Mini FM short range transmitter module

Description

Transmission range: 10-20 meters

This is one of the simplest, cheapest, and smallest FM transmitters we have ever experimented with. It works with just one transistor.  It comes fully assembled. It is not a DIY kit. You just need to connect a battery holder and an antenna. You can adjust the frequency too.

Features:

• Operating voltage range [1.5-5V]
• Operating current [6-30mA]
• Frequency range [88-108MHZ]
• Transmission range [3-20 m]. The transmission range can be influenced by a number of factors, such as the length of the antenna, weather conditions, quality of the FM receiver, and battery power.
• Frequency regulation [adjustable]
• Interference frequency stability [poor]
• MIC sensitivity [0.3 m]
• Sound [General]
• PCB size] [1.9 * 3.2CM]

Note: This transmitter is less stable and there can be easy frequency drift.

What do you need to arrange yourself?

The package includes only the assembled transmitter. You need to purchase a battery holder and find a 20-30cm wire.

How to test?

Solder a 20-30 wire antenna. Power up the transmitter using a 1.5V-5V battery. Tune the FM radio until you hear a feedback noise. Then, you can play music from your mobile phone, place the transmitter there and take your FM receiver away from the transmitter. You should be able to hear the music up to a distance of 10-20cm.

Watch the video below: