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f-alpha.net » Electronics » Digital Electronics » Multiplexer » Let's go... » Experiment 8 - Analog Switch

Experiment 8 - Analog signal at a bilateral switch

Take a look at the circuit shown...

Circuit diagram analog signals at a bilateral switch.

In the case of a closed switch the voltage at the potentiometer P1 is passed to the transistor T1. With the LED you realize that the signal can be adjusted continuously...

Circuit analog signals at a bilateral switch. (Enlarge)

In the case of an open switch, the resistor R3 prevents the base of the transistor T1 to "float".

In this way, you are able to switch analog voltages with the bilateral switch capable...

In the next experiment you look at a 2-to-1 multiplexer that can switch analog signals...

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