i killed my msc from a clod last week - put 28.8v thru it, lol - so i was hoping for something that could take the 28.8v - i had an idea to use the circuitry from a servo to control a relay - the relay would actually be sending the power to the motor - but i cant figure out getting the relay wired up to a rc reciever.
Idea for a project?
- Thread starter S_C_I_P_I_O79
- Start date
Ok I'm a lil pissed.
Turns out the jackweed who I got the 4x4 buggy from on ebay has dissappeared it seems so I am filing with paypal to get my loot back (a real pain if you know about it.) So I am delayed on this till I find another unit. Jerk anyways.
tejotasbd What motor are you tunning that power to? Unless its desgined to take at least half that it will not work well and most likely just let the smoke out. Connecting a relay to a reciever? Easy. Take any old servo and use it to operate a small switch that controls power to the relay. But even easyier is to get a set of contact points that can handle the power you want and make the servos control arm open and close them. What are you using this on? Putting that much voltage straigh to a motor and drivetrain will be super hard on it. Going with the New Traxxas EVX2 and 14-16 volts thru hotrod motrs might be a better thing to look at. Depending on what you are trying to do. If you are dead set on 28 volts or close its gonna cost yah a lil but look into high end rechargeable power drills. Some of them are way way up there (I have seen 24 volters. I dunno about 28) and they have triggers that you can control the speed. Put a weaker spring on the trigger ( or none at all) and have the servo connected to the trigger. With another servo connected to the reverse switch of the drill you can even have reverse. And control it. These speed controsl in these drills are tough as all get out and all but the chinese cheapies have thermal protection.) Bill
Turns out the jackweed who I got the 4x4 buggy from on ebay has dissappeared it seems so I am filing with paypal to get my loot back (a real pain if you know about it.) So I am delayed on this till I find another unit. Jerk anyways.
tejotasbd What motor are you tunning that power to? Unless its desgined to take at least half that it will not work well and most likely just let the smoke out. Connecting a relay to a reciever? Easy. Take any old servo and use it to operate a small switch that controls power to the relay. But even easyier is to get a set of contact points that can handle the power you want and make the servos control arm open and close them. What are you using this on? Putting that much voltage straigh to a motor and drivetrain will be super hard on it. Going with the New Traxxas EVX2 and 14-16 volts thru hotrod motrs might be a better thing to look at. Depending on what you are trying to do. If you are dead set on 28 volts or close its gonna cost yah a lil but look into high end rechargeable power drills. Some of them are way way up there (I have seen 24 volters. I dunno about 28) and they have triggers that you can control the speed. Put a weaker spring on the trigger ( or none at all) and have the servo connected to the trigger. With another servo connected to the reverse switch of the drill you can even have reverse. And control it. These speed controsl in these drills are tough as all get out and all but the chinese cheapies have thermal protection.) Bill
man, that stinks that the guy has disappeared - i had that happen to me, but i only lost 25bucks - hope you get your money back.
the motor i sent the 28.8v to is a 24v motor from a razor electric scooter http://www.myrcmt.com/bd/showthread.php?t=5114
i really like your cordless powerdrill idea - thanks
before the esc died, i had removed the resistors, so it was full throttle only, and i really needed to slow down before trying to steer the thing, lol, so i cant go back to something without some sort of throttle increments.
the motor i sent the 28.8v to is a 24v motor from a razor electric scooter http://www.myrcmt.com/bd/showthread.php?t=5114
i really like your cordless powerdrill idea - thanks
before the esc died, i had removed the resistors, so it was full throttle only, and i really needed to slow down before trying to steer the thing, lol, so i cant go back to something without some sort of throttle increments.Do yah still got it??
Ok I seen that. Neat for something different thats for sure. Any chance you still have the speed control that came with the scooter? If so what kind was it? We might be able to get it to work for yah. If you happen to have it tell anything you do know about it. Like how it operates and anything else you can. (I have seen these little scooters with twists on the bars and little switches you press with the foot.) Bill
Ok I seen that. Neat for something different thats for sure. Any chance you still have the speed control that came with the scooter? If so what kind was it? We might be able to get it to work for yah. If you happen to have it tell anything you do know about it. Like how it operates and anything else you can. (I have seen these little scooters with twists on the bars and little switches you press with the foot.) Bill
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i still have the esc from the scooter, and it used a throttle "twist grip) - so im thinking that the twist grip was basicly just a potentiometer/variable resistor - my plan a while back was to get an rc servo, remove the motor from the servo, and remove the pot/variable resistor from the servo, then use the 2 wires that were going to the motor in the servo to instead go to those wires on the "twist grip" - but the ciruitry in the rc servo needs to see 2 identical sets of resistance ( one on each of the 2 sides of the the potentiometer - ottherwise the power output from those wires never stops - it will just keep sending voltage to where the servo's motor was. perhaps varying that voltage from that servo controller board will signal the razor esc.
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Say what!
The only issue with wiring it straight in like that is if the supply voltages and resistance loads are even close to compatible. Chances are much better they are not than they are. lol You do like to tinker. I would look at the scooters twist grip and see if you cannot (prolley easy to do) figure out what the twist grip moves and see about making a normal servo move it. Then you got a speed control you know can take the abuse (and more in that light thing compared to what it used to push.) and any good servo will move whatever the twist did even if you need to take a spring out of the twist system or put a much lighter one in. Bill
The only issue with wiring it straight in like that is if the supply voltages and resistance loads are even close to compatible. Chances are much better they are not than they are. lol You do like to tinker. I would look at the scooters twist grip and see if you cannot (prolley easy to do) figure out what the twist grip moves and see about making a normal servo move it. Then you got a speed control you know can take the abuse (and more in that light thing compared to what it used to push.) and any good servo will move whatever the twist did even if you need to take a spring out of the twist system or put a much lighter one in. Bill