Blown Fuse Indicator Circuit using one transistor

Blown Fuse Indicator Circuit using one transistor

This blown fuse indicator circuit warns us, lighting a LED, when there is a problem in an electrical installation protected by the fuse.

It is very important to correct the faults in the electrical system of an automobile or motorcycle or other, as soon as possible. This circuit will warn us when this happens.

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Light Operated Relay Circuit using LDR / Photoresistor

Light Operated Relay Circuit using LDR / Photoresistor

Light Operated Relay Circuit using LDR.

The LDR varies its value (ohms) depending on the amount of light that illuminates it. The more light less resistance and less light more resistance, A potentiometer is used to control the light level that activate the relay

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How to Measure Beta of a Transistor? (β / hfe of transistor)

How to Measure Beta of a Transistor? (β / hfe of transistor)

How to Measure Beta of a Transistor? (β / hfe of transistor)

The beta (β) is a characteristic of each transistor. This feature is found in the NTE, ECG manuals, etc. These manuals have a minimum or approximate values of the real values. This means that we do not know the real value of the transistor.

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