There are many forms of wireless transmission circuits using acoustic meter resonators. Here is another circuit. This circuit was made after I referred to the article in the electronic newspaper three years ago and combined with the actual sample of the module introduced in the article. After mass production, some parameters have been improved, and now this product is really very good. But now there are too many imitation products of this kind, and the quality varies greatly, but because it is relatively simple, I think it is still necessary to get it out for everyone. I have found many similar circuit diagrams on the Internet, but Some of them are trapped. I hope everyone should pay attention to learn to identify some bugs by themselves. For this module, I have not tested the absolute power of its wireless transmission, but we drove the car over the distance on the highway. It cooperates with the ordinary 315M super regenerative receiving module to reach a distance of 800 meters, although my circuit As long as the value of the 8050 base resistance is reduced, the communication distance will be increased to 1200 meters or even farther, but after a lot of experiments have proved that it is not very reliable, the reason is not very clear to me, there may be two reasons, one It is 8050 that when R2 is small, there is a slight turn-on, which causes the transmission cannot be quickly cut off. Another is that R2 is very small, the 8050 turn-on current is relatively large, it may be a disturbance to the power supply, but can not meet the start-up requirements. I once doubted whether my circuit was a good match, so I bought a lot of similar modules named 1500 meters, and found that they also have the same unreliability, which is generally manifested as occasional vibration or baud rate less than 2K. Later, I increased the R2 resistance. When it is greater than 15K, the emission has been normal, and the distance is about the same as 27K, so I use this resistance now. For the L1L2 here, I use a 0.8mm drilled enameled wire with a 3mm drill It's made from 4 rounds and half-born ? |
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Feed Through Terminal Block Section
Feed Through Terminal Block.
In the electrotechnics, the terminal refers to the terminal and is designed to run through the terminal production. The type is divided into single hole, double hole, socket, hook, etc. from the material, copper silver plating, copper zinc plating, copper, aluminum, iron, etc. their functions are mainly to transmit electrical signals or conduct electricity. The unit of terminal block is "bit", and one wiring bit is "bit". Usually the so-called table is the serial number of the terminal, which has different definitions in different applications. "Jie" and "bit" have the same meaning, but they are called differently. Groups are made up of sections.
Feed Through Terminal Block
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