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1
Photo 1 The EE 188 Lab Power Supply
Displays Voltage Displays Current
Adjusts Voltage
Output voltage is available at these terminals
the is at a higher voltage than the -
The CV light indicates that the supply is
maintaining a Constant Voltage
2
Photo 2 What is this terminal?
This terminal connects to the power supply case
and to the power line safety ground. In most
cases it is not used. The internal voltage source
connected to the and terminals is isolated
from the ground terminal (sometimes referred to
as floating). This allows connection of the
voltage source to a circuit independently of how
the circuit might be connected to ground.
3
Photo 3
Adjusts Current Limit (With the terminals
shorted, turn the current adjust knob clockwise
to increase the current limit)
Note that the output voltage drops as needed to
limit the current
The CC light indicates the supply is providing
Constant Current
Safety Note This power supply has built-in
protection for a short circuit a battery, on
the other hand, might start a fire or explode if
shorted.
4
Photo 4
The current limit value is set using the current
adjust knob when shorted
You can also set or display the current limit by
holding in the DISPLAY/OVP/CC Set button rather
than shorting the output terminals with a wire
5
Photo 5
One lamp connected to the power supply
Arrows show direction of current flow
6
Two lamps connected in parallel
Photo 6
Note that there are 2 independent parallel
current paths
Arrows show direction of current flow
7
Two lamps connected in series
Photo 7
Note that there is only 1 shared series current
path
Arrows show direction of current flow