For a tilt sensor you can use the Analog Devices ADXL202 very easily with a PIC. It outputs a PWM signal roughly proportional to the degree of accelleration it senses in its sensitive planes. Normally the only acceleration it will sense is gravity, but it's useful for +- 2g's. The main problem with it is the tiny size compared to discreet components. I had to buy a breakout board to make it useable for prototyping. I guess if you're making a PCB then it shouldn't be a problem at all. I got the breakout board from sparkfun.com for a few bucks. They also have a decent article about using it I believe. D ----- Original Message ----- From: "Elias Nakos" To: Sent: Friday, December 05, 2003 5:01 PM Subject: [PIC:]Sensors for Mobile Robots > Hi all, > I am an master student in robotics and automation, and I am building a hexapod robot for my dissertation. Could you please give me any information about sensors available for mobile robots especially legged ones. I know that there's a book around but I can't afford it. So is there anyone kind enough to tell me what sensors i could use and brief information on how to interface them (h/w & s/w interface) with 16f877 or at least any web site giving such informations. The ones that I am currently using are simple IR photodiodes (18 to 20 degrees) for object recognition, photoresistors (LDRs), ultrasonic and I am bit confused about the type of contact sensors I could use. A web site would be enough, but could u propose a type of contact sensors and especially a good Tilt or INCLINATION sensor. i am currently using a tilt switch which is off at 90 degrees. Imagine the robot to get an inclination of 90 degrees until the switch goes off!!!! I guess there's no coming back from that state. Anyway any help would be great. Thank you guys. > > yours, > Elias Nakos > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body