[quote author="dpropicweb"]I should note that as well as the PIC18F2550 you can also use the more modern (and cheaper) PIC18F25K50 which is pin compatible. The Blink test hex file I posted above also works (programmed with MCHIP IPE and PICkit3 - it did complain about a config bit, but updated it itself).
Note: FLASH memory endurance for the 25K50 part is only 10K vs the 2550 part which is 100K but that shouldn't matter unless you want to spend your life reprogramming the chip :-)[/quote]
Wow men , thats very good news !!!!
I STILL HAVE MORE THAN 50 BOARDS TO GO !!!! Come and get them !!
a couple years ago , i made this small board, and still have around 100 bare pcb laying around. i'm practically giving them away on tindie...( or send me a pm) https://www.tindie.com/products/6439/
its very nice because:
- you can see all pin labels saving you some time. -you can order the chip as a free sample from Microchip. -the connector for the programmer is ready to plugin -usb connector too
Last year i made a small batch and it was quickly sold out. now I ordered a large batch , and im reducing the price for everyone to enjoy... i send worldwide via tindie....
I am working/developing in an alarm system , and i have almost all figured out except the battery backup power :
-I want to use a 12V lead acid batery , very common in alarm systems.. -i found some easy to implement trickle charging integrated circuits , which will take care of the battery charging.. -the idea , is the alarm continue to work , even if there is no electrical power in the house..;
the question: how can i gently : make the battery start suppling power when power is OUT , and the other way around too?
All ideas are welcome !!
one idea i had : use a small relay , conected in such way that in the absence of power , will plug the batery right away..
