VMR6512 HIFI Audio Transmition Board
This is a simple board designed to demonstrate the basic function of V-Module’s HIFI Audio FM transmitter. It has a power connector, a stereo earphone jack and two buttons. Power supply is connected to the power connector, the voltage must be 2.7V-3.6V. The audio signal is input from the earphone jack. 2 buttons are used to adjust the working frequency of the board. Each time the UP/DOWN button is pressed, the working frequency will increase/decrease 0.1MHz. It’s extremely easy to build some garget like in-car MP3 transmitter or in-house audio transmitter with this small board.
* Supply voltage: 2.7-3.6v
* Working current: <40ma
* RF Power: 115dBuV
* Working frequency: 76.0-108.0MHz
* Transmitting range: >50m (open area, 75cm antenna, 100MHz)
* Board size: 46mm x 30.5mm x 18mm
* Weight: 12g
* Power Connector: 2.7-3.6V DC power input.
* Stereo Jack: 3.5mm jack, Stereo audio input.
* External Connector: external pins used to control the on-board VMR6512 by external controller.
* Button UP/DOWN: Buttons used to change the working frequency of the board. Each time they are pressed down the working frequency will increase/decrease
* Antenna pad: RF output. Simply connect a wire to this pad. Optimized length is 1/4 wave length of working frequency, for example, 75cm for 100.0MHz
* Default working frequency is 100.0MHz
* When up/down button are pressed simultaneously, the working frequency will be reset to 100.0MHz.
* Do Not power the board with voltage higher than 3.6V. If a li-on battery is used, an 1N4148 diode(or other silicon diodes) should be connected between the battery and the VCC pin of the power connector.
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- good sound quality Review by John
Quality Price Value
The sound quality is far better than my wireless headphone. Highly recommended! Flat rate shipping is a bit slow, express shipping is toooo expensive. (Posted on 9/1/11)
- Good product Review by Stefan
Quality Price Value
After 2 weeks waiting I got this board. It works perfect with a Li-ion battery. The transmitting range is more than 100 meter. Sound quality is excellent. I can't find much difference when the pre-epherise modified from 50us to 75us.
Overall it's an excellent product. It will be better if shipping could be faster. (Posted on 8/31/11)