The old NE5044, 5045 and 544 (this last one for the servo innards) are very
difficult to find here in Spain. I think they are discontinnued. Used them
in a project to get 7 temperature measures out from the rotor of an
asynchornous motor (380V, 2Hp) via infrared. Very easy to operate, and
configurables in many ways. But analog, not digital!

Alvaro.

----- Mensaje original -----
De: Andrew Kunz <akunz@TDIPOWER.COM>
Para: <PICLIST@MITVMA.MIT.EDU>
Enviado: viernes, 20 de octubre de 2000 15:27
Asunto: PRIVATE Re: [PIC]:RC aircraft servo controlled by 16F84


> Yes, I did it.  Works great.
>
> Couple suggestions
>
> 1) For a basic system, start with a 16F877
> 2) For a real system, go with a 17C756
> 3) External ADC with differential mode will make life a lot easier
> 4) Use external memory chip to store model memories
> 5) Skip the LCD programming for starters, use RS-232 to a PC instead.
Just
> communicate data, let the PC figure out what to actually display (you
won't need
> big string tables in your PIC this way)
> 6) USE GOOD STICKS!!!
> 7) DON'T USE ASSEMBLY LANGUAGE.  This will be a big project if you do it
right,
> and the last thing you need to worry about is what goes where in memory.
It
> took me several weeks to get it working in assembly, and < 1 week in C.
>
> Andy
>
>
>
>
>
>
>
>
>
>
> Steve Lewin <Steve.Lewin@ICL.COM> on 10/20/2000 08:45:00 AM
>
> Please respond to pic microcontroller discussion list
<PICLIST@MITVMA.MIT.EDU>
>
>
>
>
>
>
>
>
>  To:      PICLIST@MITVMA.MIT.EDU
>
>  cc:      (bcc: Andrew Kunz/TDI_NOTES)
>
>
>
>  Subject: Re: [PIC]:RC aircraft servo controlled by 16F84
>
>
>
>
>
>
>
>
> > >Yep, remember the +5v needs LOTs of current sometimes -
> > around 100-200ma
> > depending of the force of the servo.
> >
> > Try 1000mA, even for a standard (S148) servo.
> >
> And be careful because the smaller servos sometimes take even more
current.
>
> While we're on this subject, I'm trying to build an encoder and decoder to
> emulate the training cord signals on an RC transmitter (8 channels 1-2ms
> with 4ms synch pulse). The encoder takes 4 analog input / 4 switches,
signal
> goes down 2 wires to the decoder which drives 4 servos + switches. I could
> do it with the old Signetics chips (5044 ?) or 4017s but PICs seem like
more
> fun and it's about time I learned how to use them. Has anyone done this
> before or do I have to make it all up myself ?
>
> Thanks - Steve
>
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>

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