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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Out of stock18650 Li-Ion Cell 3000 mAh (Protected)
3.7V 3000 mAh 18650 cell, button-top with protection circuit. Genuine Samsung INR18650-30Q.
Wuzhi Audio ZK-MT21 Bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel Power Audio Stereo Amplifier Tone Board Bass AMP AUX
[Amplifier Board] Tip: Only when the audio input is sufficient and the power supply voltage/current is sufficient, there will be sufficient output power. The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power. Please make sure that the power of the adapter power supply is greater than the actual working power of the amplifier! You can check our others amplifier boards here. FAQ: 1. How to choose a power supply? The power supply with the board is very important. The ripple of the selected power supply must be small. A power supply with a large ripple will cause the bottom noise of the power amplifier board to become larger and there will be current noise. The higher the voltage, the greater the current, and the more adequate the output power. The power supply is 12V1A and can be equipped with 3-4inch speakers. If it is above 19V 5A, there is no problem with 8-10 inches, and the power supply must be highly regarded. If the voltage is too low, the amplified sound will easily cause sound distortion. If the current is too low, the speaker will pull down the voltage, which will result in abnormal operation or poor sound quality. It is recommended to use a power supply of 18V19V24V with a current above 5A. If you only have 9V12V or 1A 2A power supply, it can be used but the power is low. When the volume is selected close to the maximum, it may be distorted and affect the sound quality. 2. How to choose a speaker? Regarding speaker types: commonly used speakers are generally 4-8 ohms, which can be used. The left and right channel speakers need to be connected to full-range speakers or mid- to high-frequency speakers, and the power is between 20W-100W. The subwoofer speaker cannot be connected to an ordinary speaker, and a speaker with a subwoofer speaker must be connected with a power between 20-100. The dive frequency of the subwoofer speaker must be at least 50 Hz. If your speaker has a low power, such as between 20W-50W, it can be used. You need a lower power supply voltage to prevent the speaker from burning after amplifying the sound. For example, choose a power supply below 15V. If you are a 50W-100W speaker, don't worry about the problem of speaker burnout. You can choose a 12-24V power supply. The higher the selected voltage, the greater the sound or power that can be output. The speaker power should not exceed 100W, otherwise it will affect the sound quality. 3. Introduction to audio input mode This audio power amplifier module has two audio input methods: one is Bluetooth input, the other is AUX input, Bluetooth mode is preferred. Bluetooth can be connected in any mode. As long as the Bluetooth connection is successful, it is in Bluetooth mode, and the Bluetooth mode supports automatic connection back. When Bluetooth is not connected, AUX plug-in is in AUX mode. It should be note that when using AUX mode, you need to confirm that the Bluetooth connection of this module has been disconnected. 4. How to adjust the main volume? The MAIN—VOLUME knob adjusts the main volume. Right-handed main volume increases, left-handed main volume decreases. The main volume affects the volume of the left and right channels and the subwoofer. 5. How to adjust the left and right channel high and low sounds? The R&L CHANNEL—BASS knob controls the bass, right-turning bass enhancement, left-turning bass attenuation. When the knob is in the rightmost position, the bass is neither enhanced nor attenuated. The R&L CHANNEL—TREBLE knob controls the treble, the right-handed treble is enhanced, and the left-handed treble is attenuated. When the knob is in the middle position, the high pitch is neither enhanced nor attenuated. Note when adjusting the treble and bass: when the treble or bass is adjusted to the maximum by turning right, if the sound is distorted, the gain of the treble or bass adjustment is too large. You need to turn the treble or bass knob to the left to lower the gain or turn the right Turn the MAIN-VOLUME knob to the left to reduce the total volume. 6. How to adjust the subwoofer? SUBWOOFER—VOLUME knob is used to control the volume of the subwoofer. Right-handed volume increases, and left-handed volume decreases. The SUBWOOFER—FREQ knob controls the cutoff frequency of the subwoofer. The right-hand frequency increases, and the left-hand frequency decreases. The frequency adjustment range is 20HZ-200HZ. 7. The voice is small and okay. When the voice becomes louder, the voice becomes muddy? The sound is distorted, please turn down the total volume or change to a higher voltage adapter power supply. 8. The sound is small, but when the sound becomes louder, the sound freezes? If the input power is insufficient, the power supply itself is protected against intermittent power failure. Please replace it with a higher-power power supply; or if the power is too large, the power amplifier board will generate serious heat and thermal protection has occurred. Reduce power usage or enhance heat dissipation. 9. What factors are related to the sound quality? The sound quality is not only related to the power amplifier module, but also related to the power supply, sound source, and the entire audio system. Basically, every aspect of the audio system will affect the sound quality, among which the main links are the audio transmission line, the audio power supply, the tone circuit, the power amplifier circuit, the speakers and the surrounding environment. The sound quality is the best only when the sound source, power supply, amplifier module and speakers are matched. Feature: Product Name: 2.1 channel audio amplifier module Product Model: ZK-MT21 Bluetooth Version: 5.0 (no shielding, 15 meters) Input Sensitivity: 500mV Audio Input: AUX + Bluetooth Channel: 2.1 Chip Solution: Domestic power amplifier chip Power Range: DC 12-20 V / 5A above (Do not connect to 24V battery pack) Adapter Speaker: 20-100 W, 4-8 Ω Output Power: Left and right channels <50W, Subwoofer <100W Protection Mechanism: Anti reverse connection. Overheat. Overcurrent. Short circuit Product Dimensions: 93mm*90mm*22mm Package Weight : about 185g (packaging) Package Includes: 1 x ZK-MT21 bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel Power Audio Stereo Amplifier Tone Board Bass AMP AUX
Out of stockN20 12V 100rpm Micro Metal Gear DC Motor(High Torque) With JST Wire & Dust Cover
[Gear Motor] Overview of this N20 6-12V 100RPM metal gear motor Introducing the N20 6-12V 100rpm Micro Metal Gear DC Motor with High Torque, featuring exceptional durability and performance. This N20 metal gear motor boasts high torque. It also make it an ideal choice for various device who need robust and high rotational power. It is also built with a dust cover and a JST wire. This N20 6-12V dc gear motor also ensure protection against external elements for long life. Engineered for efficiency, the N20 6-12V 100RPM metal gear motor is designed to deliver a consistent and powerful rotational force. Its high torque capabilities make it perfect for applications demanding reliability, such as robotics, DIY projects, or small machinery. The inclusion of a dust cover enhances the motor’s resilience, ensuring it remains operational in challenging conditions. It also come with waterproof and dustproof features. This N20 100RPM dc gear motor stands out as a durable and versatile solution for your high torque needs. Trust the N20 6-12V dc gear motor with dust cover to provide a dependable and durable solution for your projects. And combine high torque performance with protective features for long life. Features High Torque Performance: The N20 6-12V 100RPM metal gear motor stands out with its high torque capabilities. And also ensure it can easily handle device who need robust and powerful rotational force. Dust Cover Protection: It also Feature a built in dust cover. This N20 dc gear motor is well protected against external particles. The dust cover also ensure the motor work in various environment. Waterproof Design: With a waterproof design, the N20 100RPM dc gear motor is ready to perform in harsh conditions. Its waterproof features add an extra layer of durability, making it a versatile solution for applications where exposure to liquids is a concern. JST Wire Connectivity: The N20 6-12V 100RPM metal gear motor comes equipped with a JST wire. And also provide a easy and secure connection for easy use in electronic project. This feature streamlines the setup process, making it user-friendly for both hobbyists and professionals. Versatile Applications: Designed for versatility, this N20 dc gear motor is suitable for a range of applications, including robotics, DIY projects, and small machine. Its adaptability and durability make it a go-to choice for various projects where high rotational power is important. Specification Specification Description Stall Current (A) 0.75 Rated Torque (kg-cm) 0.97 Stall Torque (Kg-Cm) 3.0 Motor Body Size (Diameter) 12mm Operating Voltage (VDC) 6 – 12 Rated Operating Voltage (VDC) 12 No Load Speed (RPM) 100 Rated Speed (RPM) 100 Shaft Type D-type, Single Side Shaft Diameter (mm) 3 Weight (gm) 12 Output Axial Length (mm) 10 Fuselage w/o Shaft Length (mm) 26 Screw Size M3 Protection Dust cover Main use of this N20 6-12V 100RMP waterproof dustproof dc gear motor Robotics Projects: The N20 6-12V 100RPM metal gear motor is also use for precise rotational movements in robotics device, offering high torque and reliability. DIY Electronics: DIY enthusiasts can also use high torque performance of this dc gear motor in various electronic projects. Small Machinery: The N20 motor with its high torque is perfect for applications in small machine. And provide efficient and dependable rotational power. Automation Systems: This motor easily fit into automation systems, contributing to enhanced machine performance with its robust and controlled rotational power. Educational Purposes: In education labs and projects, the N20 100RPM dc gear motor serves as a valuable tool. And also allow students to gain hands on experience and insights into motor mechanics and applications.
Out of stockHongli 18650 3.7V 3000mAh Lithium-Ion Rechargeable Cell
[Lithium Battery Cell] HONGLI Lithium-ion 18650 3.7V 3000mAh Battery Cell This Li-Ion 18650 3.7V 3000MAH Battery gives value for your money. It is a single cell, compact, and powerful battery cell with 3000 mAh capacity(Not actual capacity). It is very convenient to install in your project to fulfill a 3.7 Volt requirement with high capacity. The battery terminals can use in any compatible battery adapter/holder or it can be permanently soldered to your application’s power source wires. This is copy cells capacity may be different. Important: Never completely discharge the Li-ion battery ( below 2.5V under load ). Charge fully to 4.2V before first use. Never attach any metal moving part |magnet| to the top-positive or the bottom-negative battery contact. Never use force to install (insert) Li-ion battery. Do not use old and new battery cells together. Use only a high-quality battery charger. Do not expose to heat. Do not short (connect) positive (top), and negative (bottom) battery terminals (contacts). Keep battery that is not in use in the plastic holder (or any insulating [plastic] container). Do not charge a battery over 4.22V (another reason to use a high-quality battery charger). Don’t charge unattended. Do not store your li-ion batteries fully charged (for an extended period of time). Store in cold and dry place at approximately 3.7V (storage charge). After the battery is discharged-don’t leave it discharged=>charge it as soon as possible Features/Specs: Manufacturer: HONGLI SUPPLY SOURCE TECHNOLOGY Battery Type: Lithium-Ion Battery Battery Model: 18650 Battery Voltage: 3.7V Full Charging voltage: 4.20V Battery Capacity: 3000 mAh Rechargeable: Yes PCB Protected Board: No Shape: Cylindrical Battery Dimensions in: mm Dia: 18mm Length: 65mm Weight: 39gm Application: Portable equipment: POS, Portable printer, handset. Medical instrument: B ultrasound, Ecg monitoring instrument Military equipment: IR telescope Consumer electronics:PDA,MID,laptop,emergency light power source power tool e-bicycle Industrial and commercial instrument: light power meter, Gas testing instruments, fusion splicer, flaw detector Electric toy:RC car/ boat/helicopter Package Includes: 1 x HONGLI Lithium-ion 18650 3.7V 3000mAh Battery Cell Note: Product Images are shown for illustrative purposes only and may differ from the actual product.
Out of stock3S 60A Lithium Battery Charger BMS 18650 Protection Module Circuit
[Lithium Battery Protection Board] Lithium-Ion Battery Packs need to be Balanced Charged and protected from Over Charge and Over-Discharge. This ensures the safety of the circuit and gives optimum battery life preserving the original capacity through use. You can use this Battery Management System(BMS) to ensure these conditions. It also offers short circuit protection. If you are using a 3S Lithium Battery in your project, you can also use this BMS Module to protect it from short circuits in the circuit. In the event of a short circuit, the BMS will cut power to the battery and restart. The 3 Series 60A 18650 Lithium Battery Protection Board 11.1V 12.6V with Balance for Drill Motor Lipo Cell Module comes with recovery function-AUTO Recovery and Integrated 10 low load resistance MOS tube. It provides a continuous discharge of 60A, 100mA balanced current, for electric drill/sprayer/LED lights/low power inverter. (if the cooling environment is not good, please reduce the load current use). The Scope of Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, a polymer lithium battery) where Charging voltage can be range between 16.8V to 18.1V The board operates smoothly with Continuous charge current of (upper limit): 20A. The balanced version is suitable for starting current below 80A, power 135W below the drill (with balance). The Board comes in a size of approx. 46 x 60 x 3.4 mm which can be easily installed in a compact size or on the battery bundle itself. Features: 3S 11.1V 12.6V 60A 18650 lithium battery protection board (comes with recovery function-AUTO Recovery). Application: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650.26650, a polymer lithium battery). Continuous discharge current (upper limit): 60A (if the cooling environment is not good, please reduce the load current use). Continuous charge current (upper limit): 20A. Suitable for the drills with starting current below 80A, power 135W below. Note: The Successful start of the drill requires three 15C-20C power battery, or six 10C-15C power batteries (ordinary 18650 cannot start the drill!!). Strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit. When the load of the brush motor is used, try to connect a non-polar capacitor (withstand voltage above25V, capacity 10uF-100uF) to the motor’s positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube. 3 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use it in series. In the Discharge test, the voltage drops faster battery that group is a poor battery. Package Includes: 1 x Battery Balance Module Enhanced 18650( 3S, 60A )
USB Type-C Female Panel Mount Connector with Wire Cable
[Power Connector] USB Type-C Female Panel Mount Connector with Wire Cable USB Type-C Female Socket • Panel Mount Design • Cable Type • DIY & Electronics Applications The USB Type-C Female Panel Mount Connector with Wire Cable is a compact and durable connector designed for DIY electronics, portable devices, charging ports, embedded systems, automotive projects, and custom electronic enclosures. Featuring a USB Type-C female socket with a pre-attached wire cable, this connector allows quick integration into power and charging applications without requiring complex PCB assembly. Its threaded panel mount design enables secure installation on plastic, metal, or wooden enclosures, while the flexible cable provides convenient wiring for power input and charging circuits. This connector is ideal for USB-powered devices, battery projects, LED systems, development boards, and electronic prototypes where a reliable USB Type-C power connection is required. The compact construction makes it suitable for custom enclosures, charging ports, DIY power supplies, and embedded electronic projects. ⭐ Key Features USB Type-C female socket Non-waterproof panel mount design Threaded mounting body for secure installation Pre-attached wire cable for easy wiring Compact and lightweight construction Durable plastic housing Reliable power connection Easy installation on panels and enclosures Suitable for charging and power applications Ideal for DIY electronics and embedded projects 📋 Technical Specifications Product Type: USB Type-C Female Panel Mount Connector Connector Type: USB Type-C Female Mounting Type: Panel Mount (Threaded) Cable Type: Pre-attached Wire Lead Housing Material: Plastic Color: White Waterproof: No Application: Power Input & Charging Connection 🔧 Applications DIY Electronics Projects USB Charging Ports Power Bank Enclosures Arduino and ESP32 Projects Embedded Systems Portable Devices LED Lighting Systems Automotive Electronics Battery Charging Modules Custom Electronic Enclosures Robotics Projects Electronic Prototyping 📦 Package Includes 1 × USB Type-C Female Panel Mount Connector with Wire Cable ⚠️ Note Verify wire polarity before connecting power. Designed primarily for USB power and charging applications. This connector is not waterproof and should be used in dry environments or protected enclosures. Product appearance may vary slightly depending on the manufacturing batch.
Out of stock74HC00 Quad 2-Input NAND Gate IC through hole DIP-14 Package
[Logic Gates IC] The 74HC00 is a 14 Pin Quad 2-Input NAND Gate IC. This device contains four independent gates each of which performs the logic NAND function. NAND gates utilize advanced silicon-gate CMOS technology to achieve operating speeds similar to LS-TTL gates with the low power consumption of standard CMOS integrated circuits. All gates have buffered outputs. All devices have high noise immunity and the ability to drive 10 LS-TTL loads. The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground. Features: Pin: 14 pin Four Independent NAND Gate 14 Pin IC Operating Temperature to 70°C High-Speed Low Power CMOS Type Packages Includes: 1 x 74HC00 Quad 2-Input NAND Gate IC through hole
Out of stock74HC02 Quad 2-Input NOR Gate IC (7402 IC) DIP-14 Package
[Logic Gates IC] The 74HC02 is a 14 Pin Quad 2-Input NOR Gate IC. NOR gates utilize advanced silicon-gate CMOS technology to achieve operating speeds similar to LS-TTL gates with the low power consumption of standard CMOS integrated circuits. All gates have buffered outputs, providing high noise immunity and the ability to drive 10 LS-TTL loads. The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground. Features:- Four Independent NOR Gates 14 Pin IC Also Available in SMD Type Operating Temperature to 70 Deg C High-Speed CMOS Type
74HC08 Quad 2-Input AND Gate IC (7408 IC) DIP-14 Package
[Logic Gates IC] 74HC08 is Quad 2-Input AND Gate 14 Pin IC. The 74HC08 provides provides 4 independent 2-input AND gates with standard push-pull outputs. The device is designed for operation with a power supply range of 2.0V to 6.0V. It utilize advanced silicon-gate CMOS technology to achieve operating speeds similar to LS-TTL gates with the low power consumption of standard CMOS integrated circuits. The HC08 has buffered outputs, providing high noise immunity and the ability to drive 10 LS-TTL loads. The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground. Features:- 4 AND gates in a 14-Pin DIP Package Outputs Directly Interface to CMOS, NMOS and TTL Large Operating Voltage Range Wide Operating Conditions Specifications:- Type: DIP Bipolar Voltage Rating: 2.0 to 6.0V Temperature Rating: 0 to 70Deg C Number of: 14 Pins Mounting: Through Hole
Out of stock74HC20 Dual 4-input NAND Gate IC (7420 IC) DIP-14 Package
[Logic Gates IC] The 74HC20 is a 14 Pin Quad 4-Input NAND Gate IC. This device contains four independent gates each of which performs the logic NAND function. NAND gates utilize advanced silicon-gate CMOS technology to achieve operating speeds similar to LS-TTL gates with the low power consumption of standard CMOS integrated circuits. All gates have buffered outputs. All devices have high noise immunity and the ability to drive 10 LS-TTL loads. The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground. Specifications :- Parameter Specification Supply Voltage (VCC − 0.5 to + 7.0V DC Input Voltage (VIN) −0.5V to VDD + 0.5V Output Voltage (VOUT) − 0.5 to VCC + 0.5V Clamp Diode Current (IIK, IOK) ± 20 mA DC Output Current, per pin (IOUT) ± 25 mA DC VCC or GND Current, per pin (ICC) ± 50 mA Storage Temperature Range (TSTG) − 65°C to + 150°C Power Dissipation (PD) (Note 4) 500 mW S.O. Package only 500 mW
Out of stockIC 74HC86 Quad 2-Input Exclusive or Gate Dip
[Logic Gates IC] The MM74HC86 EXCLUSIVE OR gate utilizes advanced silicon-gate CMOS technology to achieve operating speeds similar to equivalent LS-TTL gates while maintaining the low power consumption and high noise immunity characteristic of standard CMOS integrated circuits. These gates are fully buffered and have a fanout of 10 LS-TTL loads. The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground. Features: Typical propagation delay: 9 ns Wide operating voltage range: 2–6V Low input current: 1 µA maximum Low quiescent current: 20 µA maximum (74 Series) Output drive capability: 10 LS-TTL loads Outputs Directly Interface to CMOS, NMOS, and TTL High Noise Immunity Characteristic of CMOS Devices In Compliance with JEDEC Standard No. 7A Requirements ESD Performance: HBM 2000 V; Machine Model 200 V Chip Complexity: 56 FETs or 14 Equivalent Gates These are Pb−Free Devices Package Includes: 1 x IC 74HC86 Quad 2-Input Product Images are shown for illustrative purposes only and may differ from actual product.
TPA3110 30W (15W+15W) Digital Stereo Audio Power Amplifier Board Module CA-3110
[Amplifier Board] The TPA3110/HDX8816A is a 2×15 Watt Class D Power Amplifier Board. It is designed to drive Professional Stereo Audio Speakers. This Amplifier Board is mostly used with 8-ohm speakers but it can successfully drive the speaker as low as 4 ohm. It's a very high efficient board which eliminates the need of using a heat sink. This device is fully protected against the shorts to GND, VCC & Output to Output. The Application of this device is endless in the segment of consumer electronics. Its most common and widely used application is in Televisions and mid-range compact audio equipment. Features : Wide range in Input voltage Source i.e. from 8v to 24v. It can be used for applications like cars, vehicles, computer speakers, family audio and video systems, and in your own DIY Music System. This amplifier board comes with 4 mounting holes, which is very helpful in tightening the complete circuit board according to your project requirement. 3110 power amplifier chip does not require a heat dissipation sink. It has over-current and over-heat protection. Specification : Operating voltage range: 8V to 24V Amplifier chip: TPA3110 / HDX8816A Output power: 2 x 15W Dimension: 25mm x 33mm x 3mm Package includes: 1x TPA3110 30W (15W+15W) Digital Stereo Audio Power Amplifier Board Module