 | | Re: IR for bots
|
|
(...) Our robot worked well with a dual 555 timer. 38KHz for the IR and combined with a 500 Hz square wave. When the square wave was high, 38K was on, making it a 50% duty cycle transmission. As I understand the receiver circuitry, it was tuned to (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR Subsystem confusions.(Never Mind)
|
|
Oh never mind my questions. I read the other messages after this one and looked it up too. It now makes sense to me. Sorry. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Communicating through serial port
|
|
Hi, I am trying to use the my handy board to communicate with an application on my computer by passing integers through the serial port. From my understanding, a binary subroutine must be called to access the serial port. Is this true? If so, why? (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR Subsystem confusions.
|
|
Does the HB have demodulationg circuitry? According to the diagrams, the Sharp IS1U60 is connected to TIC1 on the HC11. Does this mean that the HC11 is doing the demodulation? Is the Sharp IS1U60 an IR demodulator, or simply and IR receiver? I (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR Subsystem confusions.
|
|
(...) It is a useful for wireless communication (one way), beacon detection (the 6.270 boards used it for this) and for collision detection. (...) The part on the Handyboard has a 'center frequency' of 38Khz whereas the Radio Shack part has a center (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
|
