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.
hello,
i am making a wireless door opening alarm for project inspired from efy august 2014 edition.
here is the pcb layout as given in efy:
Now since it says "An actual size pcb layout", my question is:
Can I directly print it on a photo-paper and then use it for imprinting on my pcb using an...
i adjusted the VR1 to its full capacity but the freq does not go beyond 75Khz at TP2, and thus i get only lyk 37-38Khz at the transducer...
What should I do?
- - - Updated - - -
My collector voltage at the first transistor in the receiving section is almost same as VCC.
And also the V(BE) is...
hello, my project is wireless door opening alarm...its taken from efy aug 2014 edition.
here's the ckt with transmitter and rec.
here are some of the changes i made:
1. instead of reed switch, am using 2 open wires to act as a open and closed switch as req
2. using 1 more led instead of peizo...
here's the code once again for convenience:
// Program to make a digital clock with integrated Alarm and digital thermometer
#include<reg51.h>
#include<stdlib.h>
#include<stdio.h>
#include<math.h>
#define port P1
#define cont_port P3
#define dataport P2
sbit rs = cont_port^0;
sbit rw =...
There is no adc.h!!
U might have seen the code....in that the main function calls the function "temperature()" which in turn calls the function "adc()"...and the "void adc()" does the adc conversion. There is no header file for it!
????
ok...i switched back to adc0804 since i didnt require 8 input channels provided in adc0808.
sry for the previous posts.
now when i simulate the circuit, the temp part of the code doesn't seem to work due to which the clock doesn't start.
Though i receive no errors while compiling the code.
i...
thank you for the link.
i changed my circuit and interfaced adc 0808 with lm35.
but i get the following errors while compiling with keil uvision:
compiling clock1.c...
clock1.c(159): warning C206: 'InitADC': missing function-prototype
clock1.c(160): warning C206: 'ReadADC': missing...
hello,
my project is 'LCD based digital alarm clock with digital thermometer using 8051 microcontroller (AT89C51)'.
here is my circuit with the o/p:
and here's the code:
// Program to make a digital clock with integrated Alarm and digital thermometer
#include<reg51.h>
#define port P1
#define...
Its a AT89C51 Microcontroller
I am using keil uvision as my compiler as it also allows me to create hex file for programming the device.
- - -updated - -
i will try connecting vee to ground...
as far as the black boxes are concerned,
ideally when i power on the ckt, the following message...
Its a AT89C51 Microcontroller
I am using keil uvision as my compiler as it also allows me to create hex file for programming the device.
As far as the black boxes are concerned, its a bit strange coz
ideally when i should power on the circuit, the Lcd should initialize with the following...
Hello,
My project is interfacing a keypad & LCD with microcontroller i.e i press the button on my keypad and the LCD displays the number and number of times the key is pressed.
If you see the above code,it uses a header file lcd.h
The code for the header file is:
//LCD Module Connections...
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.
