. Insert the pins of each component into the corresponding positions on the printed circuit board after being tinned. The pin of each component should be kept as short as possible. 2. Solder each component pin one by one. Solder joints should be small and smooth without virtual welding and false welding. When welding the coil, be careful not to deform the coil. 3. Use a 40-60 cm long multi-strand plastic leather cord as an antenna. One end is welded to the printed circuit board, and the other end is naturally extended.
A 10mhz crystal oscillator should be used, just right for a medium wave radio. A microphone is added to the positive electrode, and the negative electrode is directly connected to the crystal oscillator. Crystal oscillatorThe output end of the transformer is connected to a transformer (it is enough to wrap a enameled wire on the wire to be able to boost the voltage), and the output end of the transformer has two wires, one is connected to the antenna, and one is connected to the ground wire (can be connected to the negative battery electrode instead).
One battery, one wire. One end of the wire is connected to one pole of the battery, and the other end tries to touch the other pole of the battery, so that electromagnetic waves can be generated and can be received by the radio! Try it for yourself, and if you're right, take my answer.
Even if he made his own radio wave transmitter, and made a fruit battery from wild fruit, but that miniscule voltage and current would require many batteries to be connected and parallel to let the transmitterHe would have to have a bag full of wires, copper and zinc. Is that possible for a traveler? And this battery does not last, maybe his radio wave transmitter just work, before the distress signal is out of power, haha.If you use a Huawei mobile phone, you can optimize the battery life in the following ways: 1, EMUI X, or later: Go to Battery Settings and click Save Power. The system will automatically help you find the batteryTo some functions that may cause power consumption, you can manually choose to optimize. EMUI 10&Harmony OS: Go to the mobile Butler app, click on optimization, and optimize the power-saving Settings based on the results.
can be set to the phone power saving mode/low power mode (set battery power saving mode/low power mode); When the mobile phone network is poor, it is preferred to use WIFI (download the map of the required area in advance when using the map, and use offline mode); If the above solution does not help you, it is recommended that you back up your data in advance (QQ, wechat and other third-party applications need to be backed up separately) and go nearbyGet help from the service center.
View software power consumption: Enter the Settings - Battery - Power Consumption ranking to check whether there is software that is not commonly used but consumes a lot of power. If there is software that consumes abnormal power, uninstall the software or download and install it again from the app store. Check the mobile phone signal: Check whether the mobile phone signal is good and stable, if the signal is poor in the area, the phone will frequently search the network and consume more power. Check your phone Settings or app Settings and adjust them appropriately.
Please check whether the mobile phone signal is good and the stable signal is bad, the mobile phone will frequently search the network, resulting in consumptionMore power. Please adjust the software and device related Settings (1), play games, watch videos and live broadcasts, appropriately lower the screen brightness and volume, and appropriately reduce the picture quality and frame rate.
The mobile phone consumes power quickly, you can try the following methods: Off the screen to disable the application Settings: Setting method, select Settings, Power Saving Management, and Protected Background applications. Do not select applications marked with High Power consumption task and do not select other unnecessary background tasks. When the screen is off after setting, the power-consuming application is automatically stopped.
External environmental factors: Too low temperature will affect the battery performance and cause durabilityPrecision requirements, thermistors (PTC and NTC), pressure sensitive, humidity sensitive, light sensitive to environmental changes. Power mark: High-power conspicuous identification, small power (power expression) is subtle in whether it is marked.
Features: The transistor (referred to as the transistor) is a special device that contains two PN junctions inside and has the ability to amplify. It is divided into NPN type and PNP type two types, these two types of audion from the working characteristics can compensate for each other, the so-called OTL circuit in the tube is PNP type and NPN type pair use.
Electronic components are electronic components and electrical smallA component of a machine or instrument, which itself is often composed of a number of parts and can be common in similar products; Often refers to some parts of electrical appliances, radios, meters and other industries, such as capacitors, transistors, spring, spring and other sub-devices, common diodes and so on. In popular terms, the basic parts used to manufacture or assemble electronic machines can be called components, and components are independent individuals in electronic circuits.
Distinction between discrete components and integrated circuits/The two major branches of the semiconductor industry, integrated circuits and discrete devices, are the two major camps of electronic components. Discrete devices, such as diodes, tripolesThe tube is a single functional component, and the integrated circuit is the integration of many components in a single chip, achieving a high degree of integration and efficiency improvement.
Introduction to common electronic components Resistance Resistance in the circuit is represented by "R" plus a number, such as: R15 indicates the resistance numbered 15. The main functions of resistance in the circuit are shunt, current limiting, voltage division, bias, filtering (used in combination with capacitors) and impedance matching. Parameter identification: The unit of resistance is ohm (Ω), the unit of magnification is: thousand ohm (KΩ), megohm (MΩ) and so on.
A transistor is one of the basic components of a semiconductorone. It has the function of current amplification and is the core component of electronic circuit. A triode is made of two PN junctions very close to each other on a semiconductor substrate. The two PN junctions divide the bulk semiconductor into three parts, the middle part is the base region, and the two sides are the emitter region and the collector region, arranged as PNP and NPN. A transistor is usually represented in a circuit by "q" plus a number.