Light touch switch low-voltage rectifier filter circuit: after the beginning of the high-frequency ripple voltage step-down transformer to be used after the same capacitance diode and rectified and filtered, and the capacitance rectifier can not have too much use of the AC impedance, otherwise it can not which filter out high-frequency AC component, so select the capacitor not only the capacity to be large, but also have a lower AC resistance for the job, also can be seen with a huge volume of 1,2 core inductor, and filter capacitor together filter out high frequency AC component, ensure that the output pure DC. Press the shrapnel of the printed circuit.
　　Light touch switch selection methods How important? A good light touch switch, for the life of the entire product, it is also very important. Like on a computer keyboard, remote control and so on. If you are poor touch switches, pressing through frequent cause metal shrapnel loses its elasticity and fatigue failure. Therefore, the touch switch selection is very important. Waterproof touch switch is good or bad factors, mainly the key is protective waterproof touch switch, can decide weldability, conduction reliability, longevity, feel, production processes and installation size and other factors.