Propeller Robot Module
Brandon C.
Posts: 106
New video and picture for the PRM:
Video
Get it at gadgetgangster.com/171
Features:
) 3x push buttons for user input
) and LCD for displaying sensor data, stats, or debugging information
) 8 Servo outputs
) 8 multipurpose I/O pins to use for any external circuits/electronics
) 64kb EEPROM
) 8 Processing cores
) 32kb RAM
Specifications:
4"(w) x 3.05"(h)
Time required to build: ~2hrs
Brandon C.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
No purchase necessary. See back panel for more details.
Tired of the same old robot brains? not enough processing power? Get the Propeller Robot Module now!!
Video
Get it at gadgetgangster.com/171
Features:
) 3x push buttons for user input
) and LCD for displaying sensor data, stats, or debugging information
) 8 Servo outputs
) 8 multipurpose I/O pins to use for any external circuits/electronics
) 64kb EEPROM
) 8 Processing cores
) 32kb RAM
Specifications:
4"(w) x 3.05"(h)
Time required to build: ~2hrs
Brandon C.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
No purchase necessary. See back panel for more details.
Tired of the same old robot brains? not enough processing power? Get the Propeller Robot Module now!!
496 x 371 - 57K
Comments
I saw the board at UPENE and can't recall why I didn't buy one there. I do have one question though, it appears that the servos are powered by the same supply that powers the board. Is there any provision to run the servos from a separate supply?
Ron aka sailman58
With a little modification I am sure you could run the servos from a separate power supply. The voltage regulator outputs 3 amps. I was able to run all 8 servos, but with the LCD going a little dark because of low power. I plan on making a few changes to the board in the future to provide much more power for the servos.
Brandon C.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
No purchase necessary. See back panel for more details.
Tired of the same old robot brains? not enough processing power? Get the Propeller Robot Module now!!
Post Edited (Brandon C.) : 9/2/2009 5:26:05 PM GMT
Open the Servo_Demo.binary with the propeller tool and click "Load EEPROM".
BTW there was a bug in the program which was causing the servo to jitter. I found out that each time the button was pressed I was telling the program to start the servo object, which was interfering if the button was pressed more than once.
Brandon C.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
No purchase necessary. See back panel for more details.
Tired of the same old robot brains? not enough processing power? Get the Propeller Robot Module now!!
Post Edited (Brandon C.) : 9/2/2009 5:32:24 PM GMT
It would really be good if you could support more than eight servos, and particularly important to keep the servos on a separate power supply. You don't often want the servos to have a different power supply with more power, and you often need to turn the power to the servos off while you program. Still, looks like a great board and a real bargain.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
My Robots
You could easily replace the jumpers between the pins and the headers with some 4.7k ohm resistors to add support for more servos, but extra resistors are not included. I am taking notes on everybody's suggestions and will make the necessary modifications in the next version.
BTW I am not sure if the board would really work for a BRAT robot, seeing as the board is kinda big (3" x 4.05")
Brandon C.
*adds "separate power for servos" to notes*
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
No purchase necessary. See back panel for more details.
Tired of the same old robot brains? not enough processing power? Get the Propeller Robot Module now!!
The reason why I think it would be great if someone would do this with the Prop is that the prop is much more powerful and it would be a much cheaper setup overall. The micro controllers they are using need to have a servo controller added in to handle the servos, so it is more expensive then what you are making.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
My Robots
Nah, it's actually 3"x2.3". If you made a mount for the board, I'm sure you could easily place it on the BRAT. Although the PRM is better suited for small-large rovers. I am currently making a small rover using Lynxmotion SES parts that will use the PRM, but will take a few weeks to finish. I hope that when it is finished I can post the project.
Brandon C.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
No purchase necessary. See back panel for more details.
Tired of the same old robot brains? not enough processing power? Get the Propeller Robot Module now!!