7 Segment 1.5 inch Common Anode 15BS

Description

1.5″ Common Anode 7-Segment LED Display (15BS) – Key Specifications

1. Basic Parameters

• Display Type: Single digit, 7-segment + decimal point (8 total LEDs)
• Color: Red (standard brightness)
• Configuration: Common Anode (+V connected to common pin)
• Character Height: 1.5 inch (38.1mm)
• Digit Format: 0-9, A-F (hexadecimal capable)

2. Electrical Characteristics

• Forward Voltage (Vf): 1.8-2.2V per segment (typical @20mA)
• Forward Current (If): 20mA per segment (recommended)
• Max Continuous Current: 25mA per segment
• Power Dissipation: 0.5W max (all segments + DP on)
• Voltage Drop (Common Anode): ~1.5V

3. Pin Configuration (10-pin, Dual-in-line)

Pin 2: Segment D
Pin 3: Common Anode (COM)
Pin 4: Segment C
Pin 5: Decimal Point (DP)
Pin 6: Segment B
Pin 7: Segment A
Pin 8: Common Anode (COM)
Pin 9: Segment F
Pin 10: Segment G

Note: Pins 3 & 8 are internally connected

4. Optical Specifications

• Luminance: 500-800 mcd (typical)
• Viewing Angle: 60° (wide angle)
• Wavelength: 620-630nm (red)

5. Physical Dimensions

• PCB Size: ~40x20mm (varies by manufacturer)
• Segment Width: ~5mm
• Digit Thickness: ~8mm
• Pin Length: ~12mm (breadboard-friendly)

6. Thermal & Environmental

• Operating Temp: -30°C to +70°C
• Storage Temp: -40°C to +85°C
• Material: Plastic case, epoxy-filled

7. Recommended Circuit

• Current-Limiting Resistors: 150Ω per segment (for 5V supply)
• Driver IC: CD4511 (BCD-to-7-segment) or 74HC595 shift register

8. Applications

• Digital clocks
• Instrument panels
• DIY counters
• Industrial displays

9. Manufacturer Variant:

• Generic 15BS series

Why Choose Common Anode?

✅ Easier interface with NPN transistors
✅ Better for multiplexing multiple displays
✅ Compatible with most microcontroller GPIO

Design Notes

1. Always use current-limiting resistors (calculations below)
2. For 5V systems:
   • Resistor = (5V – Vf – Vce) / If ≈ (5-2-0.2)/0.02 = 140Ω → use 150Ω
3. Multiplexing tip: Keep duty cycle >1ms per digit to avoid flicker