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hai,
I attached my oscilator circut .some problem in this circut .change over time ups out put voltage is shooting .what is the problam in this design please help me?
hai,
I used pic 16f877a for generate 50hz square wave pwm output. I used crystel 20mhz.but i have some doubt in PR2 -calculation please help me
1)Pwm period = [(PR2+1)] x 4 x 20Mhz x Time prescale value
1/50 =[(PR2+1)] x 4 x 20mhz x Time prescale value
2) Pwm duty...
hai,
I used pic 16F877a in my avr program. I used trans former tappings 0-160v-192v-233v-240v-280v.240v tapping is connect output.my program input adc reading it is ok .the problam is relay chattering .how rectify this problam please help me.
interrupt problam?
I do this program in pic 16f877a .some problam this program .ie i think first switch on the project on the led that is ok then beep buzzer a perticular intervel this is not working please help me
lcd display error
.I used pic 16F877A for lcd interfacing and adc reading.
.I used PORTA(RA5) for battery voltage reading and display through the lcd.
.My adc program reading ok (ie battery full charge condition battery volt reach 14v display the lcd 1023v.
.i want to display direct battery...
lcd display
hai some problam in my pic 16f877a lcd interface program. i used PORTA (RA0,RA1,RA5) analog pins .i connect RA5 pin battery voltage through the resister devider voltage 5v(the battery is fully charged condition ie 14Vdc) .This adc reading is correct and display the RA0 adc reading...
switch
hai ihave a problam in my program pic 16 f877a with lcd .i used two micro switch connected through PORTE,RE0,.i decide to connect single push micro switch RE0 input high display the lcd after i repeat push switch RE0 input high display another program
how to write this program please...
zerro cross change over?
what is zerro cross chnage over ?how this function add change over time in pic programming? iam used 16f877a pic please help me?
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