Electronic Circuits - Electronic Tutorials - Electronic Hobby Projects - A Complete Electronic Resource Centre
Electronic,  Microprocessor,  Mircro Controller and PC  based Projects / Circuits for Engineering Students, Hobbyiest and R&D persons

Transistor Fault Finding - Electronic Tutorials

Google
 
Web Hobbyprojects.com

Lower Base Bias Resistor Open Circuit Tutorial

Lower Base Bias Resistor Open Circuit

There is no potential divider action and the full +9 volts is applied to the base by R1.

This causes a high base current to flow, which in turn causes a high collector current to flow.

There is a large volts drop across R3, causing a low collector volts.

There is a large volts drop across R4, causing the emitter volts to rise.

<<<< Back to Transistor Fault Finding Tutorial