
>Van Ooijen Technische Informatica: www.voti.nl
>consultancy, development, PICmicro products
>docent Hogeschool van Utrecht: www.voti.nl/hvu >to unsubscribe, go to http://www.yahoogroups.com and follow the instructions
>Yahoo! Groups Links




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----- Original Message -----
From: "Wouter van Ooijen" <wouter@wout...>
To: <piclist@picl...>
Sent: Saturday, September 03, 2005 9:59 PM
Subject: [piclist] washer + solder eye > What is the english term for a washer + solder eye?

Solder tag:

http://www.rapidelectronics.co.uk/rkmain.asp?PAGEID=80010&CTL_CAT_CODE=&STK_PROD_CODE=M31344&XPAGENO=1

Leon
--
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--- In piclist@picl..., Malcolm <malcolm.crabbe@n...> wrote:
> Dave,
>
> The signal that the servo / esc will use is pulse proportional
> modulated. The frame rate is 20 ms with each channel having a 1ms
pulse
> (1.5ms represents centre stick). So in your ESC 0.5ms pulses represent
> zero throttle, a 2ms pulse being full throttle.
>
> Hope that helps
>
> Malcolm

The frame being the speed at which the valu is repeated ?

I assume it is a high value (5v?) for the signal and pull to ground
the rest of the time ?

Does that mean I can send my high ( something between 0.5 and 2ms)
every 20mS to get the motor speed device to run ?

Are there any open source ESC's ? I'm thinking probably in the 25 amp
range. Since my app does not require interfacing with a purchased
unit, it may be easier to make one than to buy one, espically at the
price they are asking.

Dave
>
> Dave Mucha wrote:
>
> > Hi all,
> >
> > can anyone point me to where I can find the signals used in R/C
models ?
> >
> >
> > specifically the output of the reciever to a motor controller ?
> >
> > is is serial ? pulse ? DC ?
> >
> > Dave
> >
> >
> >
> >
> >
> >
> > to unsubscribe, go to http://www.yahoogroups.com and follow the
> > instructions
> >
> >
> >
> > SPONSORED LINKS
> > Microcontroller
> >
<http://groups.yahoo.com/gads?t=ms&k=Microcontroller&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cAFu8D0WTcCC_wz2NML1-Q>

> > Microprocessor
> >
<http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=jWbBHutp0PsKo377UAUUMg>

> > Microchip pic
> >
<http://groups.yahoo.com/gads?t=ms&k=Microchip+pic&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cxg8HXTXLd38eREw0NTdfg>

> >
> > Microcontrollers
> >
<http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=DeL_q0mswAJpbTtV5gZLtg>

> > Picmicro
> >
<http://groups.yahoo.com/gads?t=ms&k=Picmicro&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=P9Ud3iRS9q41PF4ow2FeKw>

> > Pic microcontrollers
> >
<http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=BinyHzQVxJIQb20faX-pOQ>

> >
> >
> >
> >
------------------------------------------------------------------------
> > >.
> >
> >
> >
------------------------------------------------------------------------
>





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Dave,

Yes that's right, the data for each channel, together with a sync pulse
is repeated every 20ms. This is then frequency modulated by the
transmitter and sent to the receiver, which de-modulates the signal and
splits the channels to their corresponding servos. Each channel thus
sends 4.8v or 5v depending on how the receiver is powered (BEC from the
speed controller or 4 x 1.2 Ni-cads) for between 1 and 2ms (sorry I
incorrectly advised 0.5 previously) - 1ms representing 0 stick and 2ms
full stick. This pulse is repeated every 20ms.

There are several ESC designs floating around the Internet. Post the
question on RC-Groups electronics forum
(http://www.rcgroups.com/forums/forumdisplay.php?f=199) and I'm sure
you'll find the info you are looking for. I'm sure there is a
controller for a motor (can't remember if its brushed or brushless)
based on a 12F675 and a couple of FETs - just can't find the link

Malcolm

Dave Mucha wrote:

> --- In piclist@picl..., Malcolm <malcolm.crabbe@n...> wrote:
> > Dave,
> >
> > The signal that the servo / esc will use is pulse proportional
> > modulated. The frame rate is 20 ms with each channel having a 1ms
> pulse
> > (1.5ms represents centre stick). So in your ESC 0.5ms pulses represent
> > zero throttle, a 2ms pulse being full throttle.
> >
> > Hope that helps
> >
> > Malcolm
>
> The frame being the speed at which the valu is repeated ?
>
> I assume it is a high value (5v?) for the signal and pull to ground
> the rest of the time ?
>
> Does that mean I can send my high ( something between 0.5 and 2ms)
> every 20mS to get the motor speed device to run ?
>
> Are there any open source ESC's ? I'm thinking probably in the 25 amp
> range. Since my app does not require interfacing with a purchased
> unit, it may be easier to make one than to buy one, espically at the
> price they are asking.
>
> Dave >
> >
> > Dave Mucha wrote:
> >
> > > Hi all,
> > >
> > > can anyone point me to where I can find the signals used in R/C
> models ?
> > >
> > >
> > > specifically the output of the reciever to a motor controller ?
> > >
> > > is is serial ? pulse ? DC ?
> > >
> > > Dave
> > >
> > >
> > >
> > >
> > >
> > >
> > > to unsubscribe, go to http://www.yahoogroups.com and follow the
> > > instructions
> > >
> > >
> > >
> > > SPONSORED LINKS
> > > Microcontroller
> > >
> <http://groups.yahoo.com/gads?t=ms&k=Microcontroller&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cAFu8D0WTcCC_wz2NML1-Q
> <http://groups.yahoo.com/gads?t=ms&k=Microcontroller&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cAFu8D0WTcCC_wz2NML1-Q>>
>
> > > Microprocessor
> > >
> <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=jWbBHutp0PsKo377UAUUMg
> <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=jWbBHutp0PsKo377UAUUMg>>
>
> > > Microchip pic
> > >
> <http://groups.yahoo.com/gads?t=ms&k=Microchip+pic&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cxg8HXTXLd38eREw0NTdfg
> <http://groups.yahoo.com/gads?t=ms&k=Microchip+pic&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=cxg8HXTXLd38eREw0NTdfg>>
>
> > >
> > > Microcontrollers
> > >
> <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=DeL_q0mswAJpbTtV5gZLtg
> <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=DeL_q0mswAJpbTtV5gZLtg>>
>
> > > Picmicro
> > >
> <http://groups.yahoo.com/gads?t=ms&k=Picmicro&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=P9Ud3iRS9q41PF4ow2FeKw
> <http://groups.yahoo.com/gads?t=ms&k=Picmicro&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=P9Ud3iRS9q41PF4ow2FeKw>>
>
> > > Pic microcontrollers
> > >
> <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=BinyHzQVxJIQb20faX-pOQ
> <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microcontroller&w2=Microprocessor&w3=Microchip+pic&w4=Microcontrollers&w5=Picmicro&w6=Pic+microcontrollers&c=6&s=122&.sig=BinyHzQVxJIQb20faX-pOQ>>
>
> > >
> > >
> > >
> > >
> ------------------------------------------------------------------------
> > > >.
> > >
> > >
> > >
> ------------------------------------------------------------------------
> > > to unsubscribe, go to http://www.yahoogroups.com and follow the
> instructions > ------------------------------------------------------------------------
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Hi Dave,

You might check out Chuck's site; he has some sevo info there.

http://www.mcmanis.com/chuck/robotics/projects/servo.html

Alan KM6VV >
> Dave Mucha wrote: >>Hi all,
>>
>>can anyone point me to where I can find the signals used in R/C models ?
>>
>>
>>specifically the output of the reciever to a motor controller ?
>>
>>is is serial ? pulse ? DC ?
>>
>>Dave
>




(You need to be a member of piclist -- send a blank email to piclist-subscribe@yahoogroups.com )

This site has a simple design using an 8 pin PIC.

http://www.theoldworkshop.freeserve.co.uk/MJNorton/Mike%20Norton's%20Hobbies.htm

Infact, I wanted to design my own speed controller based on ideas from
this page. Gave it up when I went brushless (no maintenence)

Regards,
Eugene

KM6VV wrote:

>Hi Dave,
>
>You might check out Chuck's site; he has some sevo info there.
>
> http://www.mcmanis.com/chuck/robotics/projects/servo.html
>
>Alan KM6VV >
>
>>Dave Mucha wrote:
>>
>>
>>
>>
>>>Hi all,
>>>
>>>can anyone point me to where I can find the signals used in R/C models ?
>>>
>>>
>>>specifically the output of the reciever to a motor controller ?
>>>
>>>is is serial ? pulse ? DC ?
>>>
>>>Dave
>>>
>>>
>> >to unsubscribe, go to http://www.yahoogroups.com and follow the instructions
>Yahoo! Groups Links >
>
>---
>[This E-mail has been scanned for viruses] >

--

Eugene Gopalan
Systems Manager
Sierra Technology (M) Sdn. Bhd.
27, Jalan SS 25/41,
Mayang Industrial Park,
47301, Petaling Jaya,
Selangor Darul Ehsan,
Malaysia.

Tel: 603 78063966
Fax: 603 78063900

Website: http://www.sierra.com.my




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--- In piclist@picl..., Malcolm <malcolm.crabbe@n...> wrote:
> Dave,
>
> Yes that's right, the data for each channel, together with a sync pulse
> is repeated every 20ms. This is then frequency modulated by the
> transmitter and sent to the receiver, which de-modulates the signal and
> splits the channels to their corresponding servos. Each channel thus
> sends 4.8v or 5v depending on how the receiver is powered (BEC from the
> speed controller or 4 x 1.2 Ni-cads) for between 1 and 2ms (sorry I
> incorrectly advised 0.5 previously) - 1ms representing 0 stick and 2ms
> full stick. This pulse is repeated every 20ms.
>
> There are several ESC designs floating around the Internet. Post the
> question on RC-Groups electronics forum
> (http://www.rcgroups.com/forums/forumdisplay.php?f=199) and I'm sure

The ting I hate about those type of forums is that each thread is
sepereate and there are hundreds or thousands of threads. I find I
cannot find the same thread twice.

I have never figured out if there was a date line on the threads so IO
could see posts in chronological order instead of having to go into
each one.

I joined, hope it bears fruit.

Dave



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--- In piclist@picl..., Eugene Gopalan <eugene@s...> wrote:
> This site has a simple design using an 8 pin PIC. http://www.theoldworkshop.freeserve.co.uk/MJNorton/Mike%20Norton's%20Hobbies.htm
>
> Infact, I wanted to design my own speed controller based on ideas from
> this page. Gave it up when I went brushless (no maintenence)

The goal is brushless.

I can buy a brushless contorller for under $50 or less on e-bay. but
how to control is one of the questions, but I have at least a much
better understanding on the signal.

I was/am hoping to find a burshless circuit so I can ultimatly
re-write the input and accept a pot as the input signal.

Dave



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Dave,
a R/C encoder can be made very easily using two standard IC's....
one NE555 timer and a Johnson counter like the HEF4017.
Using the 4017 will give you up to 9 channels, two of them and
you'll have 18 channels.

The basic scheme is that the 555 runs in astable mode, the output
clocks the counter...the outputs of the counter is connected to the
potentiometers and these are fed back to the timer to adjust the
period...thats the "dwelltime" before it clocks the next channel.
One (the last)output form the counter is connected to a fixed
resistor to generate the much longer sync pulse.

All very simple. I built one of these back in the late 70's when I first got
into R/C control & airplanes.
 
 

Dave Mucha wrote:

 --- In p...@yahoogroups.com, Malcolm <malcolm.crabbe@n...> wrote:
> Dave,
>
> Yes that's right, the data for each channel, together with a sync pulse
> is repeated every 20ms. This is then frequency modulated by the
> transmitter and sent to the receiver, which de-modulates the signal and
> splits the channels to their corresponding servos.  Each channel thus
> sends 4.8v or 5v depending on how the receiver is powered (BEC from the
> speed controller or  4 x 1.2 Ni-cads) for between 1 and 2ms (sorry I
> incorrectly advised 0.5 previously) - 1ms representing 0 stick and 2ms
> full stick.  This pulse is repeated every 20ms.
>
> There are several ESC designs floating around the Internet.  Post the
> question on RC-Groups electronics forum
> (http://www.rcgroups.com/forums/forumdisplay.php?f=199) and I'm sure

The ting I hate about those type of forums is that each thread is
sepereate and there are hundreds or thousands of threads.  I find I
cannot find the same thread twice.

I have never figured out if there was a date line on the threads so IO
could see posts in chronological order instead of having to go into
each one.

I joined, hope it bears fruit.

Dave

--
*******************************************
VISIT MY HOME PAGE:
<http://home.online.no/~eikarlse/index.htm>
LAST UPDATED: 23/08/2003
*******************************************
Regards
Eirik Karlsen
 



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