Mnemonic Techniques for Circuit Board Repair

Mnemonic Techniques for Circuit Board Repair

1.1 Basic Recognition Mnemonics A circuit board can change in countless ways; the combination of components is key. Resistors and capacitors are the most common; understanding their symbols is essential. Resistance changes and capacitor leakage; remember the basic characteristics. Inductance and voltage changes can be checked; measure the PN junction of transistors. MOSFETs can be … Read more

How to Fix an Unreadable SD Card Without Formatting

How to Fix an Unreadable SD Card Without Formatting

By Xiao Cheng As an engineering student, it’s essential to have some basic scientific knowledge! Today, I will share a simple method to fix an SD card, avoiding formatting it and losing your phone data. Steps Connect your phone to your computer via a data cable. Then, in “Computer” (or “My Computer” on XP systems), … Read more