soldering protoboard

Generally, there areB/C/D/k/IAnd other models, as shown in the following figure: Commonly used Hakko welding stations and nozzles, such as 900m-t-k, 900m-t-3c, and 900m-t-2.4d. How to choose a suitable soldering head I,Select proper soldering head size and shape: 1. selecting an appropriate soldering head can make the work faster. 2. selecting an appr

foreign body under the feeding device, and the spring is aging, or poor electrical), resulting in insufficient or poor retrieval of materials and throwing materials, there is damage to the feeding device. Countermeasure: Adjust the feeding device, clean the feeding platform, and replace the bad parts or feeding device. When there is a throwing phenomenon, you can first ask the on-site personnel to describe it, then, we can find out the problem based on the observation and analysis, so that we c

class thingsfound that only C + + or not, and then began to learn the database, but the beginning of contact with the database on self-taught me too painfulBecause the database and the hardware these were different for me at that time, then reluctantly learned the database, came to Guiyang's current companyTo the company after the discovery still have to learn web,shell,perl and other scripting language, well after learning finally can use the script to complete the work, after the script to le

The tutorial teaches you to use Photoshop to make 3D stereo hot soldering iron text effect, the main use of a sunset material to stack the effect of fire, like the students hurry to learn it! Final Effect Diagram: Material Picture Sunset: 1. First open the material picture, select all pictures (Ctrl + a) or use the Marquee tool (m) as needed to select a part of the picture, copy (Ctrl + C). Set the foreground and background

Wenku. baidu. comlink? UrlTuIzL-6JG7BNiitqRRoAw0jym3aw_OR38c7yCGgBabLGiH_Th11gH6zQCMi5KsK1_Fe4eiZ8L7Rmbq6kdToOZlSh8Aif77V2I8nbo67T3nO1, circuit board wiring, welding techniques and precautions ---- wenku. baidu. comviewa0d201766783e0912

PCB Optimization Design (i.)2011-04-25 11:55:36| Category: PCB design SMT technology is now very mature and widely used in electronic products, therefore, electronic product designers need to understand the SMT technology common Sense and manufacturability design (DFM) requirements. SMT process products, at the beginning of the design should be integrated into consideration of the production process, raw material selection, equipment requirements, device layout, test conditions and other element

planting.The use of small tin planting board is to fix the IC under the tin planting board, scrape the tin paste and then blow the board together, compress the ball and then remove the IC. It has the advantage of tin planting Board during hot air blowingBasically no deformation, if there is a lack of feet or the tin ball is too small after a tin planting phenomenon can be secondary treatment, especially suitable for new users. I usually use this tin board. The method we will introduce below is

Wave automatic soldering technology has been used in the electronics industry for many years, but the late failure of solder joints is still a headache, which greatly affects the quality and reputation of electronic products.This paper intends to make a preliminary study and discussion on the basis of practical experience.The so-called "late failure of solder joints", refers to the surface appears to be the quality of the solder, there is no "lap weld

3004202330-1-Wang Huiquan-1. How to weld the smd ic on the chip adapter board? Prepare tools for welding the integrated circuit of the table, such as a good soldering iron (the finer the head, the better) and solder paste. For fine pin spacing, first apply a layer of solder paste on the clean pad, and then use a clean constant temperature soldering iron to thin a layer of Solder Pad (according to observatio

the plug-in, mounting holes, slots, v-cut and other high stress concentration areas, reduce cracking or cracks.(11) To consider whether the socket, connectors and other components between interference, and structural design is contradictory.(12) The same type of cartridge components in the X or Y direction should be placed in one direction. Polarity-mounted components of the same type as far as possible in the X or Y direction consistent, easy to produce and inspection, the same board can be up

focus on what everyone cares about. I am the focus that everyone does not pay attention.Everyone is most interested in the bounce rate, and I like to pay attention to 0 or 100Bounce Rate 100 stay time 5 minutes 26 PVS, this page solves the difference between wave soldering and reflow soldering does not meet the user's level 2 requirements.The stop time indicates that the page is of high quality. Turnin

repair process is still quite complicated. Below, the author describes the repair steps in detail. 1. Peel off twisted-pair wires Like the "Earth-type" twisted-pair repair method, to repair twisted pair, the first thing to do is to peel off the twisted pair. In the stripping of twisted pair, must pay attention to, do not peel too long, because this kind of repair method, is directly with soldering iron. The length of the Twisted strand is 5cm. Twi

ports, analog and digital ground has a short contact. Note: Only a little bit short, the inside of the board is actually separate. Layout of the board:The usual order of component placement on a printed circuit board:Placing components with a fixed position in close coordination with the structure, such as power sockets, indicators, switches, connectors, etc., these devices are placed and locked by the lock function of the software, so that they will not be mistakenly moved later;Placing spe

unfavorable. Intranet links refer to links between pages inside the site, and links are exported links. The best way to achieve harmony Seo data analysis focus: I am not the focus of everyone's attention. I am the focus that everyone does not pay attention. Everyone is most interested in the bounce rate, and I like to pay attention to 0 or 100 Bounce rate 100 stay time 5 minutes 26 PVS, this page solves the difference between wave soldering and reflo

{Tagshow (Event)} "> Power outlet, indicator light ,{Tagshow (Event)} "> Switches, connectors, and so on. After these devices are placed, use the lock of the software {Tagshow (Event)} "> The function locks it so that it will not be moved by mistake in the future. Special {Tagshow (Event)} "> Components and large components, such as heating components, transformer and IC, are placed with small components. Distance of components from the edge of the Board: if possible, all components are placed

receive diode, amplification, bandpass filter, demodulation, shaping and other circuits to do together, when received this code, the microcontroller will encode the analysis and processing, so as to achieve the control of household appliances.The second method adopted by the ordinary MP3 audio 0, 1 encoding, and then amplified by the transistor and loaded into a 555-based circuit issued by the 38K carrier, by amplitude modulation to achieve remote control.Material: 940nm infrared emitting tube,

after the communication between the parties.5. The same type of cartridge components should be placed in the X or Y direction in one Direction. The same type of polar discrete components also strive to be consistent in the X or Y direction for easy production and inspection.6. Heating elements should be generally distributed evenly, in order to facilitate the cooling of the single board and the whole machine, in addition to temperature sensing components outside the temperature-sensitive device

One into the hardware deep like the sea!Used to be written SCM program and Linux driver, mainly C language, the hardware is also a little understanding, but most of them stay in the dip era of single-chip microcomputer!Now in a smart home project, hardware software to come, on the android. The driver has been made by the boss almost, a lot of drivers have been given to the original, changeConfiguration on the line, and not much difficulty. Now I have to bite the bullet and complete the hardware.

. Charge the battery for three hours before use C. Charge the battery two times in Windows 98 or Windows Me D. Replace the battery 6) Touchpad does not work A. Check for external mouse access and detect if it is normal with the mouse test program B. Check that the trackpad connection is connected correctly D. Replace the Touchpad E. Check the keyboard control chip for cold welding and false welding phenomenon F. Replace the motherboard 7) Serial device does not work A. Check whether th

do not have the PCB production capacity of the small factory, can be ordered to other manufacturers have produced a good PCB board. Figure 9 is a MTK produced by the PCB board.Figure 9. A MTK produced PCB board [] courtesy Http://farm3.static.flickr.com/2638/4165315089_04cccc5383_o.jpgWith the PCB board, you can start printing and Smt. With the development of technology, the old-fashioned through-hole PCB board has been almost extinct, modern PCB board most of the use of surface mount technolog