2-7
Module Description
Power interface Introduces a DC from the main board.
Recorder power
module
Converts the input power into voltages that fit each module and then
forwards them to each module.
Recorder CPU Controls the communications between modules.
Signal interface
Controls the communications between the main board and the recorder
CPU.
Motor drive circuit
Receives the control signals from the CPU and then forwards them to the
step motors
Button & LED
board
Includes one button and one LED which are directly controlled by the
CPU.
Speaker
The speaker provides sound for alarms, key strokes, heart beats and pulse, and allows PITCH
TONE and multi-level tone modulation. It is connected with the main board and is directly
driven by the main board.
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