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L298N driver module, using ST's L298N chip can directly drive two 3-30V DC motor, and provides a 5V output interface can 5V single-chip circuitry to supply, support 3.3VMCU control, you can easily control the DC motor speed and direction, you can also control the 2-phase stepper motor, smart car is essential.
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This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. There's an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. The sensor comes with three wires: red (5-24VDC power), black (ground) and yellow (Hall effect pulse output). By counting the pulses from the output of the sensor, you can easily calculate water flow. Each pulse is approximately 2.25 milliliters. Note this isn't a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure and sensor orientation. It will need careful calibration if better than 10% precision is required. However, its great for basic measurement tasks!
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Features: *Size: 50 x 26 x 15mm (excluding propellers) *Propeller diameter: 75mm *Operating voltage: 5V *L9110 driver can control reversing, with mounting holes, compatible steering rudder control, quality and high efficiency propeller. *Can easily blow out the flame lighters 20m away, can be used for fire fighting robot, it is essential for robot design and development.
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Features: -With relay output, this module is used to detect the humidity and control related the device power directly. -This product make use of HR202 humidity sensor. -The comparator outputs drive relays directly. It connects to 220V AC or other devices. -With leads, sensor interface can be installed with pin. -It's easy to install with 4 0.3cm fixing bolt hole. -When ambient humidity exceeds the setting threshold value the relay sucks and shuts, what's more, the common terminal connects to the start. -If the ambient humidity below the setting threshold value, the situation will be counter. -Common, normally open and normally closed the three ports are equivalent to a dual-control switch. -When the relay coil is electrified, the common will connect to the normally open, otherwise, the common will connect to normally closed.
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ESP-07 WiFi module is developed by Ai-thinker Team. core processor ESP8266 in smaller sizes of the module encapsulates Tensilica L106 integrates industry-leading ultra low power 32-bit MCU micro, with the 16-bit short mode, Clock speed support 80 MHz, 160 MHz, supports the RTOS, integrated Wi-Fi MAC/BB/RF/PA/LNA, on-board antenna. The module supports standard IEEE802.11 b/g/n agreement, complete TCP/IP protocol stack. Users can use the add modules to an existing device networking, or building a separate network controller.
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The PCF8591 is a single-chip, single-supply low-power 8-bit CMOS data acquisition device with four analog inputs, one analog output and a serial I2C-bus interface. Three address pins A0, A1 and A2 are used for programming the hardware address, allowing the use of up to eight devices connected to the I2C-bus without additional hardware. Address, control and data to and from the device are transferred serially via the two-line bidirectional I2C-bus.
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Module description:
1 On board ATMega8A-AU chip 2 With power supply and two lights burning 3 Onboard 500mA PPTC overcurrent protection 4 On the target board support 5V and 3.3V powered byNo need to install drivers
The model from the latest applicable automatic speed control.
Suitable for WIN8.1 / 8/7 / XP32 bit / 64-bit computer systems.
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Product description: Description: stm32f103c8t6 Minimum System Board, Beginner Level Board! Also, keil arm compiler, jlink, serial download, upgrade from 51 to arm, original chip, stable and high quality, easy to use, exclusive design and development, technical support well! Purchase. Features: stm32f103c8t6 Minimum System Learning Development Board Power supply voltage: 1. USB - 5 V 2.5 Volt front row power supply 3.3 V power supply option Typical application: led flashing light program (support various other programs) Main resources: 1. USB function 2. user led 3. power led 4. reset Maximum features: 1. compact design, easy to carry 2. full gold leaf in the front row 3. switch for imported material, etc. Dimension: 4.5 cm * 6.2 cm