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I thought about it but the problem is UPS not only has to charge batteries other house load i.e fans and lights also comes through it and that load is constantly changing so the voltage will change with the load if there is anything like the formation above...........
Avr`s are expensive and...
Hi everyone,
I am using Mercury 1000va inverter powered by 12V battery for storing power in case of power failure (which is quite common in Pakistan). However I am facing a problem that is when the main supply voltage goes above 250V the ups goes into backup mode i.e instead of...
I asked for the LCD READ program not the WRITE program.......i.e i have to read the data from the internal registers of an LCD
---------- Post added at 21:55 ---------- Previous post was at 21:47 ----------
and remember that for read operation we give L-H pulse NOT H-L pulse
I urgently need an LCD Read Program that reads all the characters displayed on the 16x2 LCD......please help me in that... I made this program to read char wise but it doesn`t work
char read()
{
char h;
Rs=1;
Rw=1;
E=0;
delay(1);
E=1;
delay(1);
h=P1;
return h;
}
i am using simple infrared transmitter and reciever leds.....
i transmit a dc signal cia infrared trans. by biasing it at 5v (with a resistor to gnd)....and same way biasing the reciever but the reciever gives continously full voltage drop...i.e it is open circuited all the time
I want it to...
I want the simplest circuit using Infrared or sonar in which if there is any interruption in the path(may be 5-6cm long) then it gives a 1 to my microcontroller
---------- Post added at 18:32 ---------- Previous post was at 18:28 ----------
like a transmitter and reciever
give me the code for accessing :
1. 2716(2kx8) eeprom (parallel interfacing.) with 89c51.
2. internal eeprom 0f 89s8251 (using its own library functions).
3. interfacing 8255 with 89c51.
Note: All codes should be in C language
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