 | | Re: 100 sensors
|
|
Joe, A very handy way to connect lots of digital switches is to arrange them in a resistor ladder and connect them into an analog input. You could get up to 8 switches into one input, giving you 256 different voltage levels, in theory, but in (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR wall detection
|
|
(...) Keith I think it works. I managed to get a bread boarded version of the IR sensor working. A 555 provides a 40khz carrier. The 555's reset pin is directly tied to pin 5 of a 567. The carrier is modulated by the internal freq of the 567. A (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
|
| |
| | 100 sensors
|
|
I am interested in sensing with about 100 water activated switches and am wondering if this is at all possible with the Handy Board.I had thought that it might be possible to by making them all return different levels of current at the sensor input (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
|
| |
| | Re: LM629 and "quadriture incremental" encoders
|
|
James, That's probalby my post you read. I'm still working on hooking 'em up. I'm gonna use two 629's and two 18200 H-bridges. The 629 uses encoders simmilar to the ones in mobile robots. The quadrature encoder has two signals that are 90 degrees (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR wall detection
|
|
Keith, Try an LM567. It's a tone decoder with PLL and VCO. Basically set the internal freq. of the 567 any where between .01 Hz up to I think 500 kHz. Feed a signal into the 567 and if the freq's match up, the 567's output goes low. I've been (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
|
