Electonic Engineers - Small (low) remote controlled electonic motor

[Umfriend]

I've thought about the car engines, but I have not found any yet where the motor and receiver would fit within 1.6cm of height...

Had not thought about IR controller power, I assumed on 4x1.5V AAA batteries, it would last for quite a while..?!

[Kurt]

Originally posted by rylan
Realistically a small servo or maybe stepper motor that is usable with reverse polarity is what you'd want, and I believe thats what most receivers with automatic volume knobs use. A standard motor will turn too much too quickly and be hard to control., and you'll need quite a bit of gearing to reduce the speed down enough. Other issue is for the IR microcontroler it'll need to be continuously powered, so your batteries won't last too long.

he could simply lower the voltage of the motor...

[Greebe]

One of the cheapest ways to go... (most anything else would be costly and complex)

http://www.oatleyelectronics.com/kits/k167.html

[az]

Greebe, that's a diital volume controller, yes? So he'd need to put this either inbetween source and amp, or preamp and opamp - I don't know if that's what he wants (but the site looks interesting).

AZ

[Tjalfe]

Originally posted by Kurt
he could simply lower the voltage of the motor...

as a method of controlling speed... yes, but the torque of the motor pretty much dissapears then, not being able to turn anything other than itself.

[Umfriend]

Shit, wish I knew someone who liked a challenge and developed and build to spec......

Thanks guys, really, all of you have been very helpfull, but it just falls on infertile soil (me).....

Apparantly there is so much one needs to know before one can even get started....it somehow reminds me of how I tried to explain asset-backed securities to a biologist........ and he did not even want to accomplish anything with the knowledge..... SHITE!

[Greebe]

You could go through using a motorized volume control... with it's added electrical noise, complication, et al or add the circuit I linked just in front of or after the attenuator potentiometer (volume control). Once the level is preset on the knob you are good to go with a lot less mess, frustration and expense.

This way is more cut and paste than anything.

[gt40]

My Yamaha amp has one of these motorized volume controls
I love it, it's so easy to just walk up and crank it up or down quickly by hand instead of using the remote.
especially when you can't find the remote

[Greebe]

especially when you can't find the remote

Biggest complaint I've have with the other half... for over a decade now it was... think I've finally gotten through in the last month.

My old Yamaha and a Technics also had one... but to implement is vastly more difficult.

First there is the motor, drive electronics, noise suppression, gearing and clutch to connect to the knob... then there is the remote issues to be tackled. If you were hardcore into all the 'geeky' items on this list and had vastly more money than my earlier suggestion then I'd say go for it.

But time and money spent would in most cases prove buying anew would be the better choice.

[spadnos]

Well - I found some small and cheap motors at <A href="http://www.allelectronics.com/cgi-bin/category.cgi?category=400&item=DCM-166&type=store">All Electronics</a>. It's still a job to get the remote control aspect working.

Good luck.

- Steve

[Greebe]

Originally posted by spadnos
Well - I found some small and cheap motors at <A href="http://www.allelectronics.com/cgi-bin/category.cgi?category=400&item=DCM-166&type=store">All Electronics</a>. It's still a job to get the remote control aspect working.

Good luck.

- Steve

Too bad it's rpm rating is vastly too high for the need


Try this if you still wish to make it motorized.

more...

http://users.breathe.com/williamshart/accessories.htm

http://www.rentron.com/project03.htm

[Tjalfe]

"No load rating: 15,800 RPM @ 2.4 V"
a tad fast for controlling a volume control.. no?
find an old dot matrix printer and take out the stepper motor controlling the print head. it should either be free to find such, or really damn cheap

[gt40]

any old hard drive has stepper motors that control the heads.
these are generally very small and can be driven with a simple circuit.
just need to get past the remote control stuff.
those kits from velleman are actually very reasonably priced ($30-100)

[Tjalfe]

or even an old 5.25" floppy has some nice stepper motors

[Marshmallowman]

what about these

http://www.altronics.com.au/cat.asp?cat=2&grp=13&id=R2000

I will try to find the proper motorised volume control