RCCrawler Forums

newth · 11-28-2005, 06:07 AM

i want to build up a voltage regulator, as opposed to running a reciever pack.
problem is i have no idea on the current draw.
any1 know how much current 2 x 1/4 scale servos & the reciever will take roughly?
1 can't rememeber the exact servo number, they're hitec 1s with quite a high torque.

any1 help?

JasonInAugusta · 11-28-2005, 06:13 AM

You can look at the specs on towerhobbies.com

JohnRobHolmes · 11-28-2005, 07:19 AM

I would give yourself at least 5 amps continuous.

newth · 11-28-2005, 09:09 AM

Quote:

Originally Posted by JasonInAugusta

You can look at the specs on towerhobbies.com

good idea. i'll give that a go when i get home
thanks.

newth · 11-28-2005, 09:11 AM

Quote:

Originally Posted by johnrobholmes

I would give yourself at least 5 amps continuous.

5 AMPS?!?!?!

hmmm, thats a lot. most of my regs are only rated at about 1 amp.

still, i suppose 5 will be lighter than a batt pack, & less bother.
i'll see what the spec says

newth · 11-28-2005, 01:28 PM

ok, got no where there.
sent hitec a email to see if they can help.
all their site says about the servo, 'New in 2005'.
Thanks hitec, that helps a lot. lol

any1 else running regulators?
buy it or made it?

SPEED_RACER · 11-28-2005, 02:05 PM

do a search.there is a post on how to make a regultaor.i have the link saved at home but i'm at work .

newth · 11-28-2005, 03:07 PM

just tried searching again, got no results last time! (probably my spelling.)

ok, loads of info, as always on here, but why do people seem to be using fixed regs then modifing them? why not just use a higher current rated variable reg since its being set with resistors anyway?

& of course, if every1 is running 7805s with a 1 amp rating, how many are u all using on ur truck?

JohnRobHolmes · 11-28-2005, 08:04 PM

I use the MPI regs with speed controllers that dont have enough juice. http://www.maxxprod.com/mpi/mpi-21.html The six volt or variable versions work well.

You could also straight wire your batt into your electrics, but its risky.

newth · 11-29-2005, 09:52 AM

great stuff.

so do u find that 1 unit rated at 10 amps is enough for 2 BIG servos?

newth · 11-29-2005, 09:59 AM

got a reply from hitec today....

Hello Newth,

The 5745 max current draw is 4800 milliamps.

Thank you,

oh. i'm running 2 of these!
guess i need 10 amps of regulators!

SPEED_RACER · 11-29-2005, 01:02 PM

here's the link to make your own
HOW to make a 6 volt voltage regulator!

newth · 11-29-2005, 01:34 PM

great stuff. thanks. i found that early after u nudged me in the right direction.
i've ordered some LM1084s. not used them b4, rated at 5 amps though, normally use the 1 amp version LM317T. i'll see how they go. cost me about 1 dollar each in ur money! gonna try 3 together to get me 15 amps if i need it.

chafey · 11-29-2005, 03:13 PM

Quote:

Originally Posted by newth

got a reply from hitec today....

Hello Newth,

The 5745 max current draw is 4800 milliamps.

Thank you,

oh. i'm running 2 of these!
guess i need 10 amps of regulators!

you would probably do better to run them straight off your battery. do a search and youll probably find it.

newth · 11-29-2005, 03:26 PM

i spoke to hitec about doing that in the past. he guy there said they'd run, but only for a limited time. 6 - 6.5volt was the max ie, 5 x 1.2 cells when charged.

xjnation · 11-29-2005, 03:37 PM

I was messing around on rc plane boards and came across a requlator that was rated at 5 amps, 6v. Seeing as they have to use 4-6 servos on a regular basis, that might be worth looking into. I'm sure they would be the ones to talk to about a high amp regulator.

Ace · 11-29-2005, 04:08 PM

I'll second running it straight to the battery.

I've done it for years without problems.

Them big assed 1/4 scale servos really wizz at 6cell voltage!

newth · 11-30-2005, 12:56 PM

i did consider doing that for a while, but i'm running on 7 cells again now, so gonna have to regulate.

11-28-2005, 06:07 AM	#1
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	Servo current draw i want to build up a voltage regulator, as opposed to running a reciever pack. problem is i have no idea on the current draw. any1 know how much current 2 x 1/4 scale servos & the reciever will take roughly? 1 can't rememeber the exact servo number, they're hitec 1s with quite a high torque. any1 help?

11-28-2005, 06:13 AM	#2
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	You can look at the specs on towerhobbies.com

11-28-2005, 07:19 AM	#3
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I would give yourself at least 5 amps continuous.

11-28-2005, 01:28 PM	#6
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	ok, got no where there. sent hitec a email to see if they can help. all their site says about the servo, 'New in 2005'. Thanks hitec, that helps a lot. lol any1 else running regulators? buy it or made it?

11-28-2005, 02:05 PM	#7
SPEED_RACER Quarry Creeper Join Date: Nov 2004 Location: MANVILLE Posts: 413	do a search.there is a post on how to make a regultaor.i have the link saved at home but i'm at work .

11-28-2005, 03:07 PM	#8
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	just tried searching again, got no results last time! (probably my spelling.) ok, loads of info, as always on here, but why do people seem to be using fixed regs then modifing them? why not just use a higher current rated variable reg since its being set with resistors anyway? & of course, if every1 is running 7805s with a 1 amp rating, how many are u all using on ur truck?

11-28-2005, 08:04 PM	#9
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I use the MPI regs with speed controllers that dont have enough juice. http://www.maxxprod.com/mpi/mpi-21.html The six volt or variable versions work well. You could also straight wire your batt into your electrics, but its risky.

11-29-2005, 09:52 AM	#10
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	great stuff. so do u find that 1 unit rated at 10 amps is enough for 2 BIG servos?

11-29-2005, 09:59 AM	#11
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	got a reply from hitec today.... Hello Newth, The 5745 max current draw is 4800 milliamps. Thank you, oh. i'm running 2 of these! guess i need 10 amps of regulators!

11-29-2005, 01:02 PM	#12
SPEED_RACER Quarry Creeper Join Date: Nov 2004 Location: MANVILLE Posts: 413	here's the link to make your own HOW to make a 6 volt voltage regulator!

11-29-2005, 01:34 PM	#13
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	great stuff. thanks. i found that early after u nudged me in the right direction. i've ordered some LM1084s. not used them b4, rated at 5 amps though, normally use the 1 amp version LM317T. i'll see how they go. cost me about 1 dollar each in ur money! gonna try 3 together to get me 15 amps if i need it.

Sponsored Links

11-29-2005, 03:26 PM	#15
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	i spoke to hitec about doing that in the past. he guy there said they'd run, but only for a limited time. 6 - 6.5volt was the max ie, 5 x 1.2 cells when charged.

11-29-2005, 03:37 PM	#16
xjnation Rock Stacker Join Date: Oct 2005 Location: Springfield Posts: 50	I was messing around on rc plane boards and came across a requlator that was rated at 5 amps, 6v. Seeing as they have to use 4-6 servos on a regular basis, that might be worth looking into. I'm sure they would be the ones to talk to about a high amp regulator.

11-29-2005, 04:08 PM	#17
Ace Rock Crawler Join Date: Apr 2004 Location: Longmont, CO Posts: 901	I'll second running it straight to the battery. I've done it for years without problems. Them big assed 1/4 scale servos really wizz at 6cell voltage!

11-30-2005, 12:56 PM	#18
newth Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK Posts: 87	i did consider doing that for a while, but i'm running on 7 cells again now, so gonna have to regulate.

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