Homemade electric iron circuit design based on ATTINY24A + TM1637

[Marcelmg] The impression of Weller's RT hot iron head is very profound. Like many of his hardware masters, but it is looking at the high price of this soldering iron, so he decided to study our own welding. Taiwan, thus obtain the same iron iron function in a relatively low price. The user interface of the station deliberately maintains simple, only one four-digit LED display can display the temperature, and the rotary encoder can set it. When the knob is rotated, the display is switched between the current temperature and the setting temperature every few seconds. If you press it, the set temperature will be saved as the next default value. [Marcelmg] also includes a function that reduces the wear and energy consumption of the soldering iron head when the iron is fixed on the bracket. He initially plans to use the Hall effect sensor to detect when the iron package is wrapped, without having to physically connect it, but in the end he realizes the easiest way to connect one of the input pins on the microcontroller to a metal bracket. . Since the nylink is ground, he can easily detect if the pen tip is in place through several lines of code. It can be said that the station is powered by Attiny24a and writes firmware with C. use atmel studio IDE. [Marcelmg] The 24A has limited storage space, which is a challenge to solve it, and it is recommended that anyone who wants to follow his footsteps use some more flashing things inside. The LED display is a very common TM1637 type, and the rotary encoder is saved from the radio, the power supply is called from the old laptop. All in all, this looks very economical. Depending on your needs, DIY soldering operators can have functions comparable to the commercial model, or it can be very simple. In either case, the emergence of low-voltage soldering iron and power-up iron is more easier access to self-built soldiers. Try not using these modern skills will tend to be less charming. Be Be Article from HackADAY

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