G
[email protected]
- Jan 1, 1970
- 0
Hello,
A while ago I came across a schematic for a slightly modified JDM PIC
programmer which I just finished building. Unfortunately using it with
IC Prog did not yield good results- even though Vdd and MCLR voltages
are present, I am only getting blank data when trying to read/write a
16F84A chip.
* What other signals should I be checking and what are the expected
values ?
* What are reliable settings in IC Prog ?
* Does the schematic look correct? I compared it with the original
design and noticed a 2.2k instead of 1.5k resistor and the transistors
are different, though they seem to have similar specs :
http://img218.imageshack.us/img218/633/jdmro1.png
Thank you!
A while ago I came across a schematic for a slightly modified JDM PIC
programmer which I just finished building. Unfortunately using it with
IC Prog did not yield good results- even though Vdd and MCLR voltages
are present, I am only getting blank data when trying to read/write a
16F84A chip.
* What other signals should I be checking and what are the expected
values ?
* What are reliable settings in IC Prog ?
* Does the schematic look correct? I compared it with the original
design and noticed a 2.2k instead of 1.5k resistor and the transistors
are different, though they seem to have similar specs :
http://img218.imageshack.us/img218/633/jdmro1.png
Thank you!