A

A

B

B

C

C

D

D

E

E

1

1

2

2

3

3

4

4

Black

Red

The CX101 digital panel meters will not operate from the same
voltage they are measuring. They need an independent power
source. Used together in this circuit they did not operate properly
from the same independene power source. Therefore, I used a 9 volt
battery for each meter and switched them on with a relay. The
relay would not be needed if a 3PST switch is used to turn the main
power supply and the 2 meter power source circuits on.

V in -

V in +

V in -

V in +

+

+

The Volt meter and the Amp meter are both CX101A digital volt
meters. For volts the meter is set for 200 volt max and for the
amps the meter is set for 20 volt max (across the 1 Ohm resistor).

To Power
supply

12 vac

Independent Power Supply for (9 Volt) Digital Panel Meters CX101A

+

+

_

_

_|

_

|

To Meter 2

To Meter 1

To digital meters

laj 2011

12 vac

120 VAC

+9VDC

~

~

_

+

To binding
posts

supply out

Power

V+ and V-

1 Ohm/25 Watt

1000uF

Bridge rect.

Volt meter

Amp meter

LED

820

9 Volt

9 Volt

12 V. Relay

L2