5 STARS PRODUCTS
Products with all positive feedbacks
Soil moisture sensors measure the volumetric water content of the soil by measuring the dielectric constant of the soil.
HC-SR04 Ultrasonic Sensor
HC-SR04 Ultrasonic Sensor is an ultrasonic ranging sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver, and a control circuit. There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground).
Earth Resistance Tester
Earth ground tester generates a known current through the two outer ground stakes and the drop in voltage potential is measured between the two inner ground stakes. The tester automatically calculates the soil resistance using Ohm's Law (V=IR).
4-channel 24V Relay
This is a 4-Channel DC 24V Relay Module High/Low Level Triggering Optocoupler Isolation. Using high-power relay, the maximum control load DC 30V 30A / AC 250V 30A. ... Each channel has a relay on LED indication.
Raspberry Pi 3 Model B Plus Kit
Raspberry Pi 3 Model B Plus Board:
- The updated Pi 3 Model B plus design is based around a B plus Broadcom BCM2836 SoC, which includes a Quad-Core ARM7 900 MHz processor
- Processor: ARM7 900MHz CPU
- USB: 4 x USB Ports
- Ethernet: 10/100 Ethernet Port
- Video Output: HDMI and Composite
- Sound: L/R Stereo
- Memory: 1.4 GB Ram
- Operating System: Uses micro SD card slot to load O/S
- Digital interfaces: 2 onboard ribbon slots for Camera and Display
- GPIO: 40 GPIO pins, backward compatible to B and B+ board
- Micro SD port for loading your operating system and storing data
- Power Supply: External 5V
- I/O Operation Level: 3.3V
- Board Size: 85mm*56mm*1.6mm
- Only Model B plus board