low operating voltage: 1.9 ~~ 3.6V low-voltage.
high-rate: 2Mbps, air transmission time is very short, greatly reducing the wireless transmission of collision phenomena (software settings 1Mbps or 2Mbps air transmission rate).
Multi-frequency points: 125 frequency points, to meet the multi-point communications and frequency hopping communications needs.
ultra-compact: built-in 2.4GHz antenna compact 15x29mm (including antenna).
soil humidity module to the environmental humidity is the most sensitive, generally used to detect soil moisture.
module in soil moisture can not reach the setting threshold, DO mouth output high level, when soil moisture more than setting threshold, module D0 output low level;
small plate digital output D0 can be directly connected with the single chip microcomputer, through the single chip microcomputer to detect the high and low level, thus to detect soil moisture;
Stepper Driver A4988 Stepper Motor Driver Module with Heatsink
Low RDS (On) Output
Automatic current decay mode detection / selection
Mix with slow current decay modes
Synchronous rectification for low power dissipation
Internal UVLO
Cross-current protection
3.3 and 5 V compatible logic supply
Conversion efficiency: Up to 92% (output voltage higher, the higher the efficiency)
Switching Frequency: 150KHz
Rectifier: Non-Synchronous Rectification
Module Properties: Non-isolated step-down module (buck)
Short circuit protection: current limiting, since the recovery
Operating temperature: Industrial grade (-40 to +85 ) (output power 10W or less)
Full load temperature rise: 40
Brand new & high quality
Breadboard power supply module, compatible with 5 V, 3.3 V
Apply to MB102 breadboard
Input voltage: 6.5-12 V (DC) or USB power supply
Output voltage: 3.3V/5V can switch over
Maximum output current: <700 ma
Fluctuation two road independent control, can switch over to 0 V, 3.3 V, 5 V
Motor Drive Shield L293D for Arduino Duemilanove Mega / UNO
4-channel DC motor drives, stepper motor or 2 while driving two servos, You can mix:
DC motor driver quad and two steering gear
Drive two DC motor and stepper motor all the way and two-way steering gear
Drive two stepper motors and two servos
Adjust the light soft and stable, no flickering
PWM digital dimming, avoid rush current, protect your LED lights
Mainly use to adjust single color LED light lamps and Led Strip
Max voltage: 16V
Minimum voltage: 5V
Continuous current: 10A
Short maximum current: 20A (less than 10 seconds)
Speed control mode: PWM step-less speed regulation, can also be used to adjust the light
Control mode: speed control potentiometer (clockwise clicked open, continue to rotate clockwise from 1% to 99% speed)
Duty cycle: 0%-99% (0% position is the state of the switch off when the potentiometer is most on the left).
When the current is switched on, the 0.002A (long time no need to switch off the governor is no current).
Efficiency: the maximum efficiency is as high as 98%.
Volume: long 3cm (excluding potentiometer), width 2cm, height 1.4cm
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