D1405 level indicating the application of the driver circuit

The D1405 level indicating driver IC uses five rod-shaped LEDs to indicate the input signal level. As shown in the figure, there is a constant current output device that can directly drive the LED, thus changing the current flowing through the LED when the power supply voltage is changed. It does not change. The circuit operates with a wide range of power supply voltages and can operate normally within 4.4~12V. The internal DC amplifier has an open-loop gain of >30DB. It can be changed according to the external resistor and capacitor of the 15th block of the integrated block. Response time. The amplifier has a high input impedance.

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D1405 for mono volume level indicating circuit application

D1405 level indicating the driving circuit for the application of the volume meter

Application circuit diagram of D1405 integrated circuit as DC level indicator

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