C high-power long-distance wireless microphone module:
The module is made of a high-frequency power amplifier on the basis of the A model. Because of the large power, it is necessary to match the better antenna to exert its power. It is recommended to solder directly to the board with a 75cm rod antenna or a 1mm thick enameled wire.
Product Parameters:
Dimensions: 25*10mm
Working voltage: 2V-5V (mobile power can be used, but with regulated power supply, mobile phone charger may have AC noise, if the voltage is too high, it will burn the launch tube)
Working current: 30-80mA (measured input working current: 4.8V-87mA, 3.6V-63mA, 2.4V-36mA, test 80cm wire for the antenna, respectively, using four, three, two BPI2100mah nickel-metal hydride rechargeable battery test)
Transmitting frequency: 80-110MHz (complete coverage of home FM radio frequency)
Transmitting power: 150mw (C models), 50 meters - 800 meters (depending on the antenna efficiency determines the distance)
Receiving method: ordinary household FM radio receiving. The FM radio that comes with the phone can also be received, but the Internet app that the software APP requires network traffic cannot be used. We have a matching radio for sale.
Emission distance: The linear transmission distance of the obstacles can reach 800 meters or more (6V power supply, 80cm professional antenna, Desheng PL606 high sensitivity radio test results, if the common antenna or the obstacle group environment test in the building group, the distance will be shortened)
Product advantages:
1. Onboard microphone with external audio input (mono)
2. The input microphone and audio sensitivity are adjustable, and the transmission frequency is continuously adjustable.
3. Transmitting power: 5v input can reach 150mw transmitting power, and the space is more than 300 meters!
4. All imported components, stable operation, frequency does not drift, hand touch antenna does not drift.
5. Broadband modulation, super good sound quality, comparable to FM radio station sound quality.
Precautions:
1, fever description:
If the module is hot, it means that the antenna is not very well matched. Some of the transmitted power cannot be transmitted through the antenna. It becomes heat and will make the board hot. When this situation is found, it is necessary to consider adjusting the antenna.
2. Antenna design:
(1) The antenna determines the transmission distance. A good antenna can transmit hundreds of times more than a few times more than a poor antenna.
(2) It is recommended to use 75-80 cm long, 0.5-1 mm diameter enameled wire, directly soldered to the transmitting antenna pad on the circuit board, straightened and used vertically, the effect is better.
(3) If the distance requirement is not high, but you want to be more subtle, you can use ordinary wires, which is shorter, but it will reduce the launch distance. Please test it yourself.
3, battery life:
Many customers ask this question, you can calculate it yourself, the battery is different, the capacity is different, and the module works different time. Calculated as follows:
5v power supply - use time (hours) = battery capacity (mah) divided by 85ma
3.7v power supply - usage time (hours) = battery capacity (mah) divided by 63ma
E.g:
How long does a Samsung 2600mah 18650 lithium battery (3.7V) give power to this module?
2600mah divided by 63ma = 41.2 hours, about 41 hours, it is very power saving