Control circuit of automatic dimming welding mask
A welding mask and control circuit technology, applied in eye masks, ophthalmic surgery, static indicators, etc., can solve the problems of sensitivity, lack of brightness adjustment, long response time, uneven quality, etc., to achieve convenient adjustment settings and improve production efficiency , Prevent the effect of electro-optic ophthalmia
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Embodiment 1
[0074] Embodiment 1, the power supply voltage stabilization circuit adopts a low-power linear voltage stabilization chip U5 to reduce the power consumption during voltage regulation; as shown in the figure, T+ and T- are respectively connected to the positive and negative poles of the solar cell. When there is light, the whole machine will enter the working state, further reducing the useless loss of battery power; the switch W1B adopts a resistance switch two-in-one potentiometer, and the switch of W1B can manually cut off the output of the voltage regulator chip.
Embodiment 2
[0075] Embodiment 2, the battery under-voltage warning circuit uses a dedicated low-voltage detection chip, and the low-voltage detection chip U7 uses a chip XC61CC2502MR. When the voltage supplied to the chip is insufficient, the LED will light up to remind the user to replace the battery.
Embodiment 3
[0076] Embodiment 3, the photoelectric conversion circuit is composed of infrared photodiodes, which convert the infrared light signal in the welding light into an electrical signal, so that the subsequent circuit can drive the LCD black screen in time according to this, and protect the welder's naked eyes from strong light.
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