Micron 'Elf' single-channel proportional set
- Phil_G
- Posts: 607
- Joined: 15 Feb 2018, 23:32
- Contact:
Micron 'Elf' single-channel proportional set
The Micron 'Elf' is quite an unusual set in that it was a late arrival on the S/C scene and consequently Micron only sold about a hundred units. It was sold as a kit for home construction, as can be seen from the advertisement.
This one was kindly given to me by Phill Wigley and had long ago been hastily refitted with the board from an Acoms 2ch car set, the original Micron electronics lost. From that aspect it was ideal for conversion to 2.4g, which I've done using a Frsky DFT transmitter module (in V8 mode) and a V8R4 receiver which is lost inside the original Elf receiver case!
The encoder is the Digimac 1+1 with the throttle button left unconnected.
This is a true recreation of the original set which was strictly single-channel, it drove one proportional servo with no option to expand. The servo would typically be used for rudder in a model plane or boat.
Uniquely the transmitter didnt send PPM but instead was directly modulated by a standard PWM servo signal. In effect, it was like a servo tester via an RF link. The AM, single-conversion 27mhz receiver had no decoder as there was only one pulse per frame, and hence nothing to decode, its output a standard 1-2ms servo pulse.
After almost 45 years this set is again destined for the flying field, probably in a Veron Impala rudder-only slope soarer. It would also be ideal for a small diesel or Babe-Bee powered S/C model. Far better it spends the rest of its days 'out there' than on a collectors shelf!
Cheers
Phil
. . .
This one was kindly given to me by Phill Wigley and had long ago been hastily refitted with the board from an Acoms 2ch car set, the original Micron electronics lost. From that aspect it was ideal for conversion to 2.4g, which I've done using a Frsky DFT transmitter module (in V8 mode) and a V8R4 receiver which is lost inside the original Elf receiver case!
The encoder is the Digimac 1+1 with the throttle button left unconnected.
This is a true recreation of the original set which was strictly single-channel, it drove one proportional servo with no option to expand. The servo would typically be used for rudder in a model plane or boat.
Uniquely the transmitter didnt send PPM but instead was directly modulated by a standard PWM servo signal. In effect, it was like a servo tester via an RF link. The AM, single-conversion 27mhz receiver had no decoder as there was only one pulse per frame, and hence nothing to decode, its output a standard 1-2ms servo pulse.
After almost 45 years this set is again destined for the flying field, probably in a Veron Impala rudder-only slope soarer. It would also be ideal for a small diesel or Babe-Bee powered S/C model. Far better it spends the rest of its days 'out there' than on a collectors shelf!
Cheers
Phil
. . .
- RON
- Site Admin
- Posts: 632
- Joined: 12 Jun 2017, 15:09
- Location: Stokesley North Yorkshire
Re: Micron 'Elf' single-channel proportional set
Hey Phil,
If they are only £17.95 I'll take one...or twenty
Ron
If they are only £17.95 I'll take one...or twenty
Ron
G0MBV Class A Radio Amateur, North Yorkshire
- tiptipflyer
- Posts: 393
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: Micron 'Elf' single-channel proportional set
My old Micron ELF replica was upgraded by two black sides with the typical four holes for more accuracy. I think it looks much better now.
An even better replica with a 3D-printed case is 50% finished. Frank
An even better replica with a 3D-printed case is 50% finished. Frank
- RON
- Site Admin
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- Joined: 12 Jun 2017, 15:09
- Location: Stokesley North Yorkshire
Re: Micron 'Elf' single-channel proportional set
Brilliant Frank.
It makes a big difference having the 4 holes on the sides.
Will you be sharing the print files on the forum?
I think it would be a popular project.
The elf is on my list of to-do’s. I just need to find a suitable stick unit first.
Ron.
It makes a big difference having the 4 holes on the sides.
Will you be sharing the print files on the forum?
I think it would be a popular project.
The elf is on my list of to-do’s. I just need to find a suitable stick unit first.
Ron.
G0MBV Class A Radio Amateur, North Yorkshire
- tiptipflyer
- Posts: 393
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: Micron 'Elf' single-channel proportional set
Of course Ron, if it is of interest to somebody, I will post it.
Here are the OpenSCAD- and stl- files for the side panels above. The print files for the next ELF replica will be posted, when the transmitter is finished and I know, that everything will fit properly together. Frank
Here are the OpenSCAD- and stl- files for the side panels above. The print files for the next ELF replica will be posted, when the transmitter is finished and I know, that everything will fit properly together. Frank
- tiptipflyer
- Posts: 393
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: Micron 'Elf' single-channel proportional set
Another Elf replica is finished with a 3D-printed case. It has the same features as the old Elf replica plus low voltage and inactivity buzzer, and it has a changeable Futaba style HF-module.
For those, who would like to give it a try, the OpenSCAD and stl-files are available in the 3D-files section. Frank
For those, who would like to give it a try, the OpenSCAD and stl-files are available in the 3D-files section. Frank
- Wayne_H
- Posts: 811
- Joined: 17 Feb 2018, 05:26
- Location: Temora, NSW. Australia
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Re: Micron 'Elf' single-channel proportional set
Another top job Frank! Thanks for sharing
Does this use the ATtiny sketch you posted previously?
Does this use the ATtiny sketch you posted previously?
Cheers,
Wayne
Once a Retrobate, always a Retrobate............
Wayne
Once a Retrobate, always a Retrobate............
- tiptipflyer
- Posts: 393
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: Micron 'Elf' single-channel proportional set
Thanks Wayne,
yes, it´s the same sketch.
Frank
yes, it´s the same sketch.
Frank
- RON
- Site Admin
- Posts: 632
- Joined: 12 Jun 2017, 15:09
- Location: Stokesley North Yorkshire
Re: Micron 'Elf' single-channel proportional set
As usual Frank,
A very nice job on the Elf.
Looking forward to the flight report
Ron.
A very nice job on the Elf.
Looking forward to the flight report
Ron.
G0MBV Class A Radio Amateur, North Yorkshire
- tiptipflyer
- Posts: 393
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: Micron 'Elf' single-channel proportional set
Thanks Ron,
I will be on vacation the next two and a half weeks, so test-flight will be after that.
Frank
I will be on vacation the next two and a half weeks, so test-flight will be after that.
Frank