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BN9 APPLICATION IDEAS:
1. High sensitivity listening device
Components required:
•
Small microphone such as RAMSEY MC1, mini-electret mike.
•
5K to 100K potentiometer for volume control.
•
10K resistor (brown-black-orange)
•
.01uf Ceramic capacitor
NOTE: To make a full-performance “big ear” listening system, use a snow coaster or large
plastic popcorn bowl. Mount the microphone in the center of the “focal-point” of the parabolic
bowl.
B N -9
F o c a l p o i n t
IN OUT
High gain BN-9