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The connection method with light touch switch is characteristic.

Release time:2018-09-11    Clicks: Click

 
The connection method with light touch switch has its own characteristics, and the specific connection method is described in detail below.
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Light touch switch with lamp is a kind of weak-current electronic switch used below the safety voltage (36V). The principle of the product is that the switch can be switched on by pressing the switch button lightly when used, and the switch will be disconnected when the hand is loosened. The internal structure of the switch is realized by the force elastic movement of the metal shrapnel.
Light touch switch has been widely used in home appliances such as audio-visual products, digital products, remote controllers, communication products, household appliances, security products, toys, computer products, fitness equipment, medical devices because of its small contact resistance, clear touch and complete specifications. Materials, banknote pen, sound equipment, laser pen buttons and so on. But the light touch switch also has its shortcomings, frequent press will make the metal fragments fatigue loss of elasticity and failure. So now most of the electrical buttons are directly replaced by conductive rubber or pot switch metal shrapnel, such as computer keyboard, remote control, etc.
Low-voltage rectifier filter circuit with light-touch switch: After high-frequency transformer step-down, the pulsating voltage should also be rectified and filtered by diode and capacitor, and the capacitor used in the rectifier part can not have too much AC impedance, otherwise the high-frequency AC component can not be filtered out, so the selected capacitor is not only capacitive. Large amount, but also have a lower AC resistance, in addition to see 1 or 2 large volume with a magnetic core inductance coil, together with filter capacitors to filter out high-frequency AC components, to ensure the output of pure DC.
Low-voltage rectifier filter circuit with light-touch switch: After high-frequency transformer step-down, the pulsating voltage should also be rectified and filtered by diode and capacitor, and the capacitor used in the rectifier part can not have too much AC impedance, otherwise the high-frequency AC component can not be filtered out, so the selected capacitor is not only capacitive. Large amount, but also have a lower AC resistance, in addition to see 1 or 2 large volume with a magnetic core inductance coil, together with filter capacitors to filter out high-frequency AC components, to ensure the output of pure DC. Press the shrapnel to connect the printed circuit.
Touch switch power test with lamp
1. temperature drift and temperature coefficient of light switch with lamp:
2. Temperature drift: The variation of ambient temperature affects the variation of the parameters of the components, which results in the variation of the output voltage of the regulator.
3. Absolute Temperature Coefficient: A change in the value of the output voltage caused by a change in temperature of 1 degree Celsius, in units of V/C or millivolt per degree Celsius.
4. relative temperature coefficient: the temperature changes 1 degrees Celsius, causing the output voltage to change relative to UoT/Uo, the unit is V/ C.
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