LED Flasher Circuit

A Dimmer is an electronic device that uses PWM signals to control the speed and direction of a motor. It works by varying the width of the pulses to adjust the average voltage applied to the motor, thereby controlling its speed.

Components Used:

• 9014 Transistor
• 510 Ohm
• 33k Ohm
• Red LED * 5
• Green LED * 5
• 22uf Capacitor
• Connector
• 3.7v Battery

Gerber File:

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Circuit Diagram:

9014 Transistor:

The 9014 is a low-power, general-purpose NPN transistor used in many small signal and low-voltage applications. It is designed for amplifying or switching electronic signals. Due to its low cost and easy availability, it’s a favorite among hobbyists and engineers alike.

🔍 Technical Specifications

Parameter	Value
Type	NPN
Collector-Emitter Voltage (Vce)	45V
Collector-Base Voltage (Vcb)	50V
Emitter-Base Voltage (Veb)	5V
Collector Current (Ic)	800mA
Power Dissipation	625mW
DC Current Gain (hFE)	64–400
Transition Frequency (fT)	250 MHz
Package Type	TO-92

9014 Transistor

The 9014 transistor comes in a TO-92 package, which has three terminals:
E (Emitter) – Current flows out from here.

B (Base) – Controls the transistor.

C (Collector) – Current flows into this terminal.

Modes of operation:

Cut-off Region (OFF): No base current → No collector current.

Active Region (Amplifier): Small base current → Proportional collector current.

Saturation Region (ON/Switching): Base current high → Maximum collector current.

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