Technical data

Power Supply
The Elenco trainer has several built in DC power supplies to satisfy most electronic design needs.
The two variable DC power supplies produce up to +20 volts and -20 volts at 500 milliamps. Below 15v
the available current is over 1 amp.
Three fixed power supplies produce +12vdc, -12vdc, or +5vdc at 1 amp each.
All of the power supplies are regulated to within 150 millivolts. In other words, if you increase the
current draw from no load to 500 milliamps, the voltage will change less than 150 millivolts.
7
Figure 1
Figure 1
Variable negative voltage
control Varies negative
voltage from 0 to -20v at
indicated out
p
ut terminal.
Variable positive voltage
control Varies positive
voltage from 0 to 20v at
indicated output terminal.
Power output terminals
This provides 30VAC center
tapped at 15VAC. This also
provides the output terminal
for positive and negative
variable voltages.
On – Off switch
Allows power to be applied
to all outputs. Switch will
light when on.
Ground
-12VDC fixed
volta
g
e
+12VDC fixed
volta
g
e
+5VDC fixed
volta
g
e
Fuse holder
1.25A 250V
A variety of different voltages are
available at the power output terminals.
Because the Elenco trainer uses both the
+20v and -20v adjustable voltage
controls, a combined voltage of up to
40vdc is possible. (See Figure P-7)
0 to +20vdc
Ground
0 to 40vdc
0 to -20vdc
0 to +20vdc
0 to -20vdc
DC Voltmeter
DC Voltmeter
DC Voltmeter
Figure P-6
Figure P-7