Wireless FM Emitting Circuit of 3000 Meters Launching Distance

Published:2011/6/22 4:51:00 Author:Michel | Keyword: 3000 Meters, Launching Distance, Wireless FM, Emitting Circuit | From:SeekIC

The work voltage and current are 9V and 2～6mA respectively and the element's parameters are shown as the aboved picture.BG1 is 9018,BG2 is C1959(It can be 9018 but the power is low.If the D-40 can spread the emitting distance to 1000m and it's hard to buy D-40 in shops).L1 and L2 are 0.5mm lacquered wires and the work voltage can be increased to 12V when we loope four and three circles on the 0.5 round bars.Thus the emitting distance can be increased but the frequency will change.At this time,it's better for the whole circuit uses battery charging to reach optimal results of quality and stable frequency and please turn off BG2 work and needed frequency when you start debugging and turn on BG2 circuit's adjustable power at last.



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