Phase power regulator with microprocessor control

[Vermes]

It is a simple device that was designed to regulate the power of the soldering iron powered by 230V.
Scheme:



A typical synchronization with the net for PC814 was used. The device is controlled by triac with MOC3021 unsecured – what makes the system operates incorrectly at less than 15% (control is not linear, its threshold is in %). It needs to be checked with an oscilloscope. Setting value (from 0 to 100) is multiplied by 100us giving triac delay (from 0 to 10ms max).
The system has a transformerless power supply, so that the board is relatively small, single-sided, some SMD components, the rest threaded:



And the pictures:



The system actually has a very wide application – it may be used to adjust:

• soldering iron power 230V
• brightness of bulbs light
• heaters power (heat sink required)
• drills, jigsaws and similar devices speed

Moreover, after replacing 3 resistors, it can regulate the heating power of independently heated soldering iron at 24V, or even as a simple controller of a phase welding machine.
A video of the device operating:

Note! The system voltages are hazardous to human health and life!

Link to original thread (useful attachment) – Fazowy regulator mocy ze sterowaniem mikroprocesorowym