KA2284 level indicator

LED indicator of signal/charge level KA2284 is intended for LED indication of the level of an alternating analog signal (indication of tuner setting, indication of signal level at the line output, indication of output power, power indicator, indication of the charge level of accumulators or batteries, etc.). The indicator is perfect for the Pirate metal detector and other similar devices that have a sound indication, but do not have a light one.

Depending on the signal level, the LEDs D1 - D3 (green), D4 (yellow), D5 (red) will light up, respectively D1 - D3 low or normal signal level, D4 - threshold level, D5 - maximum.

To adjust the signal level on the indicator board there is a trimming resistor RP1. Also on the indicator board there is a jumper P2, by removing which, you can switch the board to the AC mode. The KA2284 LED signal/charge indicator has one 4-pin male connector, with a pin spacing of 2.54 mm. The indicator can be powered from any DC source with a voltage of 3.5 - 15 V.

Specifications:
supply voltage: 3.5 - 15 V;
quiescent current: 7 - 10 mA;
output current: 7 - 10 mA;
minimum input voltage: 50 mV;
frequency range: 20 - 20000 Hz;
indication range: 18 - 20 dB;
dimensions (L x W x H): 28 x 21 x 12 mm.