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Can anyone think of how to detect a TTL 1 microsecond pulse using just a PIC? I'm not measuring the width - just the rising edge. I dont think I can do it using a 16f616. I'm afraid I'll have to use...

Read the data sheet - love that answer.. First of all I wouldn't even think to look at the analog portion of the documentation since I'm not using analog inputs. The fact is the pins are defined as...

New to PIC basic - programming a 16F15324 - a substitute of the 16F616. I'm setting up pin 2 of the IC to be a simple 0 or 1 detector w 5V.

It will not detect a 1 or a zero unless I make the pin...

Mixed results on that help. it doesn't remember every time I cycle power - 1 out 10 times it fails to remember

My ADCON0 register looks like this 10010011. Now I have to figure out why it worked.

starting from left

1 = Right justified, needed for 10 bit
0 = reference is VDD
0010 = using AN2
1 = not...

I will try -thankyou...

Your answer is appreciated, you took awhile to answer and you're right - read. Most people would just reply with - hey idiot - read the docs for petes sake.
I've read the docs about 25 times, but...

I'm using Analog port 2 on 16F616 - 4Mhz.. VDD as reference. Any help would be great. I didn't have to set the ADCON registers for 8 bit. Why is 10 bit different? Was I lucky?

I dont know what I'm doing.. I dont know what to set ADCON1 to.

Its working - but crazy numbers now - 32k instead of 1024 uggg...

I've been reading other posts - so I tried this to see if light would turn green - fail


DEFINE ADC_BITS 10
DEFINE ADC_CLOCK 3
DEFINE ADC_SAMPLEUS 50

ADCON1=%10000010

OUTPUT PORTA.1 ...

Note: - I'm not doing anything as far as CCP1CON, CM1CON0,CM2CON0, CM2CON1, ADCON1.

Yes I'm new...

I'm using a 16F616 analog input with a ADCIN routine. My resolution is 5V / 256 = about .19 mv. I'm using a voltage divider for the input with .1% tolerance resistors. Is there a better way to...

I have a circuit using a 12F683. It uses a PWM output that controls LED brightness. When the user turns off the circuit and turns it back on - it needs to remain at the same brightness as when was...

I'm using a 16f616 - but can be changed. I need to do 2 things at same time. I need a timer that has 2 stages - 1 minute on, 5 minutes off (controlling a relay). At the same time I need to monitor an...

update - you were right - I had to remove the cap (base to ground on npn) altogether for the PWM to even work. I was using a .1uf - seems it was filtering off the signal. I didn't look too much into...

Schematic...

Moral of the story is - things sometimes appear more complicated than they really are. Simply 2 or 3 lines of code solved this problem when to me for awhile it seemed like I had to address memory...

pic of board - 2 layer board with a 5v reg connected to a 12f683 - fet driving output pin with ground activating the changing of PWM duty cycle. I'm doing a bit of conditioning of the pwm out of pin...

thanks Dwight - do the commands above the main only happen once? - I thought once it hits main and we loop on main that it doesn't occur again - we read then the value only once.

Obvious answer...

1/2 my lab in basement - pick and place in foreground.. work area and test on right.

Jerson - I notice you have code on top of main: - the read and if - is that meant to be in the main? It actually compiled - and I have no endif for the if Duty > 128 statement... I dont understand...

I was in a rush this morning - I'm getting it.. I admit I panicked.. I do read - I work 80- hours a week - 40 hours at a real good job and 40 my own business... I try to save time sometimes...

ok I'm a bit slow - I'm old... the 683 has an EEPROM - I'll read after my day job how to do it - thanks guys...

any advice on the code I already have would be nice...

thats the spirit.... thanks for the ps..