attiny 85 ping sensor

Other Hardware 3rd Party Boards
1

im trying to setup a attiny 85 as a standalone chip to handle data from a sr04 ping sensor to respond to my at mega to control leds
cupple of questions first does the attiny 85 support the serial monitor and i believe i ran in to a problem with the amount of pwm pins required there's 2 on the attiny 85 and the trigger and echo pins both need pwm to my understanding so the chip will run the sensor but i cant do any thing with the data that come back is that really where im at on this ?

2

ez8mm:
first does the attiny 85 support the serial monitor

First bullet...
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1285218245/25#25

and i believe i ran in to a problem with the amount of pwm pins required there's 2 on the attiny 85

Three.

3

thank you for pointing me in the right direction ! all figured out trouble ive ran in to is the amount of interference with running more then 2 ping sensors i think they are picking up on eachother because there is alot of random activity if i use only 2 it works fine but i only get 2 of the 3 colors at that point ....any input on that ? im working on trying cupple things like pace them out to check for echo at different times but it seems to only help with a ping time of more then 2seconds so my leds change vary slowly and not fluent the other thing im going to try when in get some more wire it space them out more

4

ez8mm:
i think they are picking up on eachother because there is alot of random activity if i use only 2 it works fine but i only get 2 of the 3 colors at that point ....

If they're ultrasonic ping sensors, you need to wait 70ms or so for the previous ping to fade away before firing out another ping.

5

that they are!, and that makes sense too i guess 70ms is an ok sacrifice i wonder if you could just send a specific ping per sensor and if that would make the timeing better or worse ? example :

sensor 1 ping 2 times
wait for 2 pings back calculate time }

sensor 2 ping 4 times quickly
wait for 4 quick pings back calculate time }

sensor 3 ping 6 times quickly
wait for 6 quick pings back calculate time }

then maybe you could fire all there when ever you want ?

idk,.... it way over my head in math formulas and code,...