What happens when transistors fail?
When a diode or a transistor fails, one of two things usually happens: A junction (or junctions) go short circuit (its resistance becomes very low or zero). Of course this list could be extended to include that junctions may become leaky (slightly low resistance), though this is rare.
Can transistors control current?
The transistor allows you to control a circuit that’s carrying higher current and voltage from the a lower voltage and current. It acts as an electronic switch. When there’s no voltage difference between the base and the emitter, the transistor turns off, or stops the flow of electricity from collector to emitter.
Why does a failed transistor occur in a high voltage circuit?
Such a rule suggests that a failed transistor is more likely to be in the output stages of a circuit than the low voltage, low power stages that precede it. Any circuit which uses either high voltages, high current or both, puts much more stress on semiconductors than low voltage, low current circuits.
Why is my transistor not working on my computer?
Sometimes this will result in a transistor (or a circuit board) not working when fitted within a system. This can be because the very thin insulating layers within the device have broken down completely due to high voltage static electricity, carelessly applied to the terminals.
Can a transistor be used to bypass a led?
If you really need to apply base current to switch the LED off, you could use the transistor to bypass the LED: However, this wastes all of the current that normally goes through the LED. A more power-efficient circuit would use another transistor that gets its base current shunted away by the first transistor:
What happens to silicon transistors as they age?
A slice of silicon 10 years old should be the same as a 1-year-old slice. However older systems containing transistors do begin to give more problems. The reason for this is that other components such as resistors may change their values with age, especially if they are subject to heating effects caused by current flow.