Voltage Monitoring is an Electronics board that allows you to connect 5 to 14VDC on one side of the board and get it corresponding LEDs light on the other side. Every Car, tractor or boat should have one. The boards will allow you to easily monitor your 12V battery while powering from the same battery. The Terminal Block TB connector is included and makes it easy to use. 

When used as car-battery-monitor, it provides early warning of battery problems. Ideal to prevent flat batteries and other embarrassing incidents on your Car, RV or boat. The board gives visual indication via front mounted LEDs of current battery voltage. YEP--be in the green (green LEDs) and drive safe. Finally, connect the board to the car battery via front mounted terminal block is a snap.

There are three models, A, B and C. The main difference between the boards is that each model design to monitor different range of voltages. The changing voltages are indicate via Light Emitter Diode (LED) L1 to L8. 

Model A: Voltage monitoring 4.25 to 6VDC while at 5V half of the LED (left to right) will light

Model B: Voltage monitoring 7.25 to 8.75VDC

Model C: Voltage monitoring 11.5 to 12.5VDC

LEDs configurations

Shown above in three different LEDs configurations:

Top: Different color large LEDs.

Center: Small red LEDs mounted perpendicular to the PCB.

Bottom: Small red LEDs mounted in a vertical position, and wires configuration (option).

Kit Includes

• LM324                  Op-Amp                 2pc.

• 1K Ohms               Resistor                 7pc.

• 470 Ohms             Resistor                 1pc. (model A only)

• 4.3K Ohms            Resistor                 1pc. 

• 1.2K Ohms            Resistor                 1pc. (models A and C only)

• 1.5K Ohms            Resistor                 1pc. (models A and C only)

• 680 Ohms             Resistor                 8pc.

• 20K Ohms             Resistor                 1pc.

• Red                     LED                       8pc. (large) small LEDs are available

• 1K                      Trimmer                  1pc.

• 1N4148                Diode                     2pc.

• 1N4733                Zener Diode            2pc. (model B only)

• 1N4737                Zener Diode            2pc. (model C only)

• 2P Terminal Block   Connector              1pc. 

• PCB                                                 1pc.

Application-note

Monitor your 12V battery mount it directly on your car, boat or tractor dashboard

Schematic

Description and SKU#

Price

Picture

Voltage monitoring Model A (8 levels) LEDs

EID-K-VMO-5A-ASM Fully assembled

EID-K-VMO-5A-KIT Kit

37.00

25.99

Voltage monitoring Model B (8 levels) LEDs

EID-K-VMO-8B-ASM Fully assembled

EID-K-VMO-8B-KIT Kit

37.00

25.99

Voltage monitoring Model C (8 levels) LEDs

EID-K-VMO-12C-ASM Fully assembled

EID-K-VMO-12C-KIT Kit

37.00

25.99

EID-K-VMO-XXA-P PCB Only

15.99

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