The development trend of PCB manufacturing technology in the future is to high density, high precision, fine aperture, fine wire, small spacing, high reliability, multi-layer, high-speed transmission, light weight, thin shape.
Peel off the bad part of the copper wire to see the copper foil surface, you can see the normal color of the copper foil surface, there will be no bad side erosion, copper foil peeling strength is normal.
In the process of board making, there are several processes to go through the yellow light room. The visual effect of green in the yellow light room is better, but this is not the main.
The capacitor lead should not be too long, especially the high-frequency bypass capacitor should not have a lead.
Low frequency oscillators are used to reduce energy consumption, such as in battery-powered systems, and high frequency oscillators are used to respond to events or to perform heavy calculations by the CPU.
installed on the Printed Circuit Board (PCB) surface or other substrate surface, through reflow welding or immersion welding and other methods to be welded and assembled circuit installation technology.
As we all know, circuit protection is mainly to protect the components of electronic circuits from damage under the circumstances of overvoltage, overcurrent, surge, electromagnetic interference, and so on, and the selection of appropriate circuit protect
As the temperature increases, the holding current and trigger current will decrease, so it is important to know the temperature of the environment in which PPTC is applied.
In addition, in many cases, due to the reaction and dissolution, in the printed circuit industry, residual film and copper may also form accumulation in the corrosion fluid and blocked in the nozzle of the corrosion machine and acid pump, have to stop pro
In addition, this capacitor should be purchased with a relatively large volume, and those with a small volume should also be marked 50V4700uF as far as possible.
The rectifier tube QL for bridge rectifier uses a 15-20A silicon bridge, which is compact and has a fixing screw in the middle, which can be directly fixed on the aluminum plate of the housing for favorable heat dissipation.
it is difficult to accommodate the software used for debugging procedures, so to debug the microcontroller software, the use of microcontroller simulator.