Automatic dimming lamp circuit based on hysteresis comparator
A hysteresis comparator, automatic dimming technology, applied in the direction of light source, electric light source, electrical components, etc., can solve the problem of poor circuit anti-interference, achieve the effect of low cost, improve anti-interference, and facilitate promotion
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[0016] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0017] Combine below figure 1 The present invention will be described in detail.
[0018] An automatic dimming desk lamp circuit based on a hysteresis comparator, including a rectification unit, a hysteresis comparator, a dimming unit and an LED lamp, and the rectification unit, the hysteresis comparator, the dimming unit and the LED lamp are electrically connected in sequence; the hysteresis comparator Including operational amplifier U2A, voltage regulator tube D11, resistor R12, resistor R10 and resistor R13; the positive phase input terminal of operational amplifier U2A is connected to voltage regulator tube D11 via resistor R12 and grounded, and the positive phase input terminal of operational amplifier U2A is connected via resistor R13 The output terminal of the operational amplifier U2A...
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