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Item: 315825694515

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Type:DIY FM Radio Electronic Kit
Battery not include:Battery not include
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eBay Categories DIY FM Radio Electronic Kit Adjustable Frequency 150Hz-20KHz Soldering Project Description Features 1、Using high-quality materials, transparent plastic shell, double-sided epoxy circuit board, simple operation, easy welding. 2、With radio module, with noise elimination, bass enhancement, high sensitivity, low noise, strong anti-interference ability and other advantages. 3, key adjustment, switch channel volume up and down, clear all channels and re-search and save the station. 4, a variety of specifications can be selected, simple version without digital display, with digital display version, with digital display with charging module models can be selected according to need. 5、Wide range of application, suitable for school teaching, cultivate interest, scientific research and development, DIY enthusiasts. Specification Material: transparent plastic shell, double-sided epoxy circuit boards Name: FM radio production kit Control chip: RDA5807 8002D (STC81K17 digital display version) Power supply: 3 7 batteries, 3.7V lithium batteries need to be provided Speaker: 1.5-inch 4 ohm 3W speaker (OD 40mm) Search range: 50-108 MHz Signal-to-noise ratio: >60dB Sensitivity: <10uV Frequency Response: 150Hz-20KHz Product size:115*70*28mm Distinction: 1、Digital display version of the bulk - with shell: a set of bulk delivery with a shell, can display the radio frequency, need to provide their own power supply of 3 section 7 batteries. 2、Simple version of the loose parts - with shell: a set of loose parts with shell delivery, can not display the radio frequency, need to prepare their own power supply of three 7 batteries. 3、Digital display version loose parts - with shell with - charging module: a set of loose parts with shell delivery, with charging module, with charging cable, with lanyard, you can add their own lithium battery, can display the radio frequency, need to prepare their own lithium batteries or 3 section of No. 7 batteries. Instructions for use 1, power supply: upward dial to connect the battery power supply; downward dial to connect the MICRO USB power supply. 2, after power on the indicator light, and rustling sound, then you can pull open the antenna tuning. [If the indicator light is on and there is no sound, you can disconnect the power and wait for about half a minute before powering on again.] 3、Select station:Press CH+ to select the next station,press CH- to select the previous station. [Selection of stations at the same time in the search for stations, need to wait patiently.] 4、Volume Adjustment:Press V to reduce the volume, press V+ to increase the volume. 5, headphone use:Insert the headphone head into the headphone port, the sound will be played from the headphone. [Kit does not come with headphones]. 6, Search for stations and use to stretch the antenna to find the right direction, places with a lot of buildings or remote mountainous areas, the radio station will be less or can not be searched. Welding method: 1, solder wire selection requirements:Diameter 0.8-1mm melting point of 183 degrees or so, please do not use high melting point solder. 2, circuit iron selection requirements: 30-40W 3, keep the iron head clean: iron head surface oxidation of a layer of black impurities to form a heat insulation layer, so that the iron head to lose the role of heating. 4, the welding steps as follows: for general welding point about 2-3 seconds to complete the welding. Please follow the welding requirements strictly. 1、Please check the quantity and model of accessories first. Try to measure with a multimeter if you can. 2、According to the tutorial steps to install. 3、When installing, install the short component first then install the tall component. 4、Every time you install a part of the components, weld a part of the components, and promptly cut off the component pins. 5, welding, pay attention to the welding temperature can not be too high, welding time can not be too long, otherwise it will damage the circuit board or damage components. 6, after welding again to check whether the solder joints are qualified, whether the components are installed incorrectly. 7, power commissioning, pay attention to the power supply positive and negative can not be reversed. Voltage can not exceed 3V. 8, with screws to fix the shell, pay attention to the screws tighten on the line, can not be over-tightened. 9, if there is a failure, first determine whether the power supply is correct, and then check the component installation and solder joints. List: 1 x Radio kit (DIY loose parts, need to solder by yourself.) DIY FM Radio Electronic Kit Adjustable Frequency 150Hz-20KHz Soldering Project Description Features 1、Using high-quality materials, transparent plastic shell, double-sided epoxy circuit board, simple operation, easy welding. 2、With radio module, with noise elimination, bass enhancement, high sensitivity, low noise, strong anti-interference ability and other advantages. 3, key adjustment, switch channel volume up and down, clear all channels and re-search and save the station. 4, a variety of specifications can be selected, simple version without digital display, with digital display version, with digital display with charging module models can be selected according to need. 5、Wide range of application, suitable for school teaching, cultivate interest, scientific research and development, DIY enthusiasts. Specification Material: transparent plastic shell, double-sided epoxy circuit boards Name: FM radio production kit Control chip: RDA5807 8002D (STC81K17 digital display version) Power supply: 3 7 batteries, 3.7V lithium batteries need to be provided Speaker: 1.5-inch 4 ohm 3W speaker (OD 40mm) Search range: 50-108 MHz Signal-to-noise ratio: >60dB Sensitivity: <10uV Frequency Response: 150Hz-20KHz Product size:115*70*28mm Distinction: 1、Digital display version of the bulk - with shell: a set of bulk delivery with a shell, can display the radio frequency, need to provide their own power supply of 3 section 7 batteries. 2、Simple version of the loose parts - with shell: a set of loose parts with shell delivery, can not display the radio frequency, need to prepare their own power supply of three 7 batteries. 3、Digital display version loose parts - with shell with - charging module: a set of loose parts with shell delivery, with charging module, with charging cable, with lanyard, you can add their own lithium battery, can display the radio frequency, need to prepare their own lithium batteries or 3 section of No. 7 batteries. Instructions for use 1, power supply: upward dial to connect the battery power supply; downward dial to connect the MICRO USB power supply. 2, after power on the indicator light, and rustling sound, then you can pull open the antenna tuning. [If the indicator light is on and there is no sound, you can disconnect the power and wait for about half a minute before powering on again.] 3、Select station:Press CH+ to select the next station,press CH- to select the previous station. [Selection of stations at the same time in the search for stations, need to wait patiently.] 4、Volume Adjustment:Press V to reduce the volume, press V+ to increase the volume. 5, headphone use:Insert the headphone head into the headphone port, the sound will be played from the headphone. [Kit does not come with headphones]. 6, Search for stations and use to stretch the antenna to find the right direction, places with a lot of buildings or remote mountainous areas, the radio station will be less or can not be searched. Welding method: 1, solder wire selection requirements:Diameter 0.8-1mm melting point of 183 degrees or so, please do not use high melting point solder. 2, circuit iron selection requirements: 30-40W 3, keep the iron head clean: iron head surface oxidation of a layer of black impurities to form a heat insulation layer, so that the iron head to lose the role of heating. 4, the welding steps as follows: for general welding point about 2-3 seconds to complete the welding. Please follow the welding requirements strictly. 1、Please check the quantity and model of accessories first. Try to measure with a multimeter if you can. 2、According to the tutorial steps to install. 3、When installing, install the short component first then install the tall component. 4、Every time you install a part of the components, weld a part of the components, and promptly cut off the component pins. 5, welding, pay attention to the welding temperature can not be too high, welding time can not be too long, otherwise it will damage the circuit board or damage components. 6, after welding again to check whether the solder joints are qualified, whether the components are installed incorrectly. 7, power commissioning, pay attention to the power supply positive and negative can not be reversed. Voltage can not exceed 3V. 8, with screws to fix the shell, pay attention to the screws tighten on the line, can not be over-tightened. 9, if there is a failure, first determine whether the power supply is correct, and then check the component installation and solder joints. List: 1 x Radio kit (DIY loose parts, need to solder by yourself.)

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