Very Simple ICSP Programmer

[mvs_sarma]

Hi all,

Acircuit or assembled piece doen't work, the solution need not be hardware and we need not rush tp spend and order another readymade board-- If that does't work shall we run for a third item?

Just cool down and think logically we can resolve. afterall intermittent failure may be due to improper configuration of the hardware w.r.t O/S (like win98,winXP)

i quote a comment of a programmer designer Mr FENG (FENG3 programmer 5.3 ver8). he once idcated he was still using RCD programmer. It proves Hardware / sofware can be maintained and debugged than rushing for replacements.

See the requiremets of a particular chip are met as per programming considerations, while programming a chip. (sometimes one of the RA pins is tobe pulled down)

[Angus Anderson]

Hi Squibcakes-

Yes, on your suggestion I downloaded Winpic800 and you're right - about 3 to 4 times faster. Also allows programmming of code only, data only, or config only which is really useful. Am using it full time now. Tks for the suggestion.

I'll have a go at a '628A this weekend & see what happens. On the other side, I must have reprogrammed one '873A at least 24 times today, not one failure. Could it not be that the '628A is more sensitive to a slightly low VPP than the others? As far a I am aware, VPP should be 13.5v, but most workable (not laptop) RS-232 "12V" levels seem to be a little below that - mine is only 11.8v & it still works.

regards

Angus

[dizzydude]

hi everyone
Can someone please tell me how to use this setup to program a 18f2550 pic and the settings please???

thanks in advance for any info.