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Bass Tone Treble Stereo SK199 Kit Board
- Bass Tone Treble kit Volume Control Module
- Better performance, the frequency band is wide and noise is very small
- Sound warm and distorted, high fidelity
- Working Voltage: DC 12V
- Tune type: Low/High Pitch/Balance/Volume
- Channel: Double channel (Stereo)
₨ 135 -
BC547 NPN Transistor
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Type: NPN Transistor (BC547)
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Maximum Collector Current (Ic): 100mA
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Maximum Collector-Emitter Voltage (Vce): 45V
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Power Dissipation: 500mW
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Low Noise Output: Ideal for audio amplification.
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TO-92 Package: Compact, easy-to-use design for breadboards and PCBs.
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Applications: Signal amplification, switching, audio processing, and general-purpose electronics.
₨ 5 -
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BC557 PNP Transistor
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Type: PNP Transistor (BC557)
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Maximum Collector Current (Ic): 100mA
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Maximum Collector-Emitter Voltage (Vce): 45V
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Power Dissipation: 500mW
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Low Noise Output: Suitable for audio amplification.
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TO-92 Package: Compact and easy to solder on PCBs.
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Applications: Amplification, switching, signal processing, and general-purpose electronics.
₨ 5 -
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BD139 NPN Transistor
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Type: NPN Transistor (BD139)
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Maximum Collector Current (Ic): 1.5A
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Maximum Collector-Emitter Voltage (Vce): 80V
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Power Dissipation: 12.5W (with proper heat sinking)
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High Gain: Ideal for power amplification applications.
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TO-126 Package: Ensures efficient heat dissipation.
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Applications: Audio amplification, power switching, motor control, and general-purpose electronics
₨ 11BD139 NPN Transistor
₨ 11 -
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BD140 PNP Transistor
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Type: PNP Transistor (BD140)
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Maximum Collector Current (Ic): 1.5A
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Maximum Collector-Emitter Voltage (Vce): 80V
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Power Dissipation: 12.5W (with proper heat sinking)
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High Gain: Ideal for power amplification and switching.
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TO-126 Package: Efficient heat dissipation for enhanced performance.
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Applications: Audio amplification, motor control, power switching, and general-purpose electronics.
₨ 11BD140 PNP Transistor
₨ 11 -
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Bluetooth Mp3 Player Kit USB, FM, AUX, BT Audio Circuit Module
- 1. Double decoding supports music in MP3/WMA/WAV format;
- 2. Support Bluetooth function;
- 3, with digital tube display;
- 4, support MMC / SD / MMA and other cards, support USB interface (U disk);
- 5, power failure memory function 24C02;
- 6, support 5-10 meters distance infrared remote control operation;
- 7, support for external audio input LINE IN (AUX);
- 8, support radio FM, receiving frequency band (87.5MHZ-108.0MHZ);
- 9, button: four buttons multi-directional control, MODE / previous song / play / pause / next song;
₨ 340 -
BMS 2S 20A 7.4V Li-Ion Battery Protection Board with Balance Function 🔋
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⚡ High-Level Protection: Protects against short-circuits, over-charge, over-discharge, and over-current.
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🔄 Balance Function: Maintains perfect charge balance between cells for longer battery life.
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🔋 High Current Capability: Supports max working current 20A, over-current protection up to 25A.
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🌡 Wide Temperature Range: Works in -10°C to 50°C environments.
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💡 Ultra-Low Power Draw: Static current <18µA, ensuring minimal energy loss.
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🛠 Compact & Easy to Install: Size 48.4 × 20.1 × 4mm, perfect for all DIY lithium battery projects.
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✅ Safe & Reliable: Low internal resistance (<7mΩ) for stable performance.
₨ 199 -
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BMS 2S 7.4V 8A Lithium Battery Protection Board – High Accuracy & Safe Charging
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🟢 High-accuracy voltage detection – Keeps your batteries safe & efficient
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🔴 3-stage over-current protection – Over-current 1, Over-current 2 & Short circuit
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🟡 MOSFET control – Smooth and safe charge/discharge
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🔵 Super low standby current – Less than 5µA for long-term storage
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🟣 Works in extreme temperatures – From -40°C to +50°C
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🟠 Compact & durable – 38×8×2 mm, resistance < 300mΩ, lifespan 50,000+ hours
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⚡ Repairable short circuit protection – Safe recovery after faults
₨ 140 -
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BMS 3S 40A 12.6V Li-ion Lithium Battery Protection & Charging Board – For 18650/26650/Polymer Batteries
- ⚡ High Discharge Capability: Supports up to 40A continuous discharge
- 🔋 Safe Charging: Supports up to 20A continuous charging
- ✅ Battery Protection: Prevents overcharge, over-discharge, and short circuits
- ⚖️ Balance Version: Maintains each cell at proper voltage
- 🔥 Thermal Protection: Automatically discharges if single cell exceeds 4.2V
- 🛠️ Wide Compatibility: Works with 18650, 26650, and polymer lithium batteries
- 🏋️ High-Power Drill Support: Can handle ≤ 170W drills with proper batteries
- 🧰 Enhanced Version: Compact size for tight installations
- ⚠️ Strict Wiring Protocol: Connect 0V, 4.2V, 8.4V, 12.6V exactly as diagrammed
- 💡 LED/Resistor Monitoring: 430 resistor heats to discharge overvoltage safely
- 🌍 DIY & Industrial Use: Ideal for custom battery packs, e-bikes, tools, and robotics
- 🛡️ Durable Design: High-quality PCB ensures long life under high current conditions
₨ 350 -
BMS 4S 40A Li-ion Lithium Battery Charger Protection Board 18650 BMS 14.8V 16.8V
- Product Name: 4 string 14.8V 16.8V 40A lithium battery protection board
- Charging voltage: DC 16.8V~17V
- Continuous discharge current: 40A maximum (if the heat dissipation environment is not good, please reduce the load current)
- Continuous charging current: up to 20A
- Balance VersionProduct size: 45*60*4mm
- Enhance VersionProduct size: 44*55*4mm
- Applicable choice: applicable to the nominal voltage of 3.7V, fully charged 4.2V lithium battery
- (including 18650, 26650, polymer lithium battery), can be drilled below 170W
₨ 350 -
BMS 5S 15A Lithium Battery 18650 Charger 18.5V
- Continuous discharg current: 15A(max)
- Instantaneous discharg current: 25A
- Charge:
- Charge voltage: 21V
- Charging current: 15A(max)
- Overcharge Protect:
- Over-charge detect: 4.28±0.05V
- Over-charge release: 4.28±0.05V
- Over-discharge Protect:
- Over-discharge detect: 2.55±0.08V
- Release voltage: 2.9±0.1V
- Short-circuit Protect:
- Protect condition: Cut load
- Release condition: Cut load
- Over-current Protect:
- Detect voltage: 150mV
- Current detect: 30±3A
- Release condition: Cut load
- Inner Resistance: ≤20mΩ
- Self-consumption:
- Working current: ≤30uA
- Working Temperature Range: -30-+80℃
₨ 370 -
Breadboard 400 Tie Points DIY Bread Board
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🔴 Zero-Solder Prototyping: Effortlessly build and test circuits without welding, making it 100% reusable and perfect for temporary designs.
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🟠 High-Density Tie Points: Features a total of 400 points, including a 300-point terminal strip and dual 100-point distribution strips.
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🟡 Universal Component Support: Fully compatible with resistors, transistors, diodes, LEDs, and capacitors.
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🟢 Precision Wire Fit: Optimized for 21-26 AWG (0.4-0.7MM) wire, offering higher physical strength and lower resistance than standard boards.
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🔵 Durable Spring Clips: Built with phosphor bronze nickel-plated spring clips to ensure long-lasting, secure electrical connections.
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🟣 Easy Component Placement: Includes colored coordinates printed directly on the board to help you place components accurately and quickly.
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🟤 High-Grade Material: Constructed from robust ABS plastic, ensuring the board remains a staple in your toolkit for years.
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⚪ Compact Desktop Footprint: At just 8.5cm x 5.5cm, it fi
₨ 195 -