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Item specifics
Product Description
modname=ckeditor
Full set of open source materials https://pan.baidu.com/s/1bZGE8GirseJ1iK3EtSubIA Extraction code：1234
Video tutorial：https://www.bilibili.com/video/BV1PU4y1b7uH/
【Product introduction】 CWThe code audio generator kit is a kit designed by the dream news agency module project team for amateur radio and electronic production enthusiasts。The kit uses a venturi bridgeRCOscillator as audio generation circuit，Then output to the on-board speaker or headset through the audio amplifier，The audio output volume and tone can be adjusted，A level switch output port is also provided for radio connection。The kit uses fully discrete components，Simple welding，Suitable for beginners of electronic welding。 【Principle interpretation】 The schematic diagram is in the relevant folder，Please check it yourself。 VD1Power supply indicator，On when powered on。TL431It is a three terminal integrated voltage stabilizing chip，Internal benchmark2.5V，Since the operational amplifier adopts single power supply，So the input needsVCC/2Voltage guarantee bias。RP1byRCRegulating end of oscillator，adjustRThe oscillation signal frequency can be changed。VD4Is a keyed indication，The key is connected to the power supply end of the oscillator，Press the key to power on the operational amplifier，After the oscillation is established, it is sent to the later stage for amplification。R4,R5,RP3Form a negative feedback regulation circuit，adjustRP3Adjustable operational amplifier gain，It is recommended to increase it appropriately when it can not afford oscillationRP3。VD2,VD3Amplitude stabilizing circuit，Ensure that the gain is not too large to cause waveform distortion。RP2Adjust for volume，LM386Be responsible for amplifying the oscillation signal，C8Signal output capacitance。S8050Be responsible for converting the signal of the switch into a signal that can be recognized by the radio station。The output is a square wave，When the key is pressed, it is low，Release the key is high。Check after welding2.5VIs the terminal correct，Whether the indicator light is normal when the key is pressed。In the default state, the horn will have a slight background noise，It's normal。 【Welding instructions】 1. Refer to the original list，Check the original device。Prepare electric soldering iron、Solder wire、Multimeter and other tools。The structure of this kit is relatively simple，All components can be welded before power on test。 2. Welding is performed in the order of device height from low to high，Suggested order：resistance->diode->Electrodeless capacitance->Voltage stabilizing tube->LED- >Electrolytic capacitor->chip->speaker->Other devices。 3. resistance：There is no direction requirement for welding，Pay attention to distinguish the resistance value by color ring。 4. diode：The model number is written on the device cover，Welding has direction requirements，The cross bar part of the device is the direction of the negative electrode，Corresponding to the direction of the small horizontal bar of the circuit board。 5. Electrodeless capacitance：There is no direction requirement for welding，Pay attention to distinguish the capacitance value according to the marked number。for example104representative0.1uF 6. Switching diode：The model number is written on the front of the device，There are direction requirements during welding。The cross bar part of the device is the direction of the negative electrode，Corresponding to the direction of the small horizontal bar of the circuit board。 7. LED：Welding has direction requirements，The short side of the metal pin is the negative electrode。It is recommended to cut the feet first during welding。 8. Electrolytic capacitor：The model number is written on the device cover，Polarity requirements during welding，The direction of the device with white bar is negative，Circuit board The direction with white shadow is negative。 9. chip：The model number is written on the device surface，Welding has direction requirements，First weldingICSeat，Reinsert chip，The end with the direction mark on the circuit board is aligned with the mark on the chip。TL431and8050Pay attention to distinguish。 10. speaker：Welding has direction requirements，Align the plus marks of components and circuit boards。Pay attention to the positive and negative poles 11. Other devices：DCPower supply base、3.5mm Stereo socket、Variable resistance、copper pillar。 【matters needing attention】 1. This kit is for connecting keys6.35mmFront end of audio interface（Left vocal tract）Connected to keying，Last end（Grounding terminal）Grounding。Only suitable for manual key connection，There is no automatic key tapping function。 2. Audio output is optional，On board speaker sounds without headphones plugged in，The speakers turn off automatically when the headphones are plugged in。 3. The input voltage is5V，Recommended useUSBpower supply。If the input voltage is too high, the components may be damaged。 4. This product is used asDIYKit，The principle of the circuit is tested by actual welding，However, there is no guarantee that each user will not have problems during welding and use，If the user fails in use，The club cannot provide troubleshooting services。 【Special function description】 The switch interface is suitable for connecting the kit board to a radio station or a computer，It is recommended to confirm the supply voltage when connecting。The signal of the kit is that the falling edge is a keyed signal。 
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