Doug some weird things happened when I was editing previous posts and they got lost (signing out before posting the changes) in the land of the electrons. So I created new posts then realized the two got un-lost, hence the ".".
Lew
Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
Doug some weird things happened when I was editing previous posts and they got lost (signing out before posting the changes) in the land of the electrons. So I created new posts then realized the two got un-lost, hence the ".".
Lew
Hi BobbyN,
Excellent diagrams👍
But! As recently mentioned in another thread:
one other recommendation for twin or more motors; individual fuses in the red power lines from the motor battery to each ESC, or better in the + line from each ESC to it's motor.
Helps to prevent burnouts in motor and/or ESC if the propeller snags and stalls on rubbish in the pond. Fuse value should be a few amps less than the stall current value of the motor.
Then if only one prop is stalled you can still get the boat home on the remaining shaft.😀
Cheers, Doug😎
Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
Hi BobbyN,
Excellent diagrams👍
But! As recently mentioned in another thread:
one other recommendation for twin or more motors; individual fuses in the red power lines from the motor battery to each ESC, or better in the + line from each ESC to it's motor.
Helps to prevent burnouts in motor and/or ESC if the propeller snags and stalls on rubbish in the pond. Fuse value should be a few amps less than the stall current value of the motor.
Then if only one prop is stalled you can still get the boat home on the remaining shaft.😀
Cheers, Doug😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Re: increasing current draw by hacking the red wires might be possible. I'm not sure about the signal wire operating another device's red/black wires would work. (I was trying to stick with the everyday common setups for ESC's).
However, I did find this interesting picture of the "castle 2.0 bec wiring" circuit (see photo) on the forum shown (link in picture). It looks like the power outputs from the battery 8.4V go to the ESC and 6V go to the receiver. Now the 8.4V output of the ESC goes to the add on BEC (not the one in the ESC). That might be labeled incorrect and should be 6V (???).
My other concern is the commonality between the two BEC 6V red/black outputs. Sure, they both come from the same battery but through different circuits.
I'm not sure the fan in connected in series between the 2nd BEC and the servo. Not sure if or where the signal/programming port is connected.
I have to defer this concept to someone with more electronics design experience🙄. I'm (was) only an electro-mechanical packaging designer.)
Has anyone else here tied this or have any theories? I think this circuit would work well for someone needing more controllable/adjustable current for a large servo or crane.
Lew (retired 27 years)
Florida 😎, USA
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Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
Re: increasing current draw by hacking the red wires might be possible. I'm not sure about the signal wire operating another device's red/black wires would work. (I was trying to stick with the everyday common setups for ESC's).
However, I did find this interesting picture of the "castle 2.0 bec wiring" circuit (see photo) on the forum shown (link in picture). It looks like the power outputs from the battery 8.4V go to the ESC and 6V go to the receiver. Now the 8.4V output of the ESC goes to the add on BEC (not the one in the ESC). That might be labeled incorrect and should be 6V (???).
My other concern is the commonality between the two BEC 6V red/black outputs. Sure, they both come from the same battery but through different circuits.
I'm not sure the fan in connected in series between the 2nd BEC and the servo. Not sure if or where the signal/programming port is connected.
I have to defer this concept to someone with more electronics design experience🙄. I'm (was) only an electro-mechanical packaging designer.)
Has anyone else here tied this or have any theories? I think this circuit would work well for someone needing more controllable/adjustable current for a large servo or crane.
Hi All
Thought I would make a contribution to this topic. Attached are two basic circuit diagrams that our Association uses. The first one shows a single battery powering a single screw boat using an ESC with a BEC. The secong diagram shows a twin screw boat powered by two batteries in parallel. We use channel 4 because we have an upgrade to the flysky i6 which creates a twin throttle.
Hope this contributes.
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Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
Hi All
Thought I would make a contribution to this topic. Attached are two basic circuit diagrams that our Association uses. The first one shows a single battery powering a single screw boat using an ESC with a BEC. The secong diagram shows a twin screw boat powered by two batteries in parallel. We use channel 4 because we have an upgrade to the flysky i6 which creates a twin throttle.
If you are using any form of high power servos, you should use a BEC that is capable of delivering the sum of the current required by them under load. The negative wires of the BEC and the ESC will be treated as common and therefore connected. The receiver can be powered by either the BEC or the ESC red wire but often the voltage required by high power servos is more than the receiver can handle, in that case use the positive from the ESC and use the BEC positive only for the servos. The control of the servos is via the signal lead, usually white, from the receiver. The return circuit is provided by the common negative leads. In large model aircraft electronic devices are used that provide for two batteries and two receivers and in some cases dual servos, the reason for this is fail safe and redundancy. If this is confusing, let me know and I will draw up a schematic.
🤔
Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
If you are using any form of high power servos, you should use a BEC that is capable of delivering the sum of the current required by them under load. The negative wires of the BEC and the ESC will be treated as common and therefore connected. The receiver can be powered by either the BEC or the ESC red wire but often the voltage required by high power servos is more than the receiver can handle, in that case use the positive from the ESC and use the BEC positive only for the servos. The control of the servos is via the signal lead, usually white, from the receiver. The return circuit is provided by the common negative leads. In large model aircraft electronic devices are used that provide for two batteries and two receivers and in some cases dual servos, the reason for this is fail safe and redundancy. If this is confusing, let me know and I will draw up a schematic.
🤔
I would add that if the current draw of all items powered by the receiver such as motors, rudder servos, sound modules, lights, etc exceed the current output of the BEC an external battery should be attached to the receiver at the battery connection & the red wire from the esc disconnected. Particularly true if your drives are Schottels. The degrees of arc the drives can traverse create large current draws due to the turning force required.
Just clarifying my thoughts a bit.
Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
I would add that if the current draw of all items powered by the receiver such as motors, rudder servos, sound modules, lights, etc exceed the current output of the BEC an external battery should be attached to the receiver at the battery connection & the red wire from the esc disconnected. Particularly true if your drives are Schottels. The degrees of arc the drives can traverse create large current draws due to the turning force required.
The topic of how to connect an ESC with a BEC to batteries, motors, receivers, and the use of separate batteries for the receiver is probably overdue. This question comes up often, probably at the top of the list of subjects on this forum.
I'm sure there will be a variety of opinions, so let's see where it goes from here!
To begin with I am pointing to this subject as being a simple, low cost ESC that is very common with RC model builders. That is an ESC the has two wires (inputs) that are connected to the battery, two wires (outputs) that are connected to the motor(s) power switch (sometimes) and a three wire control (input) that also CAN supply power to the receiver.
The most common thing (an a little confusing) is the red wire issue. When everything is connected and turned on all the red wires on the receiver channel connections are "hot", whether to the servo, ESC, or other powered device, they are all "HOT". People might be confused with the red wire is only energized when you move the servo. NO. What moves the servo (or other device) is the signal wire which tells the device to move.
So that is the answer to why we don't supply two different positive power sources to the transmitter. If you use a receiver battery all the red wires are "hot". (Fig. 2) If you use the BEC in the ESC with no receiver battery all the red wires are hot.
You don't use the power from the ESC if you use the receiver battery. Notice in Fig, 2 the ESC's red wire is cut (or connection removed).
If you have multiple ESC's and no receiver battery, then cut the red wire on all but one of the ESC.
The red wire in the ESC is simply a tap (BEC circuit) to help eliminate a battery for the receiver. If you are using a receiver battery or another ESC that is connected to the receiver the ESC with the removed red wire connection will get its own power from that ESC internally.
Remember: Only one power source is connected to the receiver. If you try connecting otherwise, it could get expensive.
Advantage of no receiver battery: Extra weight, charging inconvenience, etc. I see no advantage to this extra battery with the exception where a boat also has a sail and the ESC is used for an auxiliary motor.
I hope this clears things up a little.
Lew
Clearwater, 😎FL, USA
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Electronic Speed Circuit (ESC) with Battery Eliminator Circuit
The topic of how to connect an ESC with a BEC to batteries, motors, receivers, and the use of separate batteries for the receiver is probably overdue. This question comes up often, probably at the top of the list of subjects on this forum.
I'm sure there will be a variety of opinions, so let's see where it goes from here!
To begin with I am pointing to this subject as being a simple, low cost ESC that is very common with RC model builders. That is an ESC the has two wires (inputs) that are connected to the battery, two wires (outputs) that are connected to the motor(s) power switch (sometimes) and a three wire control (input) that also CAN supply power to the receiver.
The most common thing (an a little confusing) is the red wire issue. When everything is connected and turned on all the red wires on the receiver channel connections are "hot", whether to the servo, ESC, or other powered device, they are all "HOT". People might be confused with the red wire is only energized when you move the servo. NO. What moves the servo (or other device) is the signal wire which tells the device to move.
So that is the answer to why we don't supply two different positive power sources to the transmitter. If you use a receiver battery all the red wires are "hot". (Fig. 2) If you use the BEC in the ESC with no receiver battery all the red wires are hot.
You don't use the power from the ESC if you use the receiver battery. Notice in Fig, 2 the ESC's red wire is cut (or connection removed).
If you have multiple ESC's and no receiver battery, then cut the red wire on all but one of the ESC.
The red wire in the ESC is simply a tap (BEC circuit) to help eliminate a battery for the receiver. If you are using a receiver battery or another ESC that is connected to the receiver the ESC with the removed red wire connection will get its own power from that ESC internally.
Remember: Only one power source is connected to the receiver. If you try connecting otherwise, it could get expensive.
Advantage of no receiver battery: Extra weight, charging inconvenience, etc. I see no advantage to this extra battery with the exception where a boat also has a sail and the ESC is used for an auxiliary motor.
