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hello friends, i have a 24v supply. i use lm7812 to convert 24 v to 12 v and drive 12v relay.i then convert 12v to 5v using 7805 and use for pic18f452 and lcd. i have some problem with this lcd. problem is like this.
sometimes some square boxes appear on my lcd and my pic will stuck on that...
dear friends,
i want to measure ac voltage and frequency using clamping principle.i used 2 1k resistor to clamp at vcc/2.i am using this program. as result i am getting correct ac value,some times. but sometime i am getting wrong result. can ant body spot any error
i am using ccs compiler and...
dear friends
i am using ccs compiler rtos .i want to use interrupt in this rtos .my doubt doubt is is there any problem in using interrupt in rtos ,espectially ccs rtos
thanks in advance
i am using pic programmer from nsk electronics
micro pro
**broken link removed**
when i am programming pic16f676,i am getting a warning
OSCAL value should be in the form of retlw instruction(0x34XX)
currently in the 0x3fXX form
would you like to change it?
yes no cancal
dear friends any...
i am using this cofiguration
#include <16F676.h>
#device adc=10
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOPUT //No Power Up Timer
#FUSES MCLR...
hello i am using this code to detect ac voltage in pic16f676.but it is not working properly.but it working properly on 684.please spot error thanks in advance
#include <main.h>
#define mains_ok PIN_C4
#define phase_seq PIN_A2
#rom 0x2100={255,170,0}
int1 voltage_check();
void...
i think the problem is not with eeprom.some times when error value shows,i just switch off and on system.on again reading eeprom no problem with eeprom. so what is the problem with this pic(16f873a) thanks inadvance
i am using pic 18f452 for a monitoring system
after completion of about 80% of program my program memory is at its 90% utilization.i observed that mainly two functions are consuming lot of memory,that functions are unavoidable in my circumstances. can any body suggest any method to increase...
i want measure voltage up to voltage up to -60v.i used potential divider 10k-680ohm.to step down voltage.then i connect it to v2-negative. v1 to common positive.but i am not getting value.as expected please help me
i am using pic16f873a eeprom to store value. in ccs compiler i write program like this
ROM 0x2100={35,27}
hc=read_eeprom(0);
lc=read_eeprom(1);
to read eeprom
write_eeprom(0,hc);
write_eeprom(1,lc);
to write eeprom
when i complete one cycle of this operation, iam not able to...
hello friends,
i am looking for circuit of 60v to 12v converter. i saw circuit using lm 2576hv,max 5035 ....... but these are high cost devices. somebody suggest me a simple,low cost circuit for this purpose.my requirement is 1a only. thanks in advance
i mislead by kHZ terms. sorry. when search for VU meter.i found it is full wave based average power indicator.then you can use full wave rectifier ----> filter----->pic adc to measure the level.i suggest trial and error method to calibrate
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