Recently get a long-distance remote control, so, first use the infrared remote control, increase the transmit power to 1W, 5W ...!
However, although it is far from being launched, it is almost impossible to illuminate the receiving head of only one centimeter. The farther the distance, the more prominent this problem. Don't ask! I have to find a "gunler"?
When you test it yourself, raise your hand ten times, there is no target in the target. Do not have a laser tube that is attached, lit together, this knows how far the deviation is! ----- long distance use, not good!
Then, change the idea, I hope to use many new radio transport modules in the market --- can reach more than 300 meters from the distance, a pair of modules will not be very cheap, and the principal cannot accept.
There is also a wireless module, a comparison of old-fashioned, DF315 emotion head, and super-survive reception, superheterodyne reception, etc. Supporting module. This module can only communicate one-way, but the price is relatively low. Even if the number can reach more than 3,000 meters. A pair of modules will not exceed 30 yuan. ----- use it!
So, I found out that I have used in the past, coupled with some new purchases, a lot of brands, rich variety:
The infrared remote control basic circuit does not need to have a big move, the schematic, remove the infrared launch tube, add the socket inserted into the wireless transmit module, change to the following:
Each home supply company transmit module, the order sequence is different, so three pins, there is a variety of arrangements. "Admire"! Therefore, you need to carefully see the character marks on the printing board when you use it. Don't insert an error!
Is that the module is the head? It is also considered that the infrared integrated receiving tube is removed, and the wireless receiving module is changed. The receiving module pin is the same as the transmit module, pay attention.
In this way, the infrared remote control will immediately become a radio remote control! ------ Transmit and received chip source code can be put into use now, you can put it immediately!
In this way, it is not necessary to operate "God * Hand", in the effective range (no need to be subject to the distance limit), you will follow it.
The "range" of an effective range is mainly determined by the transmit head. 100 meters to 3000 meters, it is a change to replace the emotion. Don't find an engineer, you can try it yourself!
Original link: https://www.eeboard.com/news/diy-6/
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