Receiver /actuator

[poulsbobill]

Can i use a regular rx to run an actuator? I have servos but want to use in a lighter setup. Anyone know if this can be done. How to wire it?

Thanks,

Bill

[vintage1]

not really. By the time you have built an interface, its as heavy as a light servo.

1.5 and 2.5g servos are available..at sensible prices..

[poulsbobill]

Microinvent makes a rx that does both...but i want to use my old one. No idea on modding cheaply and lightly eh?

Bill

[vintage1]

Not really. I am not sure that the transmitters are even the same. You would need to replace the complete decoder section on a stock RX with a PIC and some drivers to turn a standard PPM into something like an actuator signal.
Or I guess you could hang boat/car type reversing ESC's off the channels and use those to drive the actuators.. :D :D

[Zlatko]

Bill,

Why don't you come to the Indoor Forum and search for what you are after...
There are literally dozens of designs and codes floating around.
Koichi, darkith, Bruce Abbott, Martin ( YAPP ) .. have released their own code to go into PICs, staring from 12C508 onwards .

I've converted BlueArrow and GWS receivers for actuator use ... just search ...

Cheers

[poulsbobill]

Bill,

Why don't you come to the Indoor Forum and search for what you are after...
There are literally dozens of designs and codes floating around.
Koichi, darkith, Bruce Abbott, Martin ( YAPP ) .. have released their own code to go into PICs, staring from 12C508 onwards .

I've converted BlueArrow and GWS receivers for actuator use ... just search ...

Cheers
I found your thread on converting the blue arrow and others

Thank you,

Bill

[Zlatko]

Hi Bill,

What RX do you have ( wish to convert ) ?

What size ( weigth ) models do you want to fly?
For under 20gm you could just use 120+ Ohm actuators directly wired to the PIC, for heavier , you would most likely need actuator "amplifier".
So, for lighter models all you would need is a PIC and a FET for the motor ESC.

BTW, have you seen the kits that Koichi has for sale?

Cheers

[poulsbobill]

Hi Bill,

What RX do you have ( wish to convert ) ?

What size ( weigth ) models do you want to fly?
For under 20gm you could just use 120+ Ohm actuators directly wired to the PIC, for heavier , you would most likely need actuator "amplifier".
So, for lighter models all you would need is a PIC and a FET for the motor ESC.

BTW, have you seen the kits that Koichi has for sale?

Cheers
The actuators i have built are about 150 ohm. Attach directly to which terminals on the rx (bluebird btw)? I think your thread in micro may have showed this.

Do you have the link for koichi's rx?

Bill

[Zlatko]

Hi Bill,

I haven't seen a bluebird RX, have you figured out where the PPM signal goes to the decoder and +ve & -ve ?

Koichis web site is here
http://babelfish.altavista.com/babelfish/tr?tt=url&url=http://blog.goo.ne.jp/toko0131/&lp=ja_en
click on the "Indoor Airplane World e-shop" then click on the "Infrared ray receiver".
Those RXes are meant for a IR front end , however they will accept PPM signal from the RX. The signal could be the "wrong" way ( ie negative or positive going pulses ) , so this could be a problem .... On the Blue Arrow RX there is a "comparator" just before the decoder and the pulse orientation can be "fixed" by desoldering a 0 Ohm link and soldering it onto another "empty" spot on the RX.
I use Martins YAPP code because it takes care of the "shift" automatically and always outputs the throttle channel to the ESC irespective of the TX brand.

Koichi also has some DIY stuff that could be of use:
http://babelfish.altavista.com/babelfish/tr?tt=url&url=http://blog.goo.ne.jp/toko0131/&lp=ja_en

If you can take some photos of your RX , start a thread in the Indoor forum. I'll join in with the help I can.

Cheers

[poulsbobill]

Hi Bill,

I haven't seen a bluebird RX, have you figured out where the PPM signal goes to the decoder and +ve & -ve ?

Koichis web site is here
http://babelfish.altavista.com/babelfish/tr?tt=url&url=http://blog.goo.ne.jp/toko0131/&lp=ja_en
click on the "Indoor Airplane World e-shop" then click on the "Infrared ray receiver".
Those RXes are meant for a IR front end , however they will accept PPM signal from the RX. The signal could be the "wrong" way ( ie negative or positive going pulses ) , so this could be a problem .... On the Blue Arrow RX there is a "comparator" just before the decoder and the pulse orientation can be "fixed" by desoldering a 0 Ohm link and soldering it onto another "empty" spot on the RX.
I use Martins YAPP code because it takes care of the "shift" automatically and always outputs the throttle channel to the ESC irespective of the TX brand.

Koichi also has some DIY stuff that could be of use:
http://babelfish.altavista.com/babelfish/tr?tt=url&url=http://blog.goo.ne.jp/toko0131/&lp=ja_en

If you can take some photos of your RX , start a thread in the Indoor forum. I'll join in with the help I can.

Cheers
I meant blue arrow. Also my actuators are more along the lines of 25 ohm ie 150 mah. Sorry

Bill