pic programmer circuit

Hi Yash,

Majoka has posted 2-3 circuits of programmer. which one you've built? and what programmer software are you using for them?

also the olimex programmer circuit is simplest


you can make a six pin header and connect device to it. check olimex website for frontend software too.

hello sir sorry for late ,
i use pcb which is in pcb folder .i hv attached in earlier post. i made hardware . sir i hv used icprog1v06. when i m burning program there is no indication (acknowledgement). plz sir help me wt i m ding wrong. i m waiting yr response.

hi yashshailesh
i make it also on pcb and it work in first attempt
check ur connections once again
specially check transistors
all detail is given here
http://feng3.cool.ne.jp/en/pg5v2.html
in documentation 2 things are clearly mentions

1) I recommend checking to see if there is enough output voltage at the serial port your personal computer. If TxD, DTR, and RTS do not have more than +7.5V(or -7.5V), this programmer will not work well, especially, with the latest laptop computers that using low power RS232 interface ICs.

2) The GND line of a serial port forms relative VDD on a PIC programmer. All the GND symbols in a circuit diagram are a PIC programmer's GND. Never connect them with GND line of a serial port.

other important points r also available on above link

hello majoka & ajay sir,
thanks for yr kind support , sir my programmer is working. hello ajay sir as u came in this thread, it started working .
wt u r doing help for we such type of student is undefinable sir .thanks to both of u & 2 all.

welcome yashshailesh
its our duty

hello sir ,
i want to ask,
(1) i hv 2 type of crystal 12MHz & 24MHz. i m using Pic 16f877a. which one is suitable .
(2). what will be capacitor combination with that.

hi yashshailesh
it depend on ur application u want to do
normal pic has maximum 20 MHz operating range so use 12 MHz
use 22pf cap

Thanku sir,
Sir ; is d above programmer ckt (Ajay sir) supports "PIC18F90J60 " with winpic800?.

hi yashshailesh
see its documentation
it support most of the ic that software has
u can use winpicpgm software also it is best where if fails there i use winpic800
it never fail to program
that ics listed in software that r supported by hardware
some ics are special that's pin are not compatible with hardware
so use an extra board to program that

Thank u for ur kind information

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