Electronic DIY Component Identification Teaching Soldering Practice Training FM Radio Kit Parts

Product introduction: The circuit part consists of a radio circuit board and a display circuit board; all electronic components on the radio circuit board use direct plug-in packaging structure. The radio demodulation chip CD2003GP and audio power amplification chip TDA2822 are both DIP dual-row direct plug-in packaging, suitable for beginners' manual soldering. The display circuit board chip SC3610D uses a simple dual-column patch package, which can display the clock, set the alarm clock (scheduled power on), and display the radio station frequency.Beginners choose pre-soldered display circuit modules; those with professional tools and guidance can choose component parts for the display circuit board section. Product Parameters: Dimensions: 120mm×76mm×26mm LCD Display: 52mm×34mm Frequency Range: 72MHz~108.6MHz Intermediate Frequency: 10.7MHz Power Supply: 3V (2 cells 5V)#Battery) Output power: 180mW

Assembly Preparation Welding Practice: Use an electric soldering iron regularly by dipping it in rosin and adding solder. After heating, there should be a layer of shiny solder on the soldering iron tip to form a tin bridge during welding for quick heat transfer and easy soldering; Second, simultaneously heat the connection between the component pin and the solder pad for 3 to 10 seconds; Third, provide an appropriate amount of solder; Fourth, evacuate the solder wire; Fifth, continue heating for 2 to 3 seconds before evacuating the soldering iron, ensuring to evacuate in the direction of the pin to avoid forming bad burrs and pointed solder joints. Shape of solder joints and correction methods (very important)

1. Correct solder joints should be smooth like small hills with a height of 0.5mm-1mm; 2. Incorrect solder joints have too much solder and empty spaces in between; the correction method is to clean the soldering iron tip in rosin, keep a small amount of rosin, quickly heat the solder joints, and remove excess solder. 3. Incorrect solder joints, component wires not sticking out; the correction method is to replace components. 4. Incorrect solder joints, semi-soldered joints, and easy desoldering due to vibration; the correction method is to dip in rosin and add solder to re-solder. 5. Incorrect solder joints will cause a small spike when the soldering iron is removed; the correction method is to dip in rosin and reheat for resoldering.Retreat along the direction of the pin. 6. Incorrect solder joints, such as oil droplets on the joints, not soldered to the pads.The correction method is to use a soldering iron dipped in solder to clean the solder pads and re-solder them; you can also re-solder with rosin. Removing Components After Incorrect Soldering and Repairing the Solder Pad 1. Use a soldering iron to heat up the solder on the component pins to melt it, then use tweezers to remove the component; 2. Choose a suitable medical hollow needle for desoldering, provided that the steel file smoothes the needle tip; 3. Use thin copper wire or shielding wire mesh desoldering materials; 4. Use a soldering iron or desoldering tool for desoldering; 5. If you need to remove solder from the solder pad holes, use a specialized soldering iron or desoldering tool; alternatively, use a needle to remove solder by heating with a soldering iron while unclogging the solder pad holes.You can also use fine copper wire or shielding wire braided mesh for desoldering materials

Installation and Welding Radio component installation mainly relies on soldering, which not only secures the components but also ensures circuit continuity.The quality of the soldering process will directly affect the quality of the radio.Poor welding can cause damage to components, loose solder joints,虚焊 and short circuits, or noise caused by poor contact. Installation technical requirements 1. Components must be tightly welded to the circuit board. 2. The distribution of components on the printed circuit board should be as uniform and neat as possible. 3. The installation order is usually from low to high, from light to heavy, from easy to difficult, from general components to special components. 4. The printed circuit board should be kept clean. Do not touch the pads on the circuit board with sweaty hands to avoid oxidation and rusting of the pads, causing difficulty in soldering and false soldering. 5. Pay special attention to welding special components such as polarity, direction, volume, fragility, and high temperature resistance. Be careful and make no mistakes.

1. Correct solder joints should be smooth like small hills with a height of 0.5mm-1mm; 2. Incorrect solder joints have too much solder and empty spaces in between; the correction method is to clean the soldering iron tip in rosin, keep a small amount of rosin, quickly heat the solder joints, and remove excess solder. 3. Incorrect solder joints, component wires not sticking out; the correction method is to replace components. 4. Incorrect solder joints, semi-soldered joints, and easy desoldering due to vibration; the correction method is to dip in rosin and add solder to re-solder. 5. Incorrect solder joints will cause a small spike when the soldering iron is removed; the correction method is to dip in rosin and reheat for resoldering.Retreat along the direction of the pin. 6. Incorrect solder joints, such as oil droplets on the joints, not soldered to the pads.The correction method is to use a soldering iron dipped in solder to clean the solder pads and re-solder them; you can also re-solder with rosin. Removing Components After Incorrect Soldering and Repairing the Solder Pad 1. Use a soldering iron to heat up the solder on the component pins to melt it, then use tweezers to remove the component; 2. Choose a suitable medical hollow needle for desoldering, provided that the steel file smoothes the needle tip; 3. Use thin copper wire or shielding wire mesh desoldering materials; 4. Use a soldering iron or desoldering tool for desoldering; 5. If you need to remove solder from the solder pad holes, use a specialized soldering iron or desoldering tool; alternatively, use a needle to remove solder by heating with a soldering iron while unclogging the solder pad holes.You can also use fine copper wire or shielding wire braided mesh for desoldering materials

Installation and Welding Radio component installation mainly relies on soldering, which not only secures the components but also ensures circuit continuity.The quality of the soldering process will directly affect the quality of the radio.Poor welding can cause damage to components, loose solder joints,虚焊 and short circuits, or noise caused by poor contact. Installation technical requirements 1. Components must be tightly welded to the circuit board. 2. The distribution of components on the printed circuit board should be as uniform and neat as possible. 3. The installation order is usually from low to high, from light to heavy, from easy to difficult, from general components to special components. 4. The printed circuit board should be kept clean. Do not touch the pads on the circuit board with sweaty hands to avoid oxidation and rusting of the pads, causing difficulty in soldering and false soldering. 5. Pay special attention to welding special components such as polarity, direction, volume, fragility, and high temperature resistance. Be careful and make no mistakes.