Teach you how to quickly make an energy-saving and practical soldering iron

As an electronic hobbyist, there is always a handy tool in the production of electronic products - electric iron. Are you troubled by the fact that your "ironing iron" is often oxidized? I want to answer yes! There are constant temperature soldering irons on the market, but the price is expensive, which is more than ten times that of ordinary electric soldering iron. Once broken, the parts are difficult. Match, can only be used, not worth it!

Then you want to have a soldering iron with a long-life soldering iron, simple and affordable, convenient and safe? In fact, this is very easy to achieve, we only need to improve on the basis of the original ordinary soldering iron.

The role of components:

Rectifier diode (1N4007): 220V AC half-wave rectified into pulsating DC power of about 100V.

Zener diode (1N4727): protects the light-emitting diode, so that the light-emitting diode maintains the working voltage at both ends and normally emits light; if it is not connected, the working time is long, and the LED will burn out because the voltage at both ends is too high.

Light-emitting diode (LED): Indicates whether the circuit is in a soldered state or in a soldered state.

Normally closed switch (SB): The state of the switching circuit. When the circuit is normally closed, the circuit is in the welding state. When the circuit is off, the circuit is in the state to be welded.

Circuit characteristics:

1, longevity and power saving. In the welding state, 220V AC is all added to the soldering iron core, so that the soldering iron is in a good welding state; less than half of the voltage is added to the soldering iron core in the state of soldering, not only to avoid the soldering iron tip being oxidized, but also to keep the soldering iron in the pre-prevention The hot state (it has been proved that the soldering iron in the preheating state can be in a welded state when it is picked up, which does not affect the use effect), and has longevity and power saving.

2, simple and affordable. The "energy-saving" soldering iron can be realized by adding four common components to the original soldering iron (diode 1N4007, light-emitting diode, normally-closed switch and Zener diode). The conversion cost is low, adding up to about 0.5 yuan.

3, convenient and safe. The biggest advantage of the "energy-saving" soldering iron we have made is that the energy-saving switch does not need human control. It is "automatic". As long as the soldering iron is inserted on the soldering iron frame, the switch can be automatically disconnected. When the soldering iron is pulled out, Realize the automatic closing of the switch. A light-emitting diode is used as an indication to indicate whether the soldering iron is in a soldered state or a soldered state.

The simple energy-saving electric soldering iron not only solves the problem that the soldering iron tip is easily oxidized, but also achieves the purpose of longevity and energy saving.