如何制作单晶体管FM接收机（英文）Build A One T
如何制作单晶体管fm接收机（英文）build a one transistor fm radio
schematic diagram for the original one transistor fm radio
click here for a pdf version of the schematic. you can also make this into a simple cb radio receiver. see this pdf file.
schematic diagram for the one transistor fm radio with improved audio gain
click here for a pdf version of the schematic.
one transistor fm radio with improved audio gain.
printed circuit board
some wiring notes:
unless you have experience with super-regenerative radios, i highly recommend using the far circuits printed circuit board.
connect the two sections of the variable capacitor (c3) in series to linearize the tuning somewhat. that is, use the connections on either end of c3 and don’t use the middle lead.
l2, the rf choke should not be near a ground. the same is true for l1. capacitance to ground will disturb the feedback.
the gain is just enough to drive an earphone. if you live too far away from radio stations, you might have trouble hearing one. there is no option here for an external antenna (that would require and extra transistor).
you can drive a speaker if you add an external audio amplifier.
if you want a little more audio gain, or you cannot locate a tl431clp chip, you can use some other audio amplifier in the circuit where pins 1 and 2 of d1 normally connect. you can use an lm386 or a tda7052 audio amplifier. quasar diy project kit #3027 is a complete tda7052 audio amplifier kit and it works fine in this application.
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如何制作单晶体管FM接收机（英文）Build A One T
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schematic diagram for the original one transistor fm radio
click here for a pdf version of the schematic. you can also make this into a simple cb radio receiver. see this pdf file.
schematic diagram for the one transistor fm radio with improved audio gain
click here for a pdf version of the schematic.
one transistor fm radio with improved audio gain.
printed circuit board
some wiring notes:
unless you have experience with super-regenerative radios, i highly recommend using the far circuits printed circuit board.
connect the two sections of the variable capacitor (c3) in series to linearize the tuning somewhat. that is, use the connections on either end of c3 and don’t use the middle lead.
l2, the rf choke should not be near a ground. the same is true for l1. capacitance to ground will disturb the feedback.
the gain is just enough to drive an earphone. if you live too far away from radio stations, you might have trouble hearing one. there is no option here for an external antenna (that would require and extra transistor).
you can drive a speaker if you add an external audio amplifier.
if you want a little more audio gain, or you cannot locate a tl431clp chip, you can use some other audio amplifier in the circuit where pins 1 and 2 of d1 normally connect. you can use an lm386 or a tda7052 audio amplifier. quasar diy project kit #3027 is a complete tda7052 audio amplifier kit and it works fine in this application.
工业机器人常用的几种编程语言
给MCU工程师详解FPGA硬件属性
Intel10nm工艺和7nm工艺对比结果 处理器差距有多大?
语音数据集在智能驾驶中的价值与应用
苹果公布iOS11要来了！还会像iOS10一样卡吗？
如何制作单晶体管FM接收机（英文）Build A One T
工信部通报63款APP，腾讯京东均上榜
5G技术推进下 智能安防将取得快速发展
苹果iPhone SE 2订单交付日期延期至二季度 首批备货将减少
软启动器的电气控制线路分享
电池保护器能否延长电池寿命呢
广东电网公司迎峰度夏主打“科技牌”
语音芯片在烘干机中的应用：提升用户体验与产品智能化
超九成机器人企业未来五年或将洗牌
专业检测机构对“REACH”法规的评议意见
小米6什么时候上市？小米6配置曝光，小米6外观惊艳配置残暴已确定，小米手机超给力更新太无敌
小白也想修改美化音频？你可以试试Audacity音频编辑工具
变频器供电条件下感应电动机的温升问题剖析
详谈电连接器端接的分类、优势及工艺要求
海光3号CPU带动海光信息业绩快速增长