The simplest dimmer consists of only 5 parts and is capable of adjusting load power up to 2 kW at an AC voltage of 220 V. Even a novice radio amateur can cope with its repetition, the main thing is not to forget about safety precautions when testing and using this simple circuit.
Details
- Potentiometer 200 kOhm - http://alii.pub/5o27v2
- Resistor 10 kOhm - http://alii.pub/5h6ouv
- Dinistor DB3 - http://alii.pub/5o28g9
- Capacitor 100 nF - http://alii.pub/5n14g8
- Triac BTA 41 600B, or BTA 16 600 - http://alii.pub/5o284l
All parts are available and there is no shortage.
Circuit of the simplest dimmer
The dimmer circuit is shown in the figure and is connected in series to the load circuit. The operating principle is based on cutting half-waves with a triac. Upon arrival of the sinusoid, it seems to open with a slowdown and, depending on the installation, allows only parts of one or another half-wave to pass through.
This dimmer can also be used to regulate a lower voltage of about 12 V with proper selection of resistors.
Making a simple do-it-yourself dimmer
We cut out a small rectangle from a piece of foil PCB.
We clean the copper coating with a metal sponge to remove oxides and improve soldering. Using a hacksaw, needle file or file, cut the foil into squares. Please note that two of them are connected to each other.
We drill 6 holes for the triac and potentiometer.
We install the elements and solder them.
We solder the capacitor to the side.
Solder the resistor.
We cut off the resistor lead. Solder the dinistor.
The dimmer is almost ready. All that remains is to solder the wires to connect to the load gap.
The result was a very small, but very useful and powerful device.
Checking the dimmer in operation
We try to adjust the brightness of the halogen lamp.
Everything is fine and smooth. Up to 100 W of load power, the triac does not have to be installed on a radiator.
Now we are trying to regulate the power of the burner transformer.
The dimmer does its job perfectly. You can use this regulator, say, for your soldering iron, etc.
