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Yes that would be easier! I'll give it a go. It would still be interesting to know if the other method of adding an offset to timer-1 would work.

Thanks

Does this method of adding an offset to the timer also work for a 16-bit timer? eg timer-1 in 16F876?

The part I'm not sure about is the big endian/little endian order. ie

TMR1L is at 0x0E
TM ...

This may be a case of RTFDS (read the F... data sheet) first

It says

In addition to issuing a reset to the μP during power-up,
power-down, and brownout conditions, the MAX803/
MAX809/MAX8 ...

Doug,

Can you please explain the befefits of the MAX809? The PIC already has a 72ms (I think) power up timer, so what does the MAX809 do?

Thanks

Pat

Thanks, I will try running the LED dimmer at the low frequency.

Thanks also to Mark, I have some ideas to work with now.

Patrick

Unless this is a task you want to do for fun, or you've been told to for a course/collage/university etc you're doing, then have a look at http://www.oziexplorer.com/

You can scan any map, then geo ...

Just remember MOSFETs are very susceptible to ESD. Also if you're using them in an automotive environment, they must be protected against load dump using a transil (tvs).

You can read about differ ...

Thanks that sounds ok. So the PWM module just saves a bit of coding and variable use compared to your suggestion?

Hi there,

I'm about to start using the 18F series for the first time, my first chip will be 18F452 in QFN44 package. To date I've only ever used 16F876. I only have an old version of PCM v3.168, ...

If you scroll to the end of the page that Hans linked to you will read

Processors Supported

The file system requires 10-30K of program space and approximately 1.5K of SRAM (depending on user co ...

Hi there's been lots of LED display driver questions recently. Maybe this will help you. I've used the MAX7219 and the SCD55100 successfully before.

Maxim
MAX7219 - Serial interface (SPI or Micr ...

This is a really interesting thread as I've been wanting to have another more powerful processor in my development arsenal. I thought the 18F would be the logical choice, but when you look around, th ...

Thanks, I emailed Microchip Tech support and received the following reply:

Hi Patrick,

The pinout diagram is correct. We are in process of modifying the errata document to correct the table. Th ...

Sorry, this is a hardware question.

I'm considering using the QFN package of the 18F452. The only place the pinout is listed is in the Silicon Eratta sheet diagram shows OSC2 on pin 33, and OSC1 o ...

So Mark, given a new design, and the choice of either SPI or I2C, are you saying the preference should be SPI?

The reason I ask is I'm about to design a circuit with a sensor IC that has both SPI a ...