Homebrew PCBs

Marc,

>Attached (in the copy to your email address) is the hex file. The /8 
>fuse should be set when you program the chip.

Your wiring sounds ok, though I didn't open my printer to check it 
all. Did you remember the 4.99K (5K) resistor pull up on the NPIS? In 
one drawing I labeled it 27K (since corrected).

No, I don't know how to check the laser.

You could test your mcu board by detaching it from the printer and 
using an external switch to replace the printer switch. Put a 
voltmeter on one of the mcu "sensor" pins and check the timing. Then 
do it again on the other sensor pins.

If you can't get it working I could send you a programmed mcu board, 
but I'd have to make one since I am out of them.

Mark


  ----------

:020000020000FC
:1000000009C01895189518951895189534C0189525
:10001000189518950FE90DBF29D01FD0B399FECFC1
:10002000789411271832F1F7C198F894B09B04C066
:10003000B399FBCFC19AF4CFC4987894112719349F
:10004000F1F7C29811271632F1F7C19A1734F1F778
:10005000C49A1039F1F7C29AE1CF02E00FBD04E073
:1000600003BF05E706BF04E009BF089506E107BB2B
:0A00700006EF08BB089513951895DC
:00000001FF


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