KA2284 Module Battery Level Indicator
EGP 60
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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 Maximum Ratings Vcc 3.5 – 12V IMax Maximum Current Draw Vcc < 50mA with all LEDs lit Operating Ratings IMax Max current draw on signal Input < 200uA Dimensions L x W (PCB) 28 x 21mm Datasheet KA2284
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