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Old 19th May 2003, 02:39 PM   #31
Elkaid is offline Elkaid  Canada
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Using ZIF sockets is a nice idea but you'll need one on your programmer and one in your target board (your prototype).
40 pins ZIF sockets aren't cheap.

Using ICSP (In-Circuit-Serial-Programming), you only need those pins : GND, +5V, RB6, RB7 and /MCLR. This way, you don't need to remove and insert your chip all the time.

As you probably know, Microchip ICD schematics are available on their website so why not use them ?
i found on the following site a complete ICD projet with PCB, instructions etc... You don't want to miss that link.
Here's the original version of the previous link with color pictures

Take a look, you won't be disapointed.

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Old 22nd May 2003, 12:21 PM   #32
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Default comments?

been surfing:
it seem like there is a hundred variants of each parallel port/serial port PIC programmer out there.
I suspect people could not understand each others diode-cap-zener combos to create the required +5 and +12
most seem to be PC port dependant
the real RS232 spec on a serial port is huge 3-25v, thus the variants

If you have a desktop PC keep in mind these voltages ara available on a HD connector. I am leaning towards designs with an external (HD?) power - seems much more reliable.

low voltage programming looks like you give up a pin, which seems restrictive to me

if I was going to buy one the picflash USB or clone seems to have a future

if i was building for simplicity - the ludipipo w external supply is like 3 resistors. period.

ludipipo and jdm and jmb and c84 all seem to use the same rs232 pin assignments.

ic prog seems like a strong programmer supports most hardware , lets you tweak


edit-I see lots of complaints about the el-cheapo (predko), cuz there are so many or the architecture?
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Old 23rd May 2003, 02:17 AM   #33
future is offline future  Brazil
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Mine is -11.15v on pin 7
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Old 4th June 2003, 04:26 AM   #34
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check the microchip site for free seminars

grumpy cuz I didn't win the free usb programmer
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