CDxx-dat

• CDxx-dat - 74xx-dat - LMxx-dat

• 4161 (4-Bit Synchronous Counter): Acts as the Binary Address Generator. It receives pulses from the NE555 and counts from 0 to 15 in binary ($0000$ to $1111$).

• 4067 (16-Channel Analog Multiplexer): Acts as the Electronic Switch. It uses the 4-bit address from the 4161 to connect a "Common" pin to one of 16 different input/output channels.

• CD4067-dat

apps

• Analog Step Sequencer: Used in modular synthesizers to cycle through 16 different voltages (set by potentiometers) to create a musical melody.

Logic Flow

1. Clocking: The NE555 triggers the CLK pin of the 4161.
2. Counting: The 4161 outputs a 4-bit binary number ($Q_A, Q_B, Q_C, Q_D$).
3. Addressing: Those 4 pins connect to the Address pins ($S_0, S_1, S_2, S_3$) of the 4067.
4. Switching: The 4067 opens the specific channel corresponding to that binary number.

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