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  1. C

    A guide to LED Emergency Light Circuit with LDR

    What is LDR??   What is LDR (Light Dependent Resistor) as the name states is a special type of resistor that works on the photoconductivity principle means that resistance changes according to the intensity of light. Its resistance decreases with an increase in the intensity of light. It is...
  2. C

    PROJECT to replace a MMBT3904 in a Lenovo G710

    A Lenovo G710 has been delivered to me for repair. It was simple to fix the broken power plug. Yet, there is no power or charge. I discovered a transistor that had a short between the base and emitter, preventing something from turning on. really challenging to follow those minute traces and...
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