5pcs free drive

Description: USB external sound card Bare board, visible small and easy to carry The chip type: CM108 external oscillator Output input: 3.5mm green headphone jack, 3.5mm microphone socket USB interface, plug and play, instead of the traditional sound card (when computer sound card is broken, can be replaced directly) Output analog audio signals can be directly driven by the headset or output to the active speaker WIN2000, WINXP, WIN3003 system does not need to install drive program Package included: 5 x USB sound card

Description:   USB external sound card Bare board, visible small and easy to carry The chip type: CM108 external oscillator Output input: 3.5mm green headphone jack, 3.5mm microphone socket USB interface, plug and play, instead of the traditional sound card (when computer sound card is broken, can be replaced directly) Output analog audio signals can be directly driven by the headset or output to the active speaker WIN2000, WINXP, WIN3003 system does not need to install drive program   Package included:   1 x USB sound card

5Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Features: 1. As a square wave signal generator,generates a square wave signal used for experimental development. 2. Used to drive a stepper motor for generating a square wave drive signal. 3. Generate adjustable pulse for MCU. 4. Generate adjustable pulse,to control circuitry associated. 5. Size: 31mm x 22mm 6. Main chip: NE555 7. Input Voltage: 5V-15V DC. When power supply is 5V, the output current can be 15 MA around; when 12V power supply, the output current can 35 MA around 8. Input current: >=100 MA 9. Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different) 10. Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%) 11. Output with LED indication(low level,LED will on; high level,LED will off;low frequency, the LED flashes) 12. The output frequency range is selectable: LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz 13.The output duty cycle can fine-tune; duty cycle and frequency is not separately adjustable; adjusting the duty cycle will change the frequency Package included: 5 x NE555 Pulse Frequency Duty Cycle Adjustable Module

5Pcs 3.3-5V Passive Buzzer Alarm Module For Arduino Descriptions: Work Voltage: 3.3-5V With fixed bolt hole for easy installation PCB Dimension: 3.3 x 1.3cm DuPont line length: 21cm Module adopts 9012 transistor drive Feature: No oscillation source, need square wave (frequency 2K-5K) to drive. Sound frequency control, you can make a "do re mi fa sol la si" effect. Pin Definitions: VCC: 3.3V-5V GND: The Ground I/O: I/O Interface of SCM Package included: 5 x Passive Buzzer Module 5 x 3pin DuPont line

5Pcs MAX7219 Dot Matrix Module MCU LED Control Module Kit For Arduino Specifications: A single module can drive an 8 x 8 common cathode lattice Operating voltage: 5V Size: 5 x 3.2 x 1.5 cm (L x W x H) LED color: Red With four screws hole, aperture 3mm With input and output interfaces, supports multiple modules cascade Wiring instructions: 1. The module left side as an input port and the output port on the right 2. To control a single module, just connect the input port to the CPU 3. When cascading multiple modules, the input port of the first module connect to the CPU, the output port connect to the input port of the second one, and so on. In the case of 51 MCU: VCC → 5V GND → GND DIN → P22 CS → P21 CLK → P20 Note: 1. VCC and GND is not reversed, it would burn the chip! 2. When the 51 microcontroller P0 port controlling, must be connected to the pull-up resistor, it is recommended that the resistance of 4.7K--10K 3. Please install lattice into the round hole first, and then insert the round hole to PCB board and weld. Face the side of lattice with words, from left to right pin order is 123456. PCB board 1st pin is square pad! 4. Electrolytic capacitors long-pin as positive, short-pin as negative; ceramic capacitor hsa no positive and negative points Package included: 5 x LED module 5 x Dupont line (5P-20cm)

5Pcs Soil Hygrometer Humidity Detection Moisture Sensor For Arduino Description: This is a summary of the soil moisture sensor can be used to detect moisture, when the soil is dry, the module outputs a high level, whereas output low. Using this sensor make an automatic watering system, so that your garden plants without people to manage. Operating voltage: 3.3V~5V. Adjustable sensitivity (shown in blue digital potentiometer adjustment) Dual output mode,analog output more accurate. A fixed bolt hole for easy installation. With power indicator (red) and digital switching output indicator (green). Having LM393 comparator chip, stable. Panel PCB Dimension: 3cm x 1.5cm. Soil Probe Dimension: 6cm x 2cm. Cable Length: 21cm. VCC: 3.3V-5V. GND: GND. DO: digital output interface(0 and 1). AO: analog output interface. Instructions for Use: 1. Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil. 2. Module to reach the threshold value is set in the soil moisture, DO port output high, when the the soil humidity exceeds a set threshold value, the module D0 output low. 3. The digital output D0 can be connected directly with the microcontroller to detect high and low by the microcontroller to detect soil moisture. 4. The digital outputs DO shop relay module can directly drive the buzzer module, which can form a soil moisture alarm equipment. 5. Analog output AO and AD module connected through the AD converter, you can get more precise values of soil moisture. Package Included: 5 x Soil moisture detector module 5 x Probe 5 x 2P Jumper Cable

5Pcs MAX7219 Red 8 Bit Digital Tube LED Display Module For Arduino MCU Description: MAX7219 is an integrated serial input / output common-cathode display drivers, which connects the microprocessor and 8 bit 7-segment digital LED display, you can also connect a bar graph display or 64 separate LED. Includes an on-chip type B BCD encoders, multi-channel scanning loop, segment word driver, but also a 8x8 static RAM that stores each data. Only one external register is used to set the current of each LED segment. A convenient four-wire serial interface can connect all common microprocessor. Each data can be addressed in the update without rewriting all displays. MAX7219 also allows the user to select each data encoding or no coding. The entire device includes a 150μA low-power shutdown mode, analog and digital brightness control, a scan-limit register allows the user to display 1-8 bit data, there is an all LED light detection mode. Feature: 0.36 inch Common cathode Only need three IO ports can drive 8 bit digital tube The module compatible of 5V / 3.3V microcontroller (51 / AVR / STM32...) PCV board four corners of the fixed copper stud, which can effectively precent short circuit accidents happen Wiring instructions (a program, for example, you can pick any IO port definition can be modified in the program): VCC to 5V, GND to GND, DIN to P00, CLK to P02, CS to P01 Note: VCC and GND do not reversed, it would burn the chip. 51 MCU P0 port requires pull-up resistor, if your device does not have a pull-up resistor can be connected to other ports data lines. Package included: 5 x MAX7219 8 bit digital tube module 20 x Copper pillar 20 x Screws

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