Battery Power Level Indicator KA2284

DESCRIPTION

The KA2284 Voltage Level Indicator Module provides a logarithmic visual indication of a static or dynamic voltage level using LEDs.

PACKAGE INCLUDES:

• KA2284 Voltage Level Indicator Module

KEY FEATURES OF KA2284 VOLTAGE LEVEL INDICATOR MODULE:

• Uses KA2284 5-Dot LED Level Meter Driver w/ built-in rectifying amplifier
• Adjustable voltage range with LED display
• Use with AC or DC voltages
• 3.5 to 12V operation

The module can be used to indicate a voltage level such as for monitoring a DC battery level or for use with AC signals to implement a VU meter for audio strength or similar applications.

The module uses the KA2284 LED Dot Level Meter Driver IC to implement a  logarithmic LED dot indicator display.  The display consists of 5 LEDs – 3 green, 1 yellow and 1 red which are lit in sequence as the input voltage increases.

A single-turn potentiometer is used to set the range for the display.

The input for the voltage measurement includes a series capacitor for use with AC waveforms.  There is a small jumper on the board which shorts this capacitor so that the module can be used with a DC signal such as when monitoring battery.

• Jumper OFF = Monitor AC voltage
• Jumper ON = Monitor DC voltage

The module can be powered off a wide voltage range of 3.5 to 12V

Module Connections

There is a 4-pin header on the assembly for making connections.

1 x 4 Header

• VCC = Connect to 3.5 to 12V
• IN = Input.  The voltage to be measured by the device
• GND = Ground.  There are 2 ground pins, but only one needs to be used
• GND = Ground.  There are 2 ground pins, but only one needs to be used

OUR EVALUATION RESULTS:

These modules work as advertised and can be useful for monitoring some types of voltages and are a very inexpensive way to experiment with VU meter type applications.

TECHNICAL SPECIFICATIONS