Chip (DIP8) Module K2 sirens

DIP-8 microchip with DC-Car encapsulation.

The K2 module provides two siren tones (Martin Horn) according to DIN 14610. You can switch between a sequence of low tones (road) and a sequence of high tones (city). There is also an automatic mixing mode.

The sound module is activated and deactivated with the output of the sound module of the DC-Car decoder, a 1KΩ resistor is required.

In the example scheme, the light output 2 manually alternates between both modes (road and city). And when activating light output 3 both modes alternate automatically. Any other constant light output can be used. If a flash type output is used, the CVs must be modified so that the output is continuous (without flickering).

If manual switching is not desired, the change can be made automatically by connecting the corresponding pins of the sound module with the negative cable.

PIN 1: (Not used)
PIN 2: (Not used)
PIN 3: Speaker +
PIN 4: Negative (feed)
PIN 5: Automatic tone switching (road/city)
PIN 6: Sequence start
PIN 7: Manual tone switching (road/city)
PIN 8: Positive (3'5 / 5 V DC)