diagnostic tool

[Wen Yen Chan]

Since there is interest in the plans for the data logger I will have them 
scanned. My scanner is dead right now so it will take several days to get 
all the plans captured. The designs that I will be posting will be a copy 
of the original design notes (they may be a little difficult to follow). 
I will try to compile a list of connections between the different chips 
to make building the unit easier. 

Constructing the logger is not very difficult (about 1 weekend of wiring). 
Because of the relatively low clock speeds involved the device can be 
hand wired. The only part of the construction which may pose some 
problems is the fact that I used one GAL to simplify the design. I will 
include the JEDEC file with the programming specifications for that GAL 
in my later post. I will also try to make pre-programmed chips available.