Power Battery Saver Circuit
Basic Circuits
This is power battery saver circuit using IC-555 timer. The lamp is controlled with PWM model by adjusting of potentiometer P1. PNP power transistor to driver lamp. When use normal lamp,some times a lamp that is used have too bright. To adjust the brightness with the variable resistor, it would not be appropriate. Because power loss too much. For this circuit can save the power of battery. The brightness of the bulb is equal to the amount of power supplied to the battery. How this circuit Usually, we will enter the normal voltage to the lamp. However, high power loss. …
3000 watts Dimmer for  Inductor Load
Controls & Timers
This is the 3,000 watts Dimmer for inductor load example: the Electric Fan, AC motor,Electric drill etc. But most general dimmers is used for resistors load only such as lamp, soldering iron, heating coil,etc. Why our project can do? The normal dimmer cannot use for inductor load, because the phase of current and voltage drop across load not same, the current will slow than the voltage by 90 degrees. (Theoretical maximum). If we trig the triac’s gate lead at a angle of normal voltage, but current will lower than the holding current. How it works Figure 1 is Schematic Diagram …
Modify AC Dimmer to automatic light switch controller
Basic Circuits
Way to modify an AC dimmer into a light switch circuit, to turn ON-OFF and automatic light dimmer or two in one form. Since, the general dimmer uses a triac to control a load like a relay contact. So we can easily make it by a few parts. The automatic night light dimmer circuit See Figure 1. We put the parts includes S2, LDR and RA-30K, 1/2W or RB to the AC dimmer circuit. Turn-on a switch-S2, this circuit becomes the automatic light switch circuit. When no light (or night) to LDR, the circuit will be closed,the lamp as load …