Friday, April 5, 2013
Christmas Star
We hope this circuit diagram will help you for your Christmas tree. This is not a difficult circuit but we do not recommend this for kids as it requires two voltages, 230 Volts and 9 Volts. There are two ICs and one Diac do the major role in this circuits.
When you switch on the L1 bulb gradually increases its brightness. After it comes to the maximum brightness the bulb starts decrease the brightness gradually. This will never stop until you switch off the circuit as the cycle repeats.
You can change the brightness of the bulb by adjusting the VR1, but be careful when the circuit is connected to the live current. Make sure you use the same value and the ratings of the capacitor for the C3. Do not use low voltage of capacitor for it. The brightness of the bulb depends on the C3 capacitor’s charge and discharge.
