Cleverly change the battery life, the soldering iron power circuit, the electric iron power change
Keywords: electric iron power supply
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Author: Ding Deqin
"Want to do good things, prostitutes". The author is drying the electronic, electrician for decades, knowing that there is a kind of tools that have a heart-sized tool to add wings, so as long as you encounter good tools, often do not hesitate to buy, use, repeatedly played, make me It is more loved. But only this electric iron, has not changed new changes for many years. Electronics, engineers often need meter measurement lines during repair, or organize components, or analyze faults. At this time, the soldering iron is still energized. In most cases, the soldering iron is very easy to oxidize, The tie is easy to corrode, the iron head, the core is not over, and the use of improper use will cause the iron head to burn, and often burn the soldering iron core. If you often unplug the plug, one is inserted Up to be too expensive; second, it is not convenient to use, waiting to be hot, it can be used, it is very unhappy. The author has moved its brain, such as a series of tandem half-wave rectification or the base of the soldering iron shelf, the use effect is not ideal for this author to make the iron iron multiple improvement, the latest determination makes a stepless pressure receiver Use the soldering iron, just adjust the high low of the output voltage, you can adjust the power of the soldering iron, and adjust the temperature of the soldering iron accordingly. It is necessary to weld the large element voltage to be higher, and the welding is contrary to the middle of the way. The author is grinding one by one in the use process; with a voltage meter as a viewing window, adjust the voltage to about 8 min, the temperature of the iron head is used, and the temperature of the solder wire can be melted, when the temperature is as high as a certain value Immediately placed the voltage regulator in about 150 V, working properly.
After using the practice, it has worked power on at 20:00 pm and at 20 o'clock in the morning, and it won't be burned the iron head and the soldering iron. After two years of use, the iron head, the core is still use, this method is simple and practical, and the temperature can be adjusted stepless, completely solve the condition of temperature over-high welding components, not only easy to save, energy saving .
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Circuit work principle
Bidirectional controllable silicon has a positive and anti-two directions that can control the feature. From the principal, the voltage polarity on the capacitor C1 is positive and negative at the power supply voltage through L, W to C1, so that this voltage reaches the on-voltage voltage of the two-way trigger diode VD, C1 passes R1, VD The control is discharged to the two-way thyristor Vs, so that the VS trigger is turned on, allowing the load to a certain high, low level. When the power supply voltage enters a negative half week, the VS is turned off, and C1 starts charging repeating the above process. Adjust the resistance value of the W potentiometer in the circuit, the time constant of W and C1 can be changed, thus obtaining the time to change the pulse, correspondingly changed the conduction angle of the two-way thyristor, thereby achieving the purpose of the required control, from The role of the electronic adjustment function. The circuit is compressed by C3, L, in order to prevent resonance waves from interference. R2, C2 is a protective circuit component of the thyristor.
R3 is a current limiting resistor. LED is a light emitting diode.
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Element selection and production
BX is a fuse, operating current 3 a, VS selection BCR3AM / 600V two-way thyristor, VD with two-way trigger diode, model DB3, or with NPN type silicon triode C, E pole series, B extremely suspended, replace trigger Diode. The capacitor is selected from the pressure of 630 V, and the capacity is selected according to the icon. The inductance L is used (φ1mm-shaped copper wire, in the medium wave antenna magnetic rod of 10 mm long to about 30 mm is 10% around 15 ~ 20 turns That is .ZL, Z2 is the use of special to the soldering iron plug. The V voltage meter requires the pointer to the O ~ 300 V model, preferably 85L17 series. Other allocated resistance value, the capacitance value is accurate. Installation The circuit printed plate is shown in Figure 2.
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Fig. 3 (omitted) is a good fitting physical map. The panel cover can be used to make panel caps with a 86-type open-installed junction box, and open the fixed knob, fuse, and power indicator, socket, voltmeter, and the like on the cartridge panel and both sides. It is also possible to make the open-mounted box with organic glass. Embed a two-eye and tripod socket on the side of the cartridge, the micro voltage meter U1, the potentiometer W, the fuse BX, the light emitting diode, etc. should be on the panel cover. If the two-way thyristor VS is selected, it is necessary to add a heat sink, which can be expanded, such as: high-power electric iron, rice cooker, hair dryer, motor speed, electric appliance, etc. This method is very practical! The reader may wish to make a try, and it is possible.
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