Follow WeChat Download Audiophile APP Follow the audiophile class related suggestion This article introduces the circuit diagram details of seven wireless microphones. The electronic component microphone (microphone) on the circuit board first turns the natural sound signal into an audio electrical signal, ... This article introduces the wireless microphone circuit design and schematic diagram. The wireless microphone circuit consists of a sound pickup circuit, a sound conversion circuit, a high frequency oscillator, and modulation ... This article introduces the circuit diagram of four 9018 wireless microphones. The wireless microphone is composed of several pocket transmitters (which can be installed in the pocket and the output power is about 0.0 ... The wireless microphone is composed of several pocket transmitters (which can be installed in the pocket and the output power is about 0.01W) and a centralized receiver. Each pocket sends ... The V segment does interfere with each other when multiple sets of wireless microphones are used. Of course, it cannot be said that the U segment does not, but it has a large extension range and can be adjusted as much as possible ... In today's era of extremely rich material products and extremely active cultural life, many enterprises and institutions have many entertainment or group activities. in... Every electronic lover has the experience of electronic production, from continuous failure at the beginning to gradual handy, the taste is beyond the reach of outsiders ... R1 in the circuit diagram of the enhanced wireless microphone is the bias resistance of the microphone MIC, generally selected in 2K-5.6K. R4 is the collector resistance. Give here ... This article introduces in detail more than a few representative low-power transmitters in the 88 ~ 108MHz FM broadcast range that are easy to make in amateur situations ... The microphone works with a single tube, and the working voltage only needs 1.5V. The frequency is tuned in the FM band of 88 ~ 108MHz, and the ordinary FM radio is used ... Recently, some film and television sound workers have conducted detailed practical tests on several wireless microphones commonly used in daily work. The pickup of wireless microphone not only involves the distance ... If your recorder has FM reception band, you may wish to make a wireless microphone yourself, which can add a lot of fun to your life. The frequency changes. When assembling, the lead of the component should be soldered as short as possible. The wireless microphone rod pointer introduced in this article combines the FM wireless microphone and the portable rod pointer, and cleverly uses the metal part of the pointer as a word. The production of several wireless microphone circuits This article introduces in detail the representative ones that are easy to make successfully in amateur situations ... The principle and circuit of KMW-306 channel wireless microphone KMW-306 wireless microphone is a cost-effective electroacoustic used in karaoke and other dance halls ... The principle of wireless microphone production: The electronic component microphone (microphone) on the circuit board first turns the natural sound signal into an audio electrical signal, which ... The use of NAND gates to make wireless microphones and circuit wireless microphones can be seen everywhere on the market, but without exception, all use LC oscillators or quartz crystals ... The wireless microphone circuit made by the NAND gate circuit is available everywhere on the market, but the circuit is made of lc oscillator or quartz crystal oscillator circuit ... How to choose a wireless microphone Overview Due to the progress of today's radio communication technology, the quality and function of wireless microphone products have been relatively improved ... High-performance dual-band wireless microphone receiving circuit diagram Circuit diagram of amplitude modulation wireless microphone The circuit is shown in the figure, IC1, C1 form a low-frequency oscillator around 400HZ; IC2 ... & The wireless microphone circuit has a reasonable design, beautiful and elegant shape, long sound transmission distance, long service life, long ... A few days ago, the price of a wireless microphone on the market was between 10 and 20 yuan. The microphone is adjusted ... The circuit is shown in the figure. This circuit uses Japanese NE ... Electricity '+ data.data.username +' '; dom + ='
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Push Button Food Blenders Push Button Food Blenders,Push Button Blender,Push Button Hand Blender,Push Button Mini Blender Flying Electronic Co., Ltd , https://www.flyingelectronic.com The circuit shown in Figure 1 can transmit audio signals to remote locations in a frequency-modulated (FM) manner. 
In the figure, VT1, R2, R3, C2, C3, L1, and Cx form a capacitive three-point frequency modulation oscillation circuit with a resonance frequency between 88MHz and 110MHz. The microphone B converts the sound signal into an electrical signal and sends it to the base of the triode VT1 through the coupling capacitor C1. At this time, the base voltage of VT1 will change with the change of the audio signal, so the collector capacitance of VT1 also changes accordingly, causing the oscillation frequency of the oscillator to change accordingly, to achieve the purpose of frequency modulation. The VT1 collector load L1, Cx, C3 and other tuning loops determine the oscillation frequency (ie, transmission frequency) of the high-frequency oscillator. Since the parameters of C3 and L1 are fixed values, the capacitor Cx is the oscillation frequency adjustment capacitor. Adjusting the capacitor Cx can Change the transmitting frequency of the transmitter, when the capacitance of Cx is 12.5pF, the transmitting frequency is about 108MHz.
The frequency-modulated signal containing the sound signal is output from the collector of VT1 and is transmitted into the air by the transmitting antenna. The antenna is connected to the collector of VT1, and the transmission effect is best when the length is about 690mm. 
The inductance of L1 is 0.17μH, if you can't buy the finished inductor, you can also wind it yourself. The inductance of the winding inductor is related to the diameter, length and number of turns of the coil bobbin, as shown in Figure 2. In the figure, r represents the radius of the skeleton (in mm), x represents the length of the coil after molding (in mm), n represents the number of turns of the coil, and the inductance is n2 × r2 / (228.6r + 254x) (μH) . According to the above method, the inductance L1 is wrapped with a φ0.1mm enameled wire on a round wooden rod with a diameter of 6.7mm for 5 to 6 turns, and then the tire is removed and the coil length is pulled to 6.4mm. 
![[Photo] upc1651 FM wireless microphone](http://i.bosscdn.com/blog/20/06/41/5205828958.jpg)
![[Photo] FM wireless microphone](http://i.bosscdn.com/blog/20/06/41/5204453888.gif)
![[Photo] Micro FM wireless microphone](http://i.bosscdn.com/blog/20/06/41/5204344874.gif)
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