Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I am also working on same thing.To avoid the chance of data collision i am using slotted ALOHA algorithm to avoid collision by checking the carrier at fixed time.
This algorithm can also be used on larger scale. Your every node should have bi-direction communication capability.
In this algorithm...
If you want to use HC-SRo4 you have to know timers in PIC.
HC-SRo4 works on same principle same as old days sonar. To use it you have to send a 5ms pulse to its ping(trigger) pin. As soon as you make the pin high ultrasonic sensor send a wave. When the echo of this wave is received it makes its...
Everything seems right in your code.
Some time ago i also made the same project using same method, but i wrote different code. I used PIC18F248
Here is the code i used.
Reciever
#include <p18cxxx.h>
# pragma config OSC = HS, OSCS = OFF
# pragma config WDT = OFF
# pragma config BORV = 45, PWRT...
Hello, I have to control the light intensity of a bulb or tube light from the analog output or PWM signal from micro-controller.
This is a part of my project in which i am making autonomous system for house.
You can keep it simple by using arduino micro-controller and sensor as ultrasonic sensor.
Interfacing of GSM and ultrasonic sensor is very simple in arduino.
You can do this by 2 ways
1) use flip flops to construct a counter, a square wave generator for a 1sec clock, and decoders for displaying
2) use microcontroller (no need of separate clock generator, flip flop or decoders)
May be what you are looking is amplitude modulation. In this amplitude changes with a sine wave(generally) but amplitude remain constant.
If this is what you are looking for, then the remaining part is very simple.
Output of Opamp based differential amplifier is the amplified value of the difference of voltage between both terminals (i.e. v- - v+ and amplified with the gain value)
see this image https://upload.wikimedia.org/wikipedia/commons/a/a2/Op-Amp_Differential_Amplifier.svg
You can use a GSM communication between the two stations. Develop the remote station as a standalone controller which can adjust its voltage output according to the input.
Take that output and control the flow using any electric or pneumatic valve
You can develop a controlling process and SCADA system by mixing 4-5 things like (level controller + temp switch+ stirrer etc.) along with single loop or multiloop technique by manupulating many control variables.
Example for this will be: A mixing batch process which mix many liquids to a...
https://obrazki.elektroda.pl/1720811700_1378835929.jpg
This circuit is a substitute for LM324 comparator. This uses a BC547 npn transistor and is biased in such a way that it only gives either 5V or 0V.
Values for resistors are R1=1kohm, R2=R3=R4=330ohm.
You can feed this signal to your...
You can opt for LPC23xx series as they use ARM7TDMI versions. Cortex M3 is a name used for ARM7TDMI which are used for embedded applications. You should choose a microcontroller development board employing ARM processor.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
