Can anyone help me on designing a circuit board that will detect motion using an ultra sonic sensor that will detect at a distance off around 15meters. I would also like to put a time delay on, when detection is sensed . I would like to use a PIC16F628 microchip or equivalent and a 555 timer. I have tried to get boards to work but have had no luck. Any suggestions will be much appreciated.

Many thanks

Pansonnic

 

Hello,

Take a look in the links of this page of the EDUCYPEDIA.
http://www.educypedia.be/electronics/sensorsultra.htm

Greetings,
Bertus

 

Hello,

Thankyou for your quick response.

Would I be able to use a swictching circuit that uses a PIC16F628 microchip and change the switch for a ultrasonic sensor or is there more to it than that?

pansonnic

 

Hello,

I have doen a little search on the internet and found these sites that may interest you.
http://www.ele.uva.es/~jesus/sonar/sonar.html
http://www.schematicmag.com/htm1/MONTHLY_FOLDER/september_2005/ultrasound_pic.htm

The links come from this site : http://www.schematicmag.com/htm1/freecircuits_8.htm

Greetings,
Bertus

 

A 2 lm555 one is the source running around 37kc pushing a 100 Ω speaker and the other is an lm555 with a speaker 100Ω tied as a one shot to pin 2. I actualy biult this thing ages ago.

 

Is that using the same PIC16F628 Microchip? What im tring to acheive is :- when the sensor senses movement, it triggers a timer that is programmed using the PIC16F628 microchip. The timer will be set at varied itervals.

Am I going about this in the correct way?

Many thanks

Pansonnic

 

Hello,

The text with the 16f628 says make a pulse on ra1.
The detector will "hear" the reflected signal, the distance is D=170 x t.
You want to "see" 15 meters, the time will be 15/170 max 88 msec.
If you "see" an echo within these 88 msec , there is an object present within range.

Greetings,
Bertus

 

Thankyou for your time. I will give it another go. hopefully I will get it working this time.
you have been a great help

Many thanks

Pansonnic