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I would prefer using serial port and ICs such as Max-232.
MAX 232 ????????I would prefer using serial port and ICs such as Max-232.
What do you think of this:
https://www.oshonsoft.com/picproghard.png
is it any better. I have a parallel port in my old computer.
hi,
I have made a couple of these for friends, they work fine, check that the software covers your PIC types.
Note what 3v0 says about the 13V+ source.
hi,Thanks eric. I am going to use parallel port. (since it requires less Ics and circuitry than the serial port)
Yes the software covers 16f877A. I think I can safely replace the 100n Caps with higher values.
How did you generate 13V+ source? I am thinking of using 12V battery in series with 1.5 volts. OR, just a fully charged 12-V Lead-Acid battery (which I posses) is enough as it is around 12.8 Volts?
(I amazed to see some people continually suggest me to use Pickits (which requires a preaccess to another programmer), despite my repeated desire to avoid them)
hi,
For the 13V, use a 12V regulator, 7812 or 78L12, add a couple of resistors to change the output to 13V.
thecritic said:(I amazed to see some people continually suggest me to use Pickits (which requires a preaccess to another programmer), despite my repeated desire to avoid them)