Electronic Circuits and Projects Forum

Welcome to ETO
instead start using 16F628A as this can be reprogrammed many times. C series (called One time programmablae-OTP) can only be programmed once and end of it, that is not meant for people like us.
regarding programmer, any one made on breadboard, might become uncertain unless you are very good at making breadbard projects.
MPlab , can be downloaded free from www.microchip.com It helps you learn and write code in assembly language.
otherwise you have to use PIC basic or some C language.
like Mikro C or CCS C , Hitech C for pic for writing in asm , you might follow beautiful tutorials from Nigel Goodwin PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

Try to use always Lower case letters. otherwise people feel that you are shouting , LoL

Originally Posted by mvs sarma

Welcome to ETO
instead start using 16F628A as this can be reprogrammed many times. C series (called One time programmablae-OTP) can only be programmed once and end of it, that is not meant for people like us.

The 16C84 was a re-programmable chip - the first and only one at that time - it predates the use of F for the EEPROM/FLASH based devices.

It was replaced a LONG time ago by the 16F84, which in turn was replaced LONG ago by the 16F84a, then by the 16F628, then the 16F628a (these were all last century) - with the 628a now much of an antique.

Thanks Nigel, hope that freshers can start learning on 16F628A and later migrate to 16F877A and / 18F2(4)550, or 18F1320

now in lower case Sir,ha ha ha
by the way you people really helped a lot,& few mins before I have downloaded MPLAB & winpic800,is it ok?



Regards
Hassan

Originally Posted by mvs sarma

Thanks Nigel, hope that freshers can start learning on 16F628A and later migrate to 16F877A and / 18F2(4)550, or 18F1320

Incidently, the 16F877 was the second of the re-programmable PIC's - after a number of years of the 16C(F)84 being the only one.

Originally Posted by hassankhan

now in lower case Sir,ha ha ha
by the way you people really helped a lot,& few mins before I have downloaded MPLAB & winpic800,is it ok?Regards
Hassan

That's a good start what kind of programmer did you make JDM ? A lot of newer computers don't put high enough voltage levels on the serial port to use a jdm type programmer.

The chip your using should program fine with a jdm as long as your computer serial port has the right voltage level. There not much to tell write some code and try it.

Jdm programmer's worked fine till Pc makers started not putting serial ports on the PC I have a Dell that's 5 years old with Xp on it and it works fine using a JDM

But my newer PC will not raise MCLR high enough to program chips

@be80be,
what is your newer version mobo? i saw some designs that adopt MC34063A to derive the needed 12V odd for Vpp.
Modern laptops don't even have the COM port. This is where usb based pickit2 etc become inevitable. But, they too have issues, usb unable to support the power needs once larger chips come for loading hex. Many people advise buffered usb supply.

I some how got the externally powered programmer designed by DL4YHF working well under winpic800 driver. it doesn't use the supply from the DB9 port.