Dual Axis LED Chaser Circuit

Components Required:

• 10kΩ Resistor
• 3.3kΩ Resistor
• 220Ω Resistor
• 5mm LED
• 1µF Capacitor
• 220µF Capacitor
• NE555 IC
• CD4017 IC
• 9014 Transistor
• Self-lock Switch
• 100kΩ Potentiometer
• Power Connector
• PCB Board

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How To Order PCB

9014 Transistor?

The 9014 is an NPN bipolar junction transistor (BJT) commonly used in low-power switching and amplification circuits. It is popular among hobbyists and electronics designers because of its small size, reliability, and low cost.

Key Features:

• Type: NPN BJT
• Max Collector Current (Ic): ~500 mA
• Max Collector-Emitter Voltage (Vceo): ~45 V
• Gain (hFE): Typically 100–300 (good for amplification)
• Package: TO-92 (through-hole) or SOT-23 (surface-mount variant)

Pin Configuration (TO-92 Package):

1. Emitter (E) – Connected to ground or negative supply.
2. Base (B) – Controls the transistor (input signal).
3. Collector (C) – Output current flows through here.

(Flat side facing you, pins down: left = E, middle = B, right = C)

Applications of 9014:

• Signal Amplification – Used in audio pre-amplifiers and small signal boosters.
• Switching – Drives small loads like LEDs, relays, and buzzers.
• Oscillators & Timers – Often found in basic oscillator circuits.
• Consumer Electronics – Radios, toys, remote controllers, etc.

Why is the 9014 Useful?

• Works well in low-voltage and low-current circuits.
• Provides good current gain for simple amplification.
• Widely available and cheap.
• Perfect for DIY electronics projects.

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