Reviews Digital Talking Module

ACEIRMC 4pcs Si7021 GY-21 SHT21 HTU21 Digital Humidity Temperature Sensor Module Replace SHT11 SHT15

The humidity and temperature sensor board that carries a digital SHT21 humidity and temperature sensor from Sensirion..
Si7021 GY-21 Module Industrial High Precision Humidity Sensor I2C IIC Interface Module For Arduino Low Power CMOS IC Module.
It has a 4-pin interface that can communicate directly with the analog pins.
It can be used as a hardware- and software-compatible drop-in upgrade for existing RH/temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing over a wider range and lower power consumption..
The Si7021 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring humidity, dew-point, and temperature, in applications ranging from HVAC/R and asset tracking to industrial and consumer platforms..

Good performance: thanks to the DSP and PLL technology, these multi-functional stereo FM transmitter modules can provide you with quality stereo.
Practical design: the FM transmitter module has a blue backlit LCD display, allowing you to clearly see the value in a dark environment.
The power consumption is extremely low, and noise interference is small.
Suitable for: this digital FM transmitter supports line/USB/mic channel input, its transmitting frequency range is 76.0~108.0 MHz, and the frequency response range is from 50 Hz to 18 KHz.
Frequency adjustment stepping is 0.1 MHz/ times when short press the key and 1.0 MHz/ times for long press.
Wide uses: the digital FM transmitter module can be applied to FM wireless, USB PC broadcast, maternal and child monitoring, wireless microphone and much more.
Warm notice: please confirm whether the power polarity and power voltage are correct before turning on the power.
If the input voltage exceeds 5V or the positive and negative poles of the power supply are connected reversely, it may cause permanent destroy to the module.
Do not touch the components on the back of the module while working, so as not to affect the normal operation of the module.

An MT2 Over-the-Air (OTA) Module to connect your over-the-air (OTA) antenna directly to your ViP222k or ViP722k DVR satellite receiver.
View local, digital, over-the-air channels directly through your satellite receiver by integrating the OTA channels into your Program Guide..
An OTA antenna must be installed to use the Module..
A satellite signal and a DISH Network programming subscription is required to operate the OTA module..

Normally Open Interfaces Maximum Load : AC 250V/10A, DC 30V/10A.
2 Channel Relay Module 5V Comes with High-Current Relay,Trigger Current : 5mA.
5V Relay Module is 2 Channel Isolated, Each Relay Can Individually Switch On/Off by An Opto-Isolated Digital Input.
Relay Module Designed With Fault-Tolerant , Even If The Control Line Breaks, The Relay Will Not Move.
With Optical Coupling Isolation,Triggering More Reliable and Stable.
2 Channel Module Equipped With Screwed Terminal Plate and Fixed Bolt Holes,Standard Interface Can Connect With Microcontrollers and be Controlled by a Wide Range of Microcontrollers.

It boasts 24 channels with a faster baud rate and lower latency equipped with a high-speed module digital interface..
High-speed module digital interface with installed ACCESS protocol.
MC12P all CNC digital higher accuracy ten bearings hall sensor gimbals and extendable stick ends.
Supports 2S Li-battery balancing charge with Mini USB interface.
Easily accessible battery compartment (*Batteries not included).

PAL B/G RF coax demodulator for converting the foreign PAL B/G type RF coax cable TV signals into either 1080p HDMI or DVI output at 1920x1080 pixels.....
Premium external TV tuner module for MATV/SMATV systems used in campus, classrooms, hotels, hospitals, sports bars or restaurants. Full-frequency PAL....
External add-on TV tuner module for LCD TV, HD monitor/projector without coax inputs. Advanced HD video processor with digital comb filter for smooth....
Great RF coax to HDMI audio decoder for streamline setup with new home A/V receiver or home theater system. Easy operation control via IR remote....
Digital LED screen for TV channel display on the front panel of the module to show users the TV channel selected. Automatic video/audio gain control....

This MEGA Sensor Shield V2.0 dedicated sensor expansion board assembly market a variety of advantages in one of the expansion board design, PCB Immersion Gold processing technology..
Board not only all digital and analog interface to the steering gear line order form extended out, but also ad hoc Bluetooth module communication interface, SD card module communication interface, APC220 wireless RF module communication interface, and RB URF v1.1 ultrasonic sensor interface, independent expansion a more easy and convenient..
For beginners, do not have to worry about cumbersome and complex circuit connection, will simplify this circuit sensor expansion board in the true sense, it can often be easily connected with the sensor..
A sensor requires only a general 3P sensor cable (regardless of digital cable and analog cable), complete the circuit connection, the preparation of the corresponding program downloaded to MEGA controller reads the sensor data, or receive wireless module back pass data through the arithmetic processing, the final easy to complete your own interactive works..
Sensor Shield allows you to connect to various modules like sensors, servos, relays, buttons, potentiometers..

Built-in Bluetooth Wireless technology for hands-free talking and audio streaming.
In-Dash Mechless FM/Digital Media Car Stereo Receiver (No CD).
Electronic Shock Protection (ESP) provides continuous uninterrupted play.
Front USB Input: USB port allows connection to digital devices.
Includes a built-in microphone for clear, convenient, distortion-free talking.

[Specifications] This is a basic 4-digit 7-segment Led display clock module, the LEDs are blue..
[Compatibility] This clock module uses TM1637 IC, it compatible with Raspberry Pi and Arduino.
[Easy to Use] The clock module connected to digital I/O via 2 pins..
[Easy to Install] This LED display designed with 4 mounting holes for easy installation..
[High Quality] The clock module is made of high quality electronic components, stable and reliable performance.