Connection characteristics of switch circuit

The low voltage rectifier filter circuit with light touch switch: the pulse voltage after the high frequency starting transformer will also use diode and capacitor to rectify and filter, and the capacitor used in the rectifying part can not have too much AC impedance, otherwise the high frequency AC component can not be filtered, so the selected capacitance is not only The capacity is large, and a lower AC resistance is required. In addition, 1 and 2 large magnetic inductors with magnetic cores can be seen and filter capacitors are used to filter the high frequency AC components and ensure the output of pure DC. Press the shrapnel to connect the printed circuit.
How important is the selection method of light touch switch? A good light touch switch is also important for the whole product life. Such as computer keyboard, remote control and so on. If it is a poor touch switch, after frequent press, the metal shrapnel will lose its elasticity and become invalid. Therefore, the selection of light touch switches is very important. The key factors are the protection of the waterproof switch, the weldability, the reliability, the life, the feeling, the production process and the size of the installation.
Switch power test

1. light touch switch: temperature drift and temperature coefficient:
2. temperature drift: the change of the temperature of the environment affects the change of the parameters of the components, thus causing the voltage variation of the voltage regulator to indicate the temperature drift.
3. absolute temperature coefficient: the temperature change of 1 degrees Celsius causes the change of the output voltage value UoT, the unit is V/ degree or milli V per centigrade.
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.