Hi again all,
If anyone's interested, i've started using ultrasonic rangers from http://www.robot-electronics.co.uk/
Their bottom of the line ultrasonic sensor, the SRF02, combined with a USBI2C creates a quick and easy distance sensor.
I haven't actually thought about how to mount the things in the car yet, but i've bought 2 and they're set up fine, quick VB app attached (mondeo pic copyright ford ;-) ).
You could have an USBI2C with every sensor, which would mean 4-sensors for £120.The SRF02 runs on the I2C bus, which i've been told I shouldn't extend more than ~2metres. The obvious plan would then be to have one USBI2C for the back bumper, and one for the front, with a total price of £80. I'm currently experimentally considering if a 'spider' arrangement, with the USBI2C in the center of the car, leading out to the four sensors, would allow me to reduce the price to about £65.
It could maybe be done cheaper by soldering it yoursef, and I wouldn't call it cheap, but i think £65 for a 4-sensor system is a pretty good deal, up to £90 for 6 sensors.
The only major flaw with these at the moment, is that they arn't waterproof. So, next work is to research trying to cover these as best as possible. Apparently just replacing the transeiver with a waterproof type doesn't work for some reason.
P4 2.8 HT, 512Mb Ram, 60Gb 2.5 HD, M4-ATX, SB Audigy2, BU353, Lilliput TS,Soundgraph Imon VFD,SONY Optiarc dvd Burner,RideRunner, iGo8, Custom Freedom 2.1
Haven't bothered with these for a while. There isn't really much source to work with - I just followed the instructions and sent data using MsComm in VB. Don't have the source with me anyway, if anyone wants it then I can send it next week.
ah, I thought about doing something like this....
for about 1 minute......
then it hit me......
cheaper, easier & better........
USE A CAMERA!!!!!!
in the end, it's the best way to go, if you can set up the display to auto switch in reverse your golden..... forget the beep beep beep beeeeeep boom....
Does any 1 noe how to construct a simple ultrasonic range detector circuit ???
can teach me or give me some guide.... Basically I dnno much about Ultrasonic sensor also....but i hope to construct 1 in 1month time.. i had try 1 like the picture i attach... for IC4 RX i had change to LM833N, this is because i can't buy it in market on NJM4580D....
any 1 have any idea??? or other circuit might help ???
I have built that exact circuit before. Very very finicky. I was learning about ultrasonics, and I am not sure why, but all I got was rail to rail bouncing. Easiest way is to use a PIC to measure the time span between output pulse and received pulse. If you need to design and build in 1 month (sort of like when the school semester ends...) then you should start designing now because a ripoff of a circuit will teach you nothing.
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@2k1Toaster can give me the pcb draw?please
Under construct: Dell Optiplex GX 150
Need help from all expert,
what is the voltage that come out from a ultrasonic Rx (400PT160)???
Below is my Rx circuit, if the Vout = 5V , mean that the U-sensor Echo is receive from the U-sensor. How to I gonna to prove that my circuit it correct ???
My Tx frequency is 40 kHz. 12V
Please help...!!! Urgent...