(Includes battery holder,
not shown in picture)
Low Power FM
The most powerful FM Transmitter circuit we've seen that operates on such low voltage
(just two AA cells). A range of 200 ft can be expected and, given a good antenna and FM
receiver, over 1/4 mile can be expected. An external power supply can be used up to 9 volts.
Transmits to the FM radio band, which means you can use any FM radio to receive
the transmitter. Teaches basics of FM transmitters. Microphone is included
- DIY Kit 7.
CK217 our longer range
version of this kit.
- L: 1-3/4" W: 3/4" H: 1/2"
- Requires 2 AA
batteries (holder included, not shown in pic.) 9 volt battery can be used
to increase range.
(or Use this
Power Supply instead of a Battery)
- FM Transmitter frequency is user
- Transmitter can be listened to on any FM radio.
CK200.pdf for complete
details, including schematic and theory of operation. Requires Adobe
Acrobat Reader available at