Blog
  • PCBA repair process and purpose

    During the manufacturing process of PCBA, The short circuit PCBA boards caused by various reasons, so the worker need to do the repairing for PCBA boards. Repairing steps as below: Whole board inspection – Power on detection – Checking out problem points – Self-test after repairing – Second test – Second full board inspection...

    2018/03/31 zhengxiaowei 190

  • The relationship between surface technology and length of storage of PCB.

    The relationship between surface technology and length of storage of PCB....

    2018/03/23 zhengxiaowei 194

  • How to choose PCBA packaging?

    If a product that has undergone multiple processes has problems during the final shipping process, we will lose a lot. Therefore, we must pay special attention to packaging during transportation. We should prepare the packaging according to the customer's requirements and the characteristics of the product....

    2018/03/16 zhengxiaowei 148

  • What is one-step service?

    One-stop PCBA service means that all the information is sent to the factory which directly assembles the finished product which will be sent to the customer....

    2018/03/08 zhengxiaowei 118

  • How to Solve the Quality Problem in the Processing of SMT Patch

    Quality IssuesSolutions Gluing ProcessGluing wire/spillover Revise the gluing process parameters; Control the amount of gluing; Adjust the process parameters of SMT patch;Plugging of glue mouthEmpty g...

    2017/12/29 zhengxiaowei 124

  • Mod-8 Counter Using D-Type Flip-Flops

    We will need three flip-flops to give the necessary eight states from 000 (state 0) through to 111 (state 7). We begin by, as shown in Table 7.1, listing the eight possible present states of the circuit alongside the next states that must follow....

    2017/12/02 zhengxiaowei 27

  • Mod-N Synchronous Counters

    We have seen that the design of mod-2n binary up-counters is straightforward, with all T states produced, and cycled through in sequence....

    2017/12/02 zhengxiaowei 102

  • Implementation of the Steering Logic

    Since for this type of counter in general we need the input to the nth T-type used to construct the circuit to be TN=Q0 *Q2*…QN-1, = TN-1* QN-1 it is clear there are two ways in which the steering logic can be generated....

    2017/11/29 zhengxiaowei 116