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3Pcs 3V To 5V 1A USB Charger DC-DC Converter Step Up Boost Module Features: Module uses the Taiwan production boost chip, high efficiency (up to 92%), plus built-in over-current protection chip, can be more good to protect the module and use the device after the class. Module with undervoltage protection, undervoltage protection into state below 2.5V, can be more better protect the battery, to avoid excessive discharge. Module can modify the fixed resistor adjusts the output voltage can be adjusted up to 12V output, but to ensure that the output power of less than 5W. This module uses TDK multilayer ceramic capacitors as main filter capacitor, the output ripple can be as low as 20mV (5V1A output case)! This module uses a standard USB interface, you can use all universal USB charging mobile phones, MP3, MP4 and other equipment, the perfect support for IPHONE and other mobile phone. Specification: Module properties: Non-isolated step-up module (BOOST) Input voltage: 2.5-6V Output voltage: 4-12 V(Adjustable, the default 5 v) Output current: 1000mA (Max) Efficiency: 92%(Max) (the higher the input voltage, the higher the efficiency) Switching frequency: 1MHz Output ripple: 20mV (MAX) Operating temperature: Industrial (-40°c to +85°c) Voltage regulation: ±2.5% Short circuit protection: None (please use the lithium battery with protection) Input: IN + postive, IN - negative Output: USB output Size: 3 x 1.3 x 0.8 cm Application: This module can be used for DIY mobile power output, enabling single or two ordinary lithium battery to 5V boost to the mobile phone or PSP device charging. DIY a mobile power supply, only need one battery, you can output 5V voltage for your phone, MP3, MP4, PSP charger, very easy. In order to power your electronic devices when your device needs 5V power supply, when you only have lithium battery, this module can be directly step-up to 5V, solve your problems. Note: This module is a fixed 5V output module Modules indicated above IN - (negative input), IN + (positive input), OUT-(negative output), OUT + (positive output) must be connected correctly, otherwise it may cause damage to the module This module has an LED light, when the charge when the LED lights can be used as indicator Package included: 3 x USB boost module

3Pcs 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: 3 x MAX7219 8 bit digital tube module 12 x Copper pillar 12 x Screws

Description: This is an easy make four-layer round led dimensional cylinder kit, it's all use DIP components. It has more than 20 kinds of special led gradient effect. Some kinds of the effect is star-flashing and lightning effect, it also has many spin move effect and led breathing effect. All of the effects is gradual change light up instead of directly light up, that makes the led animation looks more gentle. you can hang it up on the christmas tree to simulate the star flashing effect. Soldering grids of each led layer greehand would look terrible. It has a dual use round acrylic that can as a template to hold the led in place, that help you to solder each layer of the led grids more accurate and the same level. On the other hand it also use as a case to reinforce the bottom. This acrylic template is important for quality soldering, it makes the led cylinder easier and more precise. How to assemble it, click here ! Features: Using 32 Milky 5mm Highlighted Long Pin LED Display 23 Kind of LED Gradient Effect to Simulate the Star-Flashing or Lightning and other 3D LED circle Effect Each Animation has so many Random function Alll using DIP components to build,suitable for beginners Blue Round PCB Acrylic Template to help aligning the led grids to solder Switch Button to Switch the next effect Reinforce the Bottom by the Dual Use Round Acrylic Double Power Supply Option: Micro USB cable or Wire Connect Use Micro USB Cable to Connect a computer or phone charger to Supply it with the 5V Color: blue Dimensions: 43mm x 43mm x 105mm Function: 1. Use micro usb cable or power wire to supply 5V power; 2. Toggle the switch button to switch the next animation effect. Package included: 3 x DIY Blue Mini Star Flashing LED Cylinder Kit

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA 3Pcs Low Voltage DC 1.8V 3V 5V 6V 12V 2A Motor Speed Controller PWM 1803B Specification: Input supply voltage: 1.8V-15VDC The max output power: 30W The max continuous output current:2A Duty Cycle adjustable: 0%-100% Size: 32*32*15mm Features: This Brand New 1803B DC Motor Speed Controller allows controlling the direction of a DC the motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully the product adjust from 0%-100%. With a self-recovery fuse 2A and a Power-On LED light. Enable to provide a continuous current of 2A to your DC motor or other DC load. Package included: 3 x motor speed controller 3Pcs Low Voltage DC 1.8V 3V 5V 6V 12V 2A Motor Speed Controller PWM 1803B 3Pcs Low Voltage DC 1.8V 3V 5V 6V 12V 2A Motor Speed Controller PWM 1803B 3Pcs Low Voltage DC 1.8V 3V 5V 6V 12V 2A Motor Speed Controller PWM 1803B

Specifications: Working voltage: DC 3.8V-5.5V Working current (5V): typical current 6mA Input and output signals (3 lines): GND, VCC is power, and VCC is 3.8V-5.5V Obstacle detection time (range from obstacle-free to obstacle-free or obstacle-free to obstacle-free): Working Principle: Sensors actively emit infrared light, according to reflected light detection, if detected obstacles, OUT foot output 0, otherwise 1. Detection distance (test environment, indoor, maximum power, Voltage 5V, power consumption 6.5ma): 1. white walls: 100cm 2. IBM black computer cover: 20cm 3.1 fingers: 18cm 4. palm: 30cm 5. a transparent pearl pen: 20cm Features: The new version has been greatly improved and has been gradually improving. 1. super miniature and designed with mechanical mounting holes. 2. Low power consumption, wide operating voltage range. The transmitting signal adopts modulation signal, long distance, good anti-jamming, and can work outdoors under non-direct sunlight (the distance will be shorter). 3. distance adjustable, ranging from 3cm-100cm. 4. Obstacle avoidance uses window technology to avoid the problem of critical zone. The sensor works stably. The user can directly use the output signal without considering the signal jumping. Usage: There are many precise adjustable potentiometers on the board, which can be adjusted according to the use environment. The adjusting range is from 3cm to 100cm. Because it is a reflection principle, it is related to the specific reflection target and can be adjusted according to the situation. The circuit board has a red LED that emits light when obstacles are detected. OUT output continues to be low. Obstacle-free is OUT output continues to be high. Sensor active infrared reflectance detection, so the reflectance and shape of the target is the key to the detection range, in which the black detection range is the smallest, the white is the largest; small area object distance, large area distance. Package Included: 3 x Obstacle Avoidance Sensor

Specification: Modle: YS-04 Name: Step down voltmeter module Input voltage: DC 4.5 ~ 40V Output voltage: 5V (when the input voltage is between 6.5V ~ 40V) Output current: 2A Size: approx 5.7 x 2 x 1cm(L x W x H) Application: can be used on car, electric bike, motorcycle for voltage measurement and to charge phone, iPad, Mp3 etc. Feature: The voltmeter has automatic calibration function. With reverse connection protection. With overheat protection and short circuit protection. With USB power indicator light. High efficiency and low ripple. Instructions: When you need to charge the mobile phone, Ipad, MP3 and other digital products, touch the "output enable" button, then the USB power indicator light on, the USB output voltage 5V; When you need to turn off the digital tube, touch the "low power" button, then the module into the ultra-low power standby mode, USB output is also turned off accordingly. Package included: 3 x Step down voltmeter module

Specification:   Small size: 11mm*27mm  Low power consumption: Supply voltage 2.5V ~ 5V, operating current is microamps  Linear Good  High Sensitivity  High stability  Detection range: 240nm-370nm  Large angle: 130 degrees  The Schottky type of photodiode for photoelectric mode   Typical applications:   UV tester, UV watch, outdoor sports equipment, mobile phones and other mobile phones    Package included:   3 x GUVA-S12SD UV Detection Sensor

Features: 1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions 2. there are four screw holes for easy positioning 3. Analog output voltage with the higher concentration of higher voltage 4. TTL output valid signal is low. (Low-level signal when the output light can be directly connected to the microcontroller or relay module) 5. The switching signal having a DO (TTL) output and analog output AO Special note: After the sensor is powered, needs wait about 20S, measured data was stable, heat sensor is a normal phenomenon, because the internal heating wire. Specifications: Size: 32 x 22 x 27mm Chip: LM393, ZYMQ-2 gas sensors Working voltage: DC 5V AO output:0.1-0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V DO output: TTL digital 0 and 1 (0.1 and 5V) Input voltage: DC 5V Power consumption (current): 150mA Package included: 3 x MQ-2 gas sensor module

Description: 1. onboard AMS1117-5.0 chip 2. onboard DC input voltage range of 6.5 V to 12 V 3. onboard 7 * 7 self-locking switch, convenient to control power supply turned on and off during the test 4. onboard power light, indicating whether the power supply 5. 4-way output voltage interface, convenient connection during the test 6. board size: 48.5 (mm) x12.5 (mm) Package included: 3 x AMS1117 5V Power Supply Module With DC Socket And Switch

Feature: The power supply is fully isolated industrial grade built-in power module with temperature protection, overcurrent protection and short circuit full protection, AC85 ~ 265V wide voltage input, high and low voltage isolation, DC12V1A 5V1A dual isolated output voltage, 431 regulated, output with EMI filter circuit, with light, with mounting holes, cost-effective. Specification: Working temperature: -20 ??to 60 ??br />Relative humidity: 40% RH - 90% RH Input voltage range: 85V - 265V (typical: 110/220) (under full load conditions) Input Current: 0.027 (AC110V) 0.0136 (AC220V) (under full load conditions) Input surge current: 20A (under full load conditions) Size: 7.5 x 4.0 x 4.0 (cm) Output regulation characteristic: Output voltage Minimum current Maximum current Peak current Output voltage range Ripple +12V 0A 1A 1.2A 11.80~12.5V 150mV +5V 0A 1A 1.2A 4.90~5.1V 80mV Other output characteristics: Item Unit Min Typical values Max Test Conditions Output Power W 0 17 18.5 DC output power Output efficiency % 84 Rated load Boot shutdown overshoot % 10