Soldering station with own hands
During the repair of microcircuits, the motherboardyou need to use a soldering iron. But it is not always convenient to operate, because it quickly overheats, there is no possibility to regulate the temperature. And then a mobile advanced soldering station is needed. With her own hands learned to create folk craftsmen.
One option is to create a soldering station,which is placed in the power supply (more precisely, its body) from the soldering iron, eighty-five by fifty-five to sixty-five millimeters, with the possibility of connecting to it an old EPSN. To create a soldering station, you need to purchase a resistive soldering iron with a heater, a resistive sensor and an additional wedge-shaped stinger of 1.6 millimeters.
The EPSN incorporates a thermocouple from a multimetermade in China. The controller board got forty-three by thirty-three millimeters. Portable digital soldering station, assembled with their own hands, informs on readiness for work of soldering irons with inscriptions on the display. After startup, the controller turns on the ACT and reads the voltage level on the inputs PC0, PC1. In the event that it is equal to the supply voltage, then there are no soldering irons, and "Err" appears on the display indicating an error.
When the voltage at one of the inputs is less than 4.5Volt, then you can choose a soldering iron either resistive or thermocouple. And for everyone you can use the keys to adjust the temperature. A flashing dot appears on the display to indicate which instrument is selected. The power of the soldering iron can be adjusted by PWM modulation with the VT1 key.
When the soldering station is assembled by hand,you can do without additional transistors, because with a current of 2 mA will be obtained intense and bright glow. The cathodes are directly connected to the ports of the controller. The indicator should be soldered to the board with thin wires and fixed from the back side with a hot-melt adhesive.
To place the buttons and the display, you mustmake holes in the front of the shell. Draw a panel in the mirror image print on a transparent film, glue the double-sided white tape on the side of the toner, cut off around the perimeter of the pattern and then paste on the body. For the convenience of the button, it is better to glue it to the panel with a hot melt adhesive.
For installation work with large boards,as a motherboard PC or laptop, the infrared soldering station is suitable, it's also possible to make it by yourself. For soldering with surface mounting of the PCB and its components (eg BGA), either hot air or infrared radiation is suitable.
The device itself consists of a control unit,located in a separate housing. It has two heaters and board mounts. The top position can be changed depending on the fixed board. The bottom heater is a hob for electric stoves with a capacity of two kilowatts and a diameter of two hundred and twenty millimeters. The upper heater is four tubular halogen lamps. Each of them - 150 watts each. Thus, the soldering station, assembled with its own hands, acquires a complete look.
A tripod can be made from racks from a matrixprinter. The rest of the details are also borrowed from old computer technology. The indicator is a 2-line liquid crystal module and a controller. Instead of pulse transformers, it is better to use the seven-core and their radiators. It must be remembered that caution is needed when installing them, since the seven-strings are live. In addition to these necessary parts, a power supply unit is required for the soldering station, which provides current through two channels, a keyboard, a display, an audible alarm and a zero detector.
If you created a soldering station with your own hands,It is important to know and some safety rules when working with it. For example, you should not allow halogen lamps to be stained with fat. Therefore, they must be thoroughly wiped with acetone or gasoline, and wear protective goggles from the sun before starting work.