I need some help, i've been trying to figure this out all night but I cant seem to come up with simple solution. I'm putting 4 motors in my tank, 2 driving the treads, and 2 driving propellers for water driving. and I want to make it so a servo switches power in-between the sets of motors so there not both running all the time. heres a diagram. anyone know how to do this?

you could try using a switch like this
http://www.allelectronics.com/cgi-bi..._BUSHING_.html

it is a "Dual Position-Dual Throw.....On/On"
It has a long enough stem that you could rig to a servo somehow.
Hope diagram helps(positive wires are hooked to switch)

any way to wire it up on some of these? [link=http://www.allelectronics.com/cgi-bin/item/SMS-227/700/S.P.D.T._MINI-SNAP-ACTION_SWITCH_.html]http://www.allelectronics.com/cgi-bin/item/SMS-227/700/S.P.D.T._MINI-SNAP-ACTION_SWITCH_.html[/link] ive got a bunch of these laying around right here

yup, just use two of those swithes and use a servo so that when at one extreme....activates one switch, when at other extreme....activates second switch.
Also, I think you would need a servo that would stay in place once activated....like a two position servo( I think they make those)

Also, your motor "polarity" may be different than what I have drawn...not a big deal though
Im done

sweet, thanks very much =)

this is the type of servo you need(read the tech notes). Kind of pricey though!!!


"A retract servo is a very specialized servo. It is non-proportional,
going 180°, "lock to lock". It is specifically made for Mechanical
Retracts to lock the gear in the up and down positions, and DOES
NOT have any means of end point adjustment and cannot be adjusted
by ATV on a transmitter. It is only able to go 180° and provide
full maximum available torque at the two end points."


http://www2.towerhobbies.com/cgi-bin...p?&I=LXH317&P=

im going to be using a 6 channel radio with toggle switches on it, dont those make the servo goes all the way when the switch is flicked?

you can set it up that way.....yes

just had time today to work on the tank and im still confused as to how to wire up these switches [link=http://www.allelectronics.com/cgi-bin/item/SMS-227/700/S.P.D.T._MINI-SNAP-ACTION_SWITCH_.html]http://www.allelectronics.com/cgi-bin/item/SMS-227/700/S.P.D.T._MINI-SNAP-ACTION_SWITCH_.html [/link]

If using two of these switches...which I think is a bad idea,because they have to be hit twice(once to turn on and then once to turn off) so good luck getting a servo to do THAT!!!!
I would use just one of the DPDT and call it a day....its either in one position or the other,thus easier to hook up to a servo.
You also might want to try a solenoid to throw the switch instead of a servo,this one is 12vdc but might work with 7.2vdc
http://www.allelectronics.com/cgi-bi...SOLENOID_.html
A basic understanding of reading schematics is also helpful......

yeah i think ill head over to radioshack and pick up a DPDT switch. and sorry i cannot read schematics very well... lol, but thanks for your help

http://www.warpig.com/paintball/tech...s/index2.shtml

this link is for airsoft guns...but may help you
Also....this