National instrument
PCI-6601
Counter/Timer Device
5 V, 4-Channel Counter/Timer Device—The PCI‑6601 performs encoder position measurements, event counting, period measurements, pulse-width measurements, pulse generation, pulse-train generation, and frequency measurement. It features four counter/timers, digital debouncing filters, and TTL/CMOS-compatible digital I/O. The PCI‑6601 can perform one high-speed DMA transfer.