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\F3\C154 EAST DANA STREET
\CMOUNTAIN VIEW, CA. 94041
\F4\←L\-R\/'7;\+R\→.\→S   Telephone:
\←S\→.415-965-0557
\F1\CApril 14, 1975



Dr. Amos Freedy
Perceptronics 
6271 Variel Avenue
Woodland Hills, Ca. 91364


Dear Dr. Freedy:

\J
	Last  August  I   sent  you  some  information  on   our  two
manipulators.   At the time  you were interested in  providing an interface
for these products.  In  that letter, I mentioned my plans  to design
and build our own interface.  

	Since  that time,  I have  found myself  totally involved  in
mechanical  hardware  development  and  have  had  to  put  interface
development aside  until recently.    Now, instead  of attempting  to
develop an interface entirely  in house I am entertaining quotes
from outside firms such as yours.  

	I understand  that you  have provided  an interface  for  the
PDP-11 system at Purdue University, for use  by their Hand-Eye Group.
The  interface we have in  mind probably would have  many of the same
features as the one you provided. 

	For the present, we are interested in a  plug in system for a
PDP-11/45 with the following  main features.

	32 channels of 12 bit resolution A/D. (+- 10vdc signal range)
	8  TTL level bit output lines
	8 channels of 12 bit DACs (+-10 vdc signal range)
	Random access of A/D channels (50 micro-secs max. time to access
		 and read any one channel.)
	A couple of status bits with interrupt capability
	The data rate is slow enough so as not to require DMA.

	The unit must  be "stand alone"  in the sense that  it should
have  its own power  supply, and shall  plug into  a PDP-11/45 unibus
with the proper  cards provided as  part of the  system.  The  analog
signals and TTL bits shall go through a standard connector. 

	Please let  me know whether you are interested in quoting on
an interface of this sort.\.
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Yours sincerely,



Victor Scheinman
    President

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VDS:pdp10