Hardware Reference
In-Depth Information
Figure 9.35
Audible output driver: (a) using a buffer; (b) using an
open-collector logic gate; (c) using a transistor
Figure 9.36
Pulsed audible alarm based on a 555 astable
A simple, general-purpose byte-wide output driver can be based around a
dedicated octal latch/driver of which the UCN5801 is a typical example. This
device is directly bus compatible but may also be used in conjunction with a
conventional parallel I/O port. The UCN5801 has separate CLEAR, STROBE,
