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Thanks everyone, It works. So simple now I look back at it:D

Hi everyone, I have a challenge (4 me) at which after many many attempts and killed a couple SSR. Attached is my circuit. The first part of the ssr works as it has a led indicator built in. (HFS40...

Hi I have a car coil igniting a gas flame at a set time but what seems to happen is the lcd screen gets alot of garbage on it and the pic behaves erratic. When i test everything without the coil it...

I am using shiftin. Do i need to make all the ports digital ie adcon0 = 255
I think

Hi i am trying to use the max 6675 temp chip but looks like it keeps freezing. I can get 1 temp reading but no more. My question is can i read serial data on any pin with the 16f877

thanks ...

Thanks Brian your code idea works a treat. So how come yours does and mine doesn't????? I just don't understand why not. The only issue now i have is the servo keeps resetting itself(matter of...

Thanks ACETRONICS for a speedy response. I will have a look at it tomorrow as its late here in Australia.

Regards
Crazy Cooter

Hi everyone,
I am having difficulties using the ds18s20 and servo together on the pic16f88.
I find that i can't keep the 50Hz req for the servo except when its only running the servo code alone....

Thanks To Everyone Who Gave Me Advice Here. It Ended Up Being Two Dead Ds18s20. I Got Some New Ones Now And Its All Working Well.


Regards

Crazy Cooter

Ok i i flipped the wires on the ds1820 around (PIN1=3 PIN2=2 PIN3=1)
And now get

Done =1 FAM=$FF
Power=VDD

When i put a 10K pullup resistor on i get

Done =1 FAM=$10
Power=Parasite

Thanks darren you have been a big help.

The program initialy comes up with

Done =1 FAM=$10
Power=VDD

then half second later changes to

Done =1 FAM=$10

Hi everyone
Well this ds1820 ic is being a real pain. have gone over things with a multimeter and i have 5v going to pin 3. data is pin 2 and gnd is pin 1

This is what the front of the ic looks
...

ok have got it to work. i replaced the 4k7 resistor with a 2k4 resistor and rererererereread the data sheet for the ds1820 and put a pause 750 after the start temp conversion. IE.
OWOUT DQ,1, [$CC,...

i have tried it without the READ POWER SUPPLY. I have also tied a 4.7k resistor from the DQ line to 5V. Am i initialising it correctly??? This was a direct copy from melabs using "onewire.bas"

hi all. think i got the correct spot. i am having a issue with the dallas ds1820 temp sensor. i know it has been written many times. but think this is a different issue. i keep getting the same temp...

thanks everyone it works. i dont know what i was thinking when i wrote the code in the first place.

crazy cooter

HI all i am have a challenging time with my code here.
am using 5 if -then statements to read the ports status in digital. My problem is i can read each port on its own but not the whole lot grouped...

I have no understanding of asm so would take me a very long time to understand and implement.

2 decimal places is more than accurate enought for what i want to be doing
and all the adc will be...

Thanks skimask for pointing that out.

ok so i am 1 step closer to getting this to work now.

so the only way to do floating point maths then is with asm right?

and thats why my code will not...

thanks for the quick responce

got PBP 2.47 from DONTRONICS here in melbourne

Yes. Read the 213 pages and even been looking up web sites with references. downloaded the data sheet read the A2D...

hi all,
am trying to understand how to implament the ADC on the pic 16f877
my code is for a LM335 temp sensor connected to RA0(pin 2)
the VDD and VSS is from a 7805 voltage reg that also supplies...

Hi all,

am having problem with displaying deg C using the LM 335 temp sender
i believe i have set the AD settings right for 16F877 RA0 pin
have attached the prog and circuit

thanks

Thanks to everyone that responded. Its been great.

This project is for a fuel injected rideon. i have compleded an analogue circuit and it works ok. but i am not 100% happy with it. the o2 sensor...

This is my 1st post so i hope i got the right spot
i have PBP2.46

working with a PIC16f877a
having dificulties understanding the book on writting a table that is 16X16 see below
...

This is my 1st post so i hope i got the right spot
i have PBP2.46

working with a PIC16f877a
having dificulties understanding the book on writting a table that is 16X16 see below
...