Connecting a high impedance source to a low impedance load can be achieved using a common collector configuration.

Common Collector Configuration:
The common collector configuration, also known as an emitter follower, is a type of transistor amplifier configuration. It consists of a transistor with its emitter terminal connected to the input source, its collector terminal connected to the output load, and its base terminal connected to the biasing circuit.

Advantages of Common Collector Configuration:
1. High input impedance: The input impedance of the common collector configuration is high, which allows it to effectively interface with high impedance sources.
2. Low output impedance: The output impedance of the common collector configuration is low, enabling it to drive low impedance loads.
3. Voltage gain less than unity: The voltage gain of the common collector configuration is slightly less than unity, which means it provides very little amplification. This characteristic is beneficial when connecting a high impedance source to a low impedance load because it avoids excessive signal amplification, maintaining signal integrity.

Connecting High Impedance Source to Low Impedance Load:
When connecting a high impedance source to a low impedance load, such as a sensor or a microphone to a speaker, the common collector configuration is suitable. The high input impedance of the common collector configuration allows it to receive the signal from the high impedance source without loading it significantly. The low output impedance of the common collector configuration ensures that the signal can be effectively transferred to the low impedance load without significant signal loss.

In this configuration, the base terminal of the transistor is biased properly to ensure that it operates in the active region. The biasing circuit provides a stable bias voltage to the base terminal to keep the transistor in the active region.

Conclusion:
In summary, the common collector configuration, or emitter follower, is the appropriate configuration to connect a high impedance source to a low impedance load. It provides high input impedance, low output impedance, and a voltage gain slightly less than unity, making it suitable for interfacing between different impedance levels while maintaining signal integrity.