Adaptive lamplight brightness regulator
A regulator and self-adaptive technology, applied in the direction of light source, electric light source, electric lamp circuit layout, etc., can solve the problem of energy waste, and achieve the effect of energy saving, simple circuit structure and easy realization
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Embodiment 1
[0016] Such as figure 1 The shown adaptive light brightness regulator includes a lamp L and a bridge rectifier circuit connected to the lamp L, and the output terminals of the bridge rectifier circuit are respectively connected to the A terminal and the K terminal of the thyristor VS , the A terminal of the thyristor VS is connected to the drain of the transistor T through the first resistor R1, and the drain and the gate of the transistor T are connected in series with the second resistor R2 and the photoresistor R3 , the K end of the thyristor VS is connected to the source of the transistor T through the fourth resistor R4, the G end of the thyristor VS is connected to the source of the transistor T, and the gate of the transistor T The pole is connected to the common terminal of the fourth resistor R4 and the thyristor VS through the capacitor C.
[0017] Such as figure 1 As shown, the bridge rectifier circuit is composed of diodes D1-D4, and the lamp is connected to the ...
Embodiment 2
[0019] Such as figure 1 In the shown adaptive light brightness adjuster, this embodiment is optimized on the basis of the above embodiments, that is, the resistance of the fourth resistor R4 is less than 1,000 ohms. The function of the fourth resistor is mainly to send the trigger pulse to the G terminal of the transistor to trigger the conduction of the thyristor. Its resistance value is not easy to be too large.
[0020] Choose photoresistor R3 as GL5616. The photoresistor is a very important factor of the automatic light regulator, and its performance is directly related to the sensitivity of the automatic light regulator to light. GL5616, with its high sensitivity and high spectral response, can effectively improve the sensitivity of the entire automatic light regulator.
[0021] The capacitance of the capacitor C is 0.02 μF.
[0022] The silicon controlled rectifier VS adopts 3CT1A. The thyristor VS is also a very important factor of the automatic light regulator, its...
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