Справочник Пользователя для PASCO Specialty & Mfg. AC/DC Electronics Laboratory EM-8656
5
012-05892A
AC/DC Electronics Laboratory
®
EQUIPMENT NEEDED:
– AC/DC Electronics Lab Board: Wire Leads
– D-cell Battery
– Graph Paper
– D-cell Battery
– Graph Paper
Purpose
The purpose of this lab is to become familiar with the Circuits Experiment Board, to learn
how to construct a complete electrical circuit, and to learn how to represent electrical circuits
with circuit diagrams.
how to construct a complete electrical circuit, and to learn how to represent electrical circuits
with circuit diagrams.
Background
➀
Many of the key elements of electrical circuits have been reduced to symbol form. Each symbol
represents an element of the device’s operation, and may have some historical significance. In this
lab and the ones which follow, we will use symbols frequently, and it is necessary you learn
several of those symbols.
represents an element of the device’s operation, and may have some historical significance. In this
lab and the ones which follow, we will use symbols frequently, and it is necessary you learn
several of those symbols.
➁
The Circuits Experiment Board has been designed to conduct a wide variety of experiments easily
and quickly. A labeled pictorial diagram of the Experiment Board appears on page 2. Refer to
that page whenever you fail to understand a direction which mentions a device on the board itself.
and quickly. A labeled pictorial diagram of the Experiment Board appears on page 2. Refer to
that page whenever you fail to understand a direction which mentions a device on the board itself.
➂
Notes on the Circuits Experiment Board:
a) The springs are soldered to the board to serve as convenient places for connecting wires,
resistors and other components. Some of the springs are connected electrically to devices like
the potentiometer and the D-cells.
the potentiometer and the D-cells.
b) If a spring is too loose, press the coils together firmly to enable it to hold a wire more tightly.
If a spring gets pushed over, light pressure will get it straightened back up. If you find a spring
which doesn’t work well for you, please notify your instructor.
which doesn’t work well for you, please notify your instructor.
c) The components, primarily resistors, are contained in a plastic case at the top of the board.
Keep careful track of the components and return them to the storage bag following each lab
period. This way you will get components with consistent values from lab to lab.
period. This way you will get components with consistent values from lab to lab.
d) When you connect a circuit to a D-cell (each “battery” is just a cell, with two or more cells
comprising a battery) note the polarity (+ or -) which is printed on the board. Although in
some cases the polarity may not be important, in others it may very important.
some cases the polarity may not be important, in others it may very important.
e) Due to normal differences between light bulbs, the brightness of “identical” bulbs may vary
substantially.
Experiment 1: Circuits Experiment Board
Resistor
Fuse
Light
Switch
Wire
Battery
(Cell)
(Cell)