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diy k28 |
Sound Activated FM
Transmitter Kit
Sound turns on the transmitter, which operates in the FM radio band. The volume of sound needed to trigger
the circuit is adjustable. Great for a baby monitor. The two stage transmitter has good range and the circuit powers
down unless it hears sounds; reactivates with a sound. Operates on two double AA
batteries (use a 9 volt to increase range) DIY Kit 28.
Specifications:
See
CK205sch.pdf for schematic
details. Requires adobe acrobat reader available at
www.adobe.com
for free!
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