Log in

View Full Version : servo hot-wire

Medders
16-02-2007, 08:34 PM
Back in the good ol days, I seem to remember that I made my "average" servo perform much better by wiring the red lead straight into the battery plug.

I also have a hazy memory of having to solder something into the connection to make it work properly.

Does this make sense to anyone? Is this still done or am I talking shite?
PaulRotheram
16-02-2007, 08:41 PM
you need a choke diode, this will prevent electric impulses damaging the servo.

doing this mod will shorten the life of you servo however, the motor works harder as more voltage is put through it.
Medders
16-02-2007, 08:54 PM
you need a choke diode, this will prevent electric impulses damaging the servo.

doing this mod will shorten the life of you servo however, the motor works harder as more voltage is put through it.


cheers mate

not worried about the "life" issue. Any idea what spec diode i need, i assume i need to get my arse down to maplin electronics or does your average model shop still stock this type of thing?
PaulRotheram
16-02-2007, 09:08 PM
your model shop should have these in, they are still used today on all 7.2 servos.
philly
16-02-2007, 09:40 PM
The 'choke' you need is actually a 4.7uH resistor. Model shops have them for a couple of quid or Maplins can give you about 10 for the same 2 quid!;)
Northy
16-02-2007, 10:52 PM
Guys, it's not a diode or a resistor, it's an inductor! :cool: :cool:

Cheers,

G BEng (Hons) Electronic Engineering
jimarea51
17-02-2007, 09:13 AM
Northy,

I'm sure you'll explain in more detail......:confused:

Jimarea51
Amb, K.N.O.B. Bacon & Egg...
DCM
17-02-2007, 09:27 AM
Guys, it's not a diode or a resistor, it's an inductor! :cool: :cool:

Cheers,

G BEng (Hons) Electronic Engineering

glad you said it, was just reading the thread going gaaaaaargh, it isn't a diode, then, GAAAAAAARGH it isn't a resistor.

The smaller ones look like a resistor but they are most definately not.

4.7uH (thats micro henries)
Medders
17-02-2007, 10:06 AM
I also have a hazy memory of having to solder something into the connection to make it work properly.
[/quote]


All Gobbledegook to me. I'll stick with my original description :confused:
Richard Lowe
17-02-2007, 11:42 AM
An inductor a a coil basically which blocks AC above a certain frequency depending on the value of the inductor.
Northy
17-02-2007, 11:47 AM
And does other stuff too Rich ;)

G
Richard Lowe
17-02-2007, 11:50 AM
Well yeah but we're on 'it's a resistor' level :)