Robert: As hover1 said, it is up to 8 channels in and up to 8 channels out.
A question for the channels and the power connection...
I am presuming to connect all the center pins on the input channels together and to 5V.
What about the output center pins ?? Should I connect together ?? The ESC can provide power to these so I would have a conflict (all ESC's may generate 5V and so would be supplying in parallel) and this is bad practice. Do I just provide the first one, or not at all ??? I didn't really want to provide links for each as well as it adds another 0.25" to the pcb, but then again maybe I should ???
Next problem is I have noticed that the SCP1000 on the www.vti.fi website shows this part as obsolete. I have not found any other part with the accuracy of this pressure sensor. I was hoping this would be a cheaper and simpler way to detect the height than requiring an ultrasonic sensor as well as a less accurate BMP085. Any suggestions ???
Postedit: I have been rechecking the BMP085 Pressure Sensor and it may in fact have enough sensativity for what we require. I ordered one.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
I didn't know that the ESC generated 5v at the three pin connector, I assumed this was supplied by the transmitting device, (receiver for RC devices). Is not the ESC power isolated from the control lines?
The pressure sensor would not be useful in determining the absolute height unless the surface you are flying over is flat and before take off you took a baseline pressure reading. It is useful in determining relative movement in the Z plane(i.e. altitude changes). It could be used in conjunction with a z axis accelerometer. I think the pressure sensor is used to determine Z axis motion along with the Z axis accelerometer instead of using the GPS since GPS in inaccurate especially for altitude and has a low refresh rate. Actually the pressure sensor may be all you need to determine relative Z axis motion depending on how accurate you wish to be and how fast the sensor responds.
For true terrain following or the actual height of the copter above the ground would require ultrasonic, infrared, laser or vision sensors. Vision sensors (stereo vision) is beyond the scope of this project for now. Laser sensors are expensive. I am not sure how accurate infrared sensors are. So that leaves ultrasonic sensors. Initially I assume we plan on controlling the copter by RC. The gyros and accelerometers are for stablization. As we move to semiautonomous and autonomous flight we will have to consider GPS localization(flight planning, return to home, etc) and obstacle avoidance. I have thought about using the ultrasonic sensors for look ahead and terrain following.
I finished the test frame for my quad. As you can see it is built from hobby quality plywood. The lower platform is for the battery. The circuit board will be mounted on top with the RC receiver. I used the E-sky brushless outrunner motors(1000kv) with compatible ESCs(25A). The blades are 12" blades. Waiting on a few additional parts.
Good call on the parallel ESC outputs. I had not though about that as I will be using non BEC ECS's. Yes, they are over kill, but the are on sale and they will be used in other projects later on. I think you could·isolate the 8*3 connector to blocks of two to incorporate one ESC and one motor, all sharing common ground. I'll have to visit tommorow, just got back from my second going away party this week.
"Next problem is I have noticed that the SCP1000 on the www.vti.fi website shows this part as obsolete. I have not found any other part with the accuracy of this pressure sensor. I was hoping this would be a cheaper and simpler way to detect the height than requiring an ultrasonic sensor as well as a less accurate BMP085. Any suggestions ???"
Cluso99 said...
Robert: As hover1 said, it is up to 8 channels in and up to 8 channels out.
A question for the channels and the power connection...
I am presuming to connect all the center pins on the input channels together and to 5V.
What about the output center pins ?? Should I connect together ?? The ESC can provide power to these so I would have a conflict (all ESC's may generate 5V and so would be supplying in parallel) and this is bad practice. Do I just provide the first one, or not at all ??? I didn't really want to provide links for each as well as it adds another 0.25" to the pcb, but then again maybe I should ???
Next problem is I have noticed that the SCP1000 on the www.vti.fi website shows this part as obsolete. I have not found any other part with the accuracy of this pressure sensor. I was hoping this would be a cheaper and simpler way to detect the height than requiring an ultrasonic sensor as well as a less accurate BMP085. Any suggestions ???
Some do, some don't. Most ESC's today provide 5 volts to the receiver and the servos via the 3-pin connector. It's not that common to have a seperate battery for the receiver anymore.
Jim
Robert T said...
Cluso
I didn't know that the ESC generated 5v at the three pin connector, I assumed this was supplied by the transmitting device, (receiver for RC devices). Is not the ESC power isolated from the control lines?
Robert
Robert T said...
I finished the test frame for my quad. As you can see it is built from hobby quality plywood. The lower platform is for the battery. The circuit board will be mounted on top with the RC receiver. I used the E-sky brushless outrunner motors(1000kv) with compatible ESCs(25A). The blades are 12" blades. Waiting on a few additional parts.
Robert: Yes I am interested in the frame weight too. Ply is usually too heavy.
hover1: I was planning to use the SCP1000-D11 (the I2C version). Both are listed obsolete even though Sparkfun will take backorders.
Pressure: The sensor will only provide a relative use, so the micro has to take a reading before lift-off. It is only really useful for returning to the takeoff ground level. However, I thought this would be useful and would save the need for ultrasonics for this type of landing. We can always add the Parallax Ultrasonic Transducer - just connect it to a servo input as we are not likely to use 8 inputs. We may use 8 outputs for an OctoCopter.
ESC/BEC: My BEC supplies 5V on the servo connector back to the receiver. I guess we could always cut the 5V wire or use a jumper with the wire removed.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
"What about the output center pins ?? Should I connect together ?? The ESC can provide power to these so I would have a conflict (all ESC's may generate 5V and so would be supplying in parallel) and this is bad practice. Do I just provide the first one, or not at all ??? I didn't really want to provide links for each as well as it adds another 0.25" to the pcb, but then again maybe I should ???"
Do not connect ESC (BEC) outputs in parallel, just provide one Ray! Indeed, It's a bad practice.
Thinking further on the centre pins... It would be possible to not insert the centre pins. Otherwise, if I don't join them, it would be easy to run a wire along the pins on the solder side to short them if required. We may want them to control servos for a camera later.
I will be using 100R (or 150R) series resistors for the 8 RC inputs. We should not need series resistors on the ESC outputs.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
The wooden frame is for testing purposes only. The plywood is not very heavy. It is meant to me used to build RC model planes. I will weigh it later and post. The motors weigh 45 grams each. The battery(LiPo 3C 2100 mAh) is heavier than the wooden frame. The metal screws probably weigh as much as the plywood platform and I will replace them with plastic screws when I find some.
I connected a single motor and placed the battery on the copter frame to see if it would lift the frame. It did lift that side of the frame with the battery in place very easily
Regarding the center pins, it depends on the ESC's used. Castle Creations, for example, are designed to be run in parallel to provide additional amperage if desired. I would be willing to bet that most aren't designed this way intentionally, but if they're just using standard voltage regs, isn't it safe to run them in parallel?
On mine I connected all the center pins on the board, but just pulled them out of the ESC connector and taped them out of the way on all but one. I'll be using the same set of outputs to drive servos, so I didn't have the option to leave them all disconnected.
EDIT: With all these fancy, USB programable ESC's you would think that you should be able to turn the BEC on or off, but I can't find one that does that.
What a great thread- so much information... I think with all the input, this will end up being one of the most capable quadrocopters.
Cluso- yes, balancing a quadrocopter should be quite similar to balancing a dancebot. My biggest advice is that since this is a complex system to take it one step at a time- hence my suggestion to incorporate human control- at least during the debugging phase. It'll be wonderful to look at all the data from the different sensors- but getting software right the first time is hard on something like this. That's why I liked my friend Mark's idea- integrate gyro+rc input to drive both the pitch and roll while directly driving thrust and yaw and altitude. I'm travelling through July, so won't get a chance to build one till then...
Hanno
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Co-author of the official Propeller Guide- available at Amazon
Developer of ViewPort, the premier visual debugger for the Propeller (read the review here, thread here), 12Blocks, the block-based programming environment (thread here)
and PropScope, the multi-function USB oscilloscope/function generator/logic analyzer
hover1: If you look inside a BEC/ESC you will see there is no room for any additional components. Until now, probably most users only had a single BEC/ESC. Of course we need 4 for a Quad.
I will leave the centre pins unconnected on the pcb and you can solder a wire across the pins to short them if required. I will make a connection each end for this to be easy with a straight tinned wire (such as the end of a resistor). So unless anyone objects, this is what I will do.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
Here are the numbers for the wooden test frame for my quad
1. Wooden frame with metal screws and velcro strips: 340 grams
a. Square platform (3): 5 3/4" X 5 3/4" X 1/4" square platform
b. Struts for mounting motor(4): 11 1/2" X 1" X 1/4"
c. Screws with nuts and washers(4) 3"
d. Plastic Spacers(4) 1 1/2"
Total Width: 24 3/4" end of motor strut to end of opposite motor strut
Height: 2 3/8"
2. ESC(1): 22 grams
3. Motor and 12" propeller (1): 51 grams
4. Battery (1): 180 grams
Have not decided whether to connect all four motors to one battery or two motors per battery or a separate battery for each motor.
Yesterday I went to get Carbon Fiber tubes at my local Hobby Shop (www.hobby-lobby.com), but they do not have 10MM, only 8MM. They used to carry 10MM at one time, but do not any more. I will try the 8MM to see what happens. I can always use them on other RC projects if they don't work out.
I'm in the middle of packing for a move so all my RC stuff is in boxes so I will not have access to my parts for weight measurments. Bummer I will not be able to help until the middle of May.
Thought I would try and run my ESC/motor/prop & LiPo over the w/e but didn't get to it.
I looked in the OBEX for a simple routine to drive the ESC but I didn't find one. Has anyone done this? Otherwise I will just write a simple program to output a "1" for 1.0ms and gradually increase it to 1.5ms (50%) with the cycle time being 20ms. This is correct isn't it? Think I will use the keyboard and keys 0-9 to indicate a percentage of full power, initially disabling above 5.
I need to see my engine run
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
I wonder if a quick solution to test the ESC's is to download the Propeller Servo Control Firmware, and run the Parallax Servo Control Interface (PSCi) program and set the speed with the sliders.
It's using Servo32.
My parts have arrived from the US. I sneezed and I lost them LOL!
Seriously, these chips are small, especially since there are moving parts in there somewhere. You just do not realise how much you have magnified it when laying out a pcb on screen.
The GPS looks nice. As stated, it comes with a cable. The GPS module can be mounted with double sided tape or professional velcro - there are no mounting holes or any other method. I will post a coulple of photos when I get a chance.
Since power to the RC receiver and throttle are on the same three pin connecter, I had to make a harness to separate the receiver power from the throttle control line.
One connector end goes to the Receiver, one goes to an I/O pin on the Robot Control Board for power and the control wire goes to a separate I/O pin on the Robot Control Board.
For the other receiver outputs I simply cut the power line(Red). The receiver outputs 5 volts for the servos. Since I am only interested in the signal, I cut the power wire. The power to the ESCs will come from the Robot Control Board.
My first round of code will be simply to receive control information from the RC receiver as sent from the RC transmitter and convert this into simply motor control.
The information is from the receiver is basically more or less Throttle, Aileron, Elevator, and Rudder, which will have to be converted into more or less power for each of the four motors.
I have modified·the Single_Servo_Asembler program written by Gavin Garner to drive an ESC and Brushless Motor using the PC keyboard to vary the speed. The program has been posted to the OBEX http://obex.parallax.com/objects/599/
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
Of particular interest was the almost exclusive use of aluminium square tubing for the frame. Maybe we should consider this as it is easier to get than carbon fibre.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Links to other interesting threads:
Comments
A gyro chip that can interface with an accelerometer chip and
has on-chip processing with I2C.
http://invensense.com/index.html
Video showing how it works on a cell phone
Video explaining the difference between how accelerometers and gyros work
Quasi open source electronics modules primarily for use with Arduino but might adaptable?:
http://www.liquidware.com/
Just in case, if you're not sure if you've crashed or not, they have a crash test sensor so you can tell just how hard you hit the ground:
http://www.liquidware.com/shop/show/SEN-CTS/Crash+Test+Sensor
From Makershed.com a ArduPilot, an autopilot/nav board, the open source code for it might provide some ideas
http://www.makershed.com/ProductDetails.asp?ProductCode=MKSF4&Show=ExtInfo
A question for the channels and the power connection...
I am presuming to connect all the center pins on the input channels together and to 5V.
What about the output center pins ?? Should I connect together ?? The ESC can provide power to these so I would have a conflict (all ESC's may generate 5V and so would be supplying in parallel) and this is bad practice. Do I just provide the first one, or not at all ??? I didn't really want to provide links for each as well as it adds another 0.25" to the pcb, but then again maybe I should ???
Next problem is I have noticed that the SCP1000 on the www.vti.fi website shows this part as obsolete. I have not found any other part with the accuracy of this pressure sensor. I was hoping this would be a cheaper and simpler way to detect the height than requiring an ultrasonic sensor as well as a less accurate BMP085. Any suggestions ???
Postedit: I have been rechecking the BMP085 Pressure Sensor and it may in fact have enough sensativity for what we require. I ordered one.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
Post Edited (Cluso99) : 4/15/2010 1:48:14 AM GMT
I didn't know that the ESC generated 5v at the three pin connector, I assumed this was supplied by the transmitting device, (receiver for RC devices). Is not the ESC power isolated from the control lines?
The pressure sensor would not be useful in determining the absolute height unless the surface you are flying over is flat and before take off you took a baseline pressure reading. It is useful in determining relative movement in the Z plane(i.e. altitude changes). It could be used in conjunction with a z axis accelerometer. I think the pressure sensor is used to determine Z axis motion along with the Z axis accelerometer instead of using the GPS since GPS in inaccurate especially for altitude and has a low refresh rate. Actually the pressure sensor may be all you need to determine relative Z axis motion depending on how accurate you wish to be and how fast the sensor responds.
For true terrain following or the actual height of the copter above the ground would require ultrasonic, infrared, laser or vision sensors. Vision sensors (stereo vision) is beyond the scope of this project for now. Laser sensors are expensive. I am not sure how accurate infrared sensors are. So that leaves ultrasonic sensors. Initially I assume we plan on controlling the copter by RC. The gyros and accelerometers are for stablization. As we move to semiautonomous and autonomous flight we will have to consider GPS localization(flight planning, return to home, etc) and obstacle avoidance. I have thought about using the ultrasonic sensors for look ahead and terrain following.
Robert
Good call on the parallel ESC outputs. I had not though about that as I will be using non BEC ECS's. Yes, they are over kill, but the are on sale and they will be used in other projects later on. I think you could·isolate the 8*3 connector to blocks of two to incorporate one ESC and one motor, all sharing common ground. I'll have to visit tommorow, just got back from my second going away party this week.
"Next problem is I have noticed that the SCP1000 on the www.vti.fi website shows this part as obsolete. I have not found any other part with the accuracy of this pressure sensor. I was hoping this would be a cheaper and simpler way to detect the height than requiring an ultrasonic sensor as well as a less accurate BMP085. Any suggestions ???"
http://www.sparkfun.com/commerce/product_info.php?products_id=8128
1400 in stock.
Jim
Jim
Do you have a weight on what you have so far?
Jim
hover1: I was planning to use the SCP1000-D11 (the I2C version). Both are listed obsolete even though Sparkfun will take backorders.
Pressure: The sensor will only provide a relative use, so the micro has to take a reading before lift-off. It is only really useful for returning to the takeoff ground level. However, I thought this would be useful and would save the need for ultrasonics for this type of landing. We can always add the Parallax Ultrasonic Transducer - just connect it to a servo input as we are not likely to use 8 inputs. We may use 8 outputs for an OctoCopter.
ESC/BEC: My BEC supplies 5V on the servo connector back to the receiver. I guess we could always cut the 5V wire or use a jumper with the wire removed.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
Do not connect ESC (BEC) outputs in parallel, just provide one Ray! Indeed, It's a bad practice.
Sz
I will be using 100R (or 150R) series resistors for the 8 RC inputs. We should not need series resistors on the ESC outputs.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
I connected a single motor and placed the battery on the copter frame to see if it would lift the frame. It did lift that side of the frame with the battery in place very easily
On mine I connected all the center pins on the board, but just pulled them out of the ESC connector and taped them out of the way on all but one. I'll be using the same set of outputs to drive servos, so I didn't have the option to leave them all disconnected.
Jason
·http://www.action-electronics.co.uk/pdfs/BEC.pdf
·Jason has the right idea.
Jim
EDIT: With all these fancy, USB programable ESC's you would think that you should be able to turn the BEC on or off, but I can't find one that does that.
Post Edited (hover1) : 4/16/2010 12:09:18 AM GMT
Cluso- yes, balancing a quadrocopter should be quite similar to balancing a dancebot. My biggest advice is that since this is a complex system to take it one step at a time- hence my suggestion to incorporate human control- at least during the debugging phase. It'll be wonderful to look at all the data from the different sensors- but getting software right the first time is hard on something like this. That's why I liked my friend Mark's idea- integrate gyro+rc input to drive both the pitch and roll while directly driving thrust and yaw and altitude. I'm travelling through July, so won't get a chance to build one till then...
Hanno
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Co-author of the official Propeller Guide- available at Amazon
Developer of ViewPort, the premier visual debugger for the Propeller (read the review here, thread here),
12Blocks, the block-based programming environment (thread here)
and PropScope, the multi-function USB oscilloscope/function generator/logic analyzer
I will leave the centre pins unconnected on the pcb and you can solder a wire across the pins to short them if required. I will make a connection each end for this to be easy with a straight tinned wire (such as the end of a resistor). So unless anyone objects, this is what I will do.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
1. Wooden frame with metal screws and velcro strips: 340 grams
a. Square platform (3): 5 3/4" X 5 3/4" X 1/4" square platform
b. Struts for mounting motor(4): 11 1/2" X 1" X 1/4"
c. Screws with nuts and washers(4) 3"
d. Plastic Spacers(4) 1 1/2"
Total Width: 24 3/4" end of motor strut to end of opposite motor strut
Height: 2 3/8"
2. ESC(1): 22 grams
3. Motor and 12" propeller (1): 51 grams
4. Battery (1): 180 grams
Have not decided whether to connect all four motors to one battery or two motors per battery or a separate battery for each motor.
So without battery: 632 grams
Thanks for the update.
Yesterday I went to get Carbon Fiber tubes at my local Hobby Shop (www.hobby-lobby.com), but they do not have 10MM, only 8MM. They used to carry 10MM at one time, but do not any more. I will try the 8MM to see what happens. I can always use them on other RC projects if they don't work out.
I'm in the middle of packing for a move so all my RC stuff is in boxes so I will not have access to my parts for weight measurments. Bummer I will not be able to help until the middle of May.
I looked in the OBEX for a simple routine to drive the ESC but I didn't find one. Has anyone done this? Otherwise I will just write a simple program to output a "1" for 1.0ms and gradually increase it to 1.5ms (50%) with the cycle time being 20ms. This is correct isn't it? Think I will use the keyboard and keys 0-9 to indicate a percentage of full power, initially disabling above 5.
I need to see my engine run
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Check out the Propeller Wiki·and contribute if you can.
It's using Servo32.
·http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/servo/List/0/SortField/4/ProductID/595/Default.aspx
Jim
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
Runs fine with slider set to 1500 (no throttle) to 2500 (full speed). Nice little test bed for servos and motors.
ESC ran true even through the voltage translator.
Thought I would share. Another free gem from Parallax even though PSCi is Beta.
Edit:This firmware can run on any basic Propellor platform. With or without voltage translators.
Jim
Post Edited (hover1) : 4/19/2010 10:20:48 PM GMT
Seriously, these chips are small, especially since there are moving parts in there somewhere. You just do not realise how much you have magnified it when laying out a pcb on screen.
The GPS looks nice. As stated, it comes with a cable. The GPS module can be mounted with double sided tape or professional velcro - there are no mounting holes or any other method. I will post a coulple of photos when I get a chance.
Here is another thread posted by Timmoore. He is using a prop and there will be some advantages with the synergy here.
X,Y,Z IMU (accelerometer, gyro and compass)
http://forums.parallax.com/forums/default.aspx?f=25&m=386061
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
Today I finished the basic setup for the test frame: I decided to use two Lipo batteries for four motors so I had to build a harness.
One connector end goes to the Receiver, one goes to an I/O pin on the Robot Control Board for power and the control wire goes to a separate I/O pin on the Robot Control Board.
The information is from the receiver is basically more or less Throttle, Aileron, Elevator, and Rudder, which will have to be converted into more or less power for each of the four motors.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
Of particular interest was the almost exclusive use of aluminium square tubing for the frame. Maybe we should consider this as it is easier to get than carbon fibre.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz