streeter@theory.lcs.mit.edu (Kenneth B. Streeter) (03/08/91)
I am looking for an inexpensive Data Acquisition Card for an IBM PC. I simply need a card that can do EITHER of the following: 1) Count cycles of a single irregular digital TTL-level (0-5V) signal, with pulses occuring with at least 6.6 ms between pairs of rising (or falling) edges. (150 Hz) The count should be able to be read by a user program, and must be at least 8 bits of count, preferably 16 bits or more...) 2) Have 8 to 16 parallel lines that can be read, which would be connected to external circuitry performing the count of a TTL-signal like the one mentioned above. In this case, external circuitry could maintain the count, and the data acquisition card is used only to sample the count at any time. A card permitting option 1 would be preferred. The card would be useless to me without documentation or a sample application similar to the above. -- Kenneth B. Streeter | ARPA: streeter@im.lcs.mit.edu MIT LCS, Room NE43-350 | UUCP: ...!uunet!im.lcs.mit.edu!streeter 545 Technology Square | (617) 253-2614 (work) Cambridge, MA 02139 | (617) 225-2249 (home)