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These posts by ExperimenterUK have received thanks:

PC to PC data transfer
Abhinav.Chaurey wrote ...

i just want to send words typed in hyperterminal to other computer. this will be a one way data transfer. i tried a lot making circuit using HT12E/D but nothing happened. one...
Thanked 1 time
Posted by ExperimenterUK on Friday 12 March 2010 - 13:14:27

ADC 0804 --> MICr 8051--> Hyperterminal
Go back to something that works.

In hex2ascii() put a known value such as 0x34 into A before calling serialsend()

If that works pass fixed values to hex2ascii, such as 57 ,153, 230.
Let us know what ...
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Posted by ExperimenterUK on Tuesday 09 March 2010 - 15:44:03

GreenBee Project
Your main problem is that the diagram is wrong.
Connect 3.8 K between pins 1 and 2
Connect 1.5k between pin 2 and ground.
This should give you about 0.8 volts on pin1 for an input of 0.32 volts.

...
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Posted by ExperimenterUK on Sunday 07 March 2010 - 13:13:16

regarding programing of AT89S51
Try .....

CODE:

DELAY:
    MOV R1,#10
AGAIN3:
    MOV R2,#255
AGAIN2:
    MOV R3,#255
AGAIN1:
    DJNZ R3, AGAIN1
    DJNZ R2, AGAIN2
    ...
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Posted by ExperimenterUK on Friday 05 March 2010 - 09:41:54

GreenBee HELP interfacing Humidity Sensor !
ExperimenterUK wrote ...

If you use the preferred method of testing for the display being ready, you can save the
R/W pin by just using a fixed delay and assuming the display is ready.

You're right it'...
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Posted by ExperimenterUK on Sunday 28 February 2010 - 10:43:27

HELP : HOW TO DESIGN A CAR VENTILLATION SYSTEM
aiwa wrote ...

what is the simple and easier program I can use just to check whether my program has error such as syntax error or not?

Syntax errors will be reported when you compile your code.

Often the...
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Posted by ExperimenterUK on Saturday 27 February 2010 - 14:10:32

LCD pinouts
This data sheet for the main chip should help.
Look at the section for the S1D15B01

s1d15b01_lcd-driver.pdf
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Posted by ExperimenterUK on Thursday 25 February 2010 - 13:43:54

Atmega ADC in C
A PWM output is full on or full off(digital) so you don't need an ADC.

It occurs to me that for many PWM outputs you set it once, then it runs
stand alone.
This makes it a very poor "heartbeat" signal...
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Posted by ExperimenterUK on Thursday 25 February 2010 - 10:08:10

HELP : HOW TO DESIGN A CAR VENTILLATION SYSTEM
aiwa wrote ...

Ajay Bhargav wrote ...

and your start is missing a while(1) kind of loop. add a goto statement carrying the code to be executed infinitely.

CODE:
here goto here ;for example
 



Im not ve...
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Posted by ExperimenterUK on Thursday 25 February 2010 - 09:54:30

HELP : HOW TO DESIGN A CAR VENTILLATION SYSTEM
aiwa wrote ...

Can u check and make correction regarding on my programming for this interrupt because Im not so sure whether its correct or not.

I'm sure Ajay will check it for you,but generally we expe...
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Posted by ExperimenterUK on Tuesday 23 February 2010 - 13:21:07

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8051 Microcontroller Projects 8051 AVR tutorials PIC microcontroller, 8051 assembly language programming electronics and communication ECE CSE pdf ebooks library BE final year project ideas Embedded systems