用分立(贴片)元件制作的调频发射电路
用分立(贴片)元件制作的调频发射电路
this smd fm transmitter has an operating frequency of about 80 to 115mhz. under reasonable circumstances you will be able to receive its signal at a distance of about 200 meters. although it is low-power, it might be illegal in your part of the planet.
here's the circuit:
depending on the electret microphone you use, you might have to tweek r4 to set the gain of the pre-amplifier. depending on the q of the lc-part (usually not very good when using off-the-shelf smd parts) you may also have to re-bias the end stage of the circuit. for the coil you can use a ecm45t series inductor.
you can download the pcb design here (only 2.5kb). it's a double-sided pcb in coreldraw 3.0 format (zip compressed).
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this smd fm transmitter has an operating frequency of about 80 to 115mhz. under reasonable circumstances you will be able to receive its signal at a distance of about 200 meters. although it is low-power, it might be illegal in your part of the planet.
here's the circuit:
depending on the electret microphone you use, you might have to tweek r4 to set the gain of the pre-amplifier. depending on the q of the lc-part (usually not very good when using off-the-shelf smd parts) you may also have to re-bias the end stage of the circuit. for the coil you can use a ecm45t series inductor.
you can download the pcb design here (only 2.5kb). it's a double-sided pcb in coreldraw 3.0 format (zip compressed).
NXP与Trusted Logic携手推出开源NFC And
几个方面来理解和掌握新型的MCU
武汉大学考察团来岳阳经开区调研智能制造与传感技术项目选址工作
身临其境体验天气的恐怖
Acrel-EIoT能源物联网云平台的结构及功能
用分立(贴片)元件制作的调频发射电路
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380v三相电机功率计算公式
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大电流弹片微针模组可解决摄像头的测试难点
奥宝科技推出最新一代的PCB Discovery AOI系列产品
全球首个有公民身份的机器人诞生于沙特
智能电网是电力和信息双向流动性的能量交换网络
特斯拉逐步废除免费充电服务，明年购买特斯拉的车主将不再享受免费充电服务
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实现连接成败的秘密IIoT成分
微软开始不再为Visual Basic编程语言添加新功能
光时域反射仪otdr牌子哪个好_价格如何
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