POWER ADJUSTABLE TRANSFORMERLESS
Strange as it may seem, we can get an AC voltage of low value due to the voltage divider formed by C1, R and Dz. 11 enough to straighten and filter as needed. To do this, we use the diode D and the electrolytic capacitor C2.
As soon as we get the DC voltage from the AC mains voltage, it suffices to attach a little limiting circuit that will function controller. For this regulated voltage, it is necessary that the basic T1 exceeds 0.6 V. This mission is devoted to all P1-R1-R2. The intensity provided by! Th Circuit will be around 100mA.
We used for this project, standard diodes: a 1N4001 diode and a Zener diode 20V. No need to remind that the orientation of these components is very important, since they are polarized. This basic pattern will help you locate the cathode (K) of the rectifier diode and the zener.
As you can see on the project scheme under consideration, the HV conversion area to BT and the filter and recovery section 1 occupy the left side of the diagram. The part Right corresponds to the voltage stabilization zone.
You will handle carefully the resistance of a certain power. First, the body resistance is devoid of color bands which is consistent due to the temperature that they can reach. It surélèvera on the circuit to prevent overheating.
At this stage, we have to place capacitors. electrolytic type capacitors must be oriented precisely. T.e sign " '+"' spot on their body indicates positive terminal.
The pinout of the transistors can be problematic. That is why this illustration face the pins of the transistors used. In addition, screen printed circuit clearly indicates the position of each pin.
As we have mentioned repeatedly. Implantation diodes obeys a predetermined position. The picture shows the final position of the latter.
To properly implement the pins of the transistors, namely the emitter, base and manifold. Do not confuse the two transistors, which are of two types: NPN and PNP.
The component layout is complete. For our installation is ready, you only connecting the power supply and attach the connector corresponding to the terminals exit. After connecting the installation to the 220-volt outlet, you will handle it with A LUXURY PRECAUTIONS!