Darkroom Timer with PIC16F84AP chip

[NewcastleSAR]

Hi folks..

I'm looking at building the Darkroom timer at:

https://www.electronics-lab.com/projects/oscillators_timers/019/index.html

but am having problems obtaining the PIC16F84AP chip. Is it possible to use a PIC16F62X chip?

If so, which version do I need and what mods would I have to do.

Many thanks

Declan

 

[Nigel Goodwin]

The 16F84 was replaced by the 16F628 last century, there was a migration document at MicroChip - but it's so long ago it doesn't appear to be there any more?. Essentially it's a drop-in replacement - just assemble the source code for the new processor - make sure you set the fuses correctly though.

You do need to add a couple of lines to turn OFF the comparators (see my tutorials which all include these lines), and I would check the GPR start address (again my tutorials include the correct value for the 628).

 

[NewcastleSAR]

Cheers Nigel..

Thanks for that. Off now to speak to our Internet Guys. They blocked your site in the school

Regards

Declan

 

[Nigel Goodwin]

Cheers Nigel..

Thanks for that. Off now to speak to our Internet Guys. They blocked your site in the school

Was it too popular?

 

[NewcastleSAR]

Nah!!

I was hoping to tell you it was categorised as 'adult material' but have just discovered:

This website has been categorised as "Freeware and Software Download".

Declan