Hemal Electronics

• 100% Brand new and high-quality STM32 Board
  
• 72MHz work frequency.
  
• 64K flash memory, 20K SRAM.
  
• 2.0-3.6V power, I/O.
  
• Reset(POR/PDR).
  
• 4-16MHz crystal.
  
• Onboard Mini USB interface, you can give the board power supply and USB communication.

• Profiles: Bluetooth serial port Profile
  
• Bluetooth protocol: Bluetooth Specification v2.0+EDR
  
• Frequency: 2.4GHz ISM band
  
• Modulation: GFSK(Gaussian Frequency Shift Keying)
  
• Emission power: ≤4dBm, Class 2
  
• Sensitivity: ≤-84dBm at 0.1% BER
  
• Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps
  
• Security: Authentication and encryption
• Power supply: +3.3VDC 50mA
  
• Working temperature: -20 ~ +75Centigrade
  
• Dimension: 26.9mm x 13mm x 2.2 mm

• Embedded Projects
  
• Industrial Applications
  
• Computer and portable Devices
  
• GPS receiver

MPU6050 module uses the popular MPU6050 Sensor which includes both a 3 axis accelerometer and a 3 axis gyroscope in a single package.The sensor can be interfaced through a I2C connection which allows an easy and direct interface between the sensor and a micro controller.

The MPU-6000/MPU-6050 family of parts are the world’s first and only 6-axis Motion Tracking devices designed for the low power, low cost, and high performance requirements of smartphones, tablets and wearable sensors.

The 6 Degree of Freedom sensor breakout integrate with the MPU6050 sensor and the low noise 3.3v regulator and pull-up resistors for the I2C bus. So it's available to directly hook up the sensor with the Arduino processors for your robotics,HCI and wearable projects.

Features:-

• Uses the popular MPU6050 IC
• MPU6050 contains a 3 axis Accelerometer and Gyroscope in a single package and simplifies design and usage. It also reduces cross axis alignment issues unlike other sensors with separate accelerometer and gyroscope ICs
• Digital I2C interface to read the output of the sensor
• Input Voltage: 2.3 - 3.4V
• Selectable Solder Jumpers on CLK, FSYNC and AD0
• Tri-Axis angular rate sensor (gyro) with a sensitivity up to 131 LSBs/dps and a full-scale range of ±250, ±500, ±1000, and ±2000dps
• Tri-Axis accelerometer with a programmable full scale range of ±2g, ±4g, ±8g and ±16g
• Embedded algorithms for run-time bias and compass calibration. No user intervention required
• Digital-output temperature sensor

The Latest ESP-12F ESP8266 Wifi Module AP & Station Remote Serial Wireless IoT Board is an integrated chip designed for the needs of a new connected world. It can handle all the necessary overhead for communicating with your network, such as TCP/IP stack and communicating with your 802.11 networks.

It is completely addressable over SPI and UART protocols allowing you to connect your sensors or project directly to it through its GPIO’s. ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and MCU (Micro Controller Unit) capability.

ESP8266 Serial Wifi Wireless Transceiver Module is a self-contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. ESP8266 Serial Wifi Wireless Transceiver Module is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor.

Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that’s just out of the box)! The ESP8266 module is an extremely cost-effective board with a huge, and ever-growing, community.

ESP8266 Serial Wifi Wireless Transceiver Module has a powerful enough onboard processing and storage capability that allows it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, is designed to occupy minimal PCB area. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existence interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions and requires no external RF parts.

Specifications & Features of ESP-12F ESP8266 Wifi Wireless Module:-

• Communication interface voltage: 3.3V
• Working current: 240mA(MAX)
• Serial port baud rate: 115200 (default), can be modified to other values by AT command
• Serial communication format: 8N1
• Wireless Network Mode: station / softAP / SoftAP + station
• Wireless criteria: 802.11 b / g / n
• Compatible with ESP-12 ESP-202
  
• WIFI @ 2.4 GHz, support for WPA / WPA2 security mode
• It is very easy to develop projects with AT commands
• Surface Mount Package with 2mm Pitch Pads
• Mulitple GPIO’s for all your sensor needs
• Wi-Fi Direct (P2P), soft-AP
• Integrated TCP/IP protocol stack
• Integrated TR switch, balun, LNA, power amplifier and matching network
• Integrated PLL, regulators, DCXO and power management units
• +19.5dBm output power
• Power down leakage current of <10uA
• Integrated low power 32-bit CPU could be used as an application processor
• SDIO 1.1/2.0, SPI, UART
• STBC, 1×1 MIMO, 2×1 MIMO
• A-MPDU & A-MSDU aggregation & 0.4ms guard interval
• Wake up and transmit packets in < 2ms
• Standby power consumption of < 1.0mW (DTIM3)
• Both SMD and Inline package are available, and the pin pitch is 2.0mm.

The HM-10 is a readily available Bluetooth 4.0 module, which can configure as either Master or slave. This module is used for establishing wireless data communication. The module is designed by using the Texas Instruments CC2540 or CC2541Bluetooth low energy(BLE) System on Chip (SoC). You can use it simply for a serial port replacement to establish connection between MCU, PC to your embedded project and etc.

• BT Version: BT Specification V4.0 BLE
• Working frequency: 2.4GHz ISM band
• Modulation method: GFSK (Gaussian Frequency Shift Keying)
• RF Power: -23dbm, -6dbm, 0dbm, 6dbm
• Speed: Asynchronous: 2-6K Bytes, Synchronous: 2-6K Bytes
• Security: Authentication and encryption
• Service: 0xFFE0 (Modifiable use AT+UUID command)
• Characteristic: 0xFFE1 (Modifiable use AT+UUID command)
• Characteristic: Notify and Write (Modifiable use AT+UUID command)
• Power: +2.5V~3.5VDC 50mA
• Power: Active state 8.5mA; Sleep state 50~200uA
• Working temperature: –20 ~ +105 Centigrade
• Size: HM-10 27mm x 13mm x 2.2 mm

• Computer and peripheral devices
• Robotics
• Industrial control
• MCU projects

Note 1: Do not attach this device directly to a PC RS232 Port. You will need an RS232 to TTL converter circuit if you need to attach this to a computer

Note 2: I/O Pins are not 5V Tolerant , use level converter for interfacing with 5V Microcontrollers.

Note 3: Both the HM-10 and its clone works in the same manner only the difference is in the terms of AT commands formats.

The ESP-01 ESP8266 Serial WIFI Wireless Transceiver Module is a self-contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that’s just out of the box)! The ESP8266 module is an extremely cost-effective board with a huge, and ever growing, community.

This module has a powerful enough onboard processing and storage capability that allows it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, is designed to occupy minimal PCB area. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existing interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions and requires no external RF parts.

There is an almost limitless fountain of information available for the ESP8266, all of which has been provided by amazing community support. In the Documents section below you will find many resources to aid you in using the ESP8266, even instructions on how to transforming this module into an IoT (Internet of Things) solution!

Note: The ESP8266 Module is not capable of 5-3V logic shifting and will require an external Logic Level Converter. Please do not power it directly from your 5V dev board.

Specifications and Features:-

• 802.11 b/g/n
  
• Wi-Fi Direct (P2P), soft-AP
  
• Integrated TCP/IP protocol stack
  
• Integrated TR switch, balun, LNA, power amplifier and matching network
  
• Integrated PLLs, regulators, DCXO and power management units
  
• +19.5dBm output power in 802.11b mode
  
• Power down leakage current of <10uA
  
• 1MB Flash Memory
  
• Dimensions: 25 x 15 x 11 mm (LxWxH)
  
• PCB Thickness: 1mm
  
• Weight: 2 gm
  
• Integrated low power 32-bit CPU could be used as application processor
  
• SDIO 1.1 / 2.0, SPI, UART
  
• STBC, 1×1 MIMO, 2×1 MIMO
  
• A-MPDU & A-MSDU aggregation & 0.4ms guard interval
  
• Wake up and transmit packets in < 2ms
  
• Standby power consumption of < 1.0mW (DTIM3)

ESP32 Development board is based on the ESP WROOM32 WIFI + BLE Module.It's a low-footprint, minimal system development board powered by the latest ESP-WROOM-32 module and can be easily inserted into a solderless breadboard.

It contains the entire basic support circuitry for the ESP-WROOM-32, including the USB-UART bridge, reset- and boot-mode buttons, LDO regulator and a micro-USB connector. Every important GPIO is available to the developer.

Features:-

• Small volume, easily embeded to other products
  
• Strong function with support LWIP Protocol, Freertos
  
• Suppporting three modes :  AP, STA, and AP+STA
  
• Supporting Lua program, easily to develop
  
• Includes CP2102 USB-UART bridge

ADXL345 is a Breakout board for the Analog Device's ADXL345 triple axis accelerometer. The module is populated with MOSFET based Voltage level conversion circuitry to enable you to interface different type of microcontrollers (3V3 & 5V). Apart from the above all, necessary components like decoupling capacitors ,filter capacitors ,pull up resistors and LED are also populated on board.

It is ideal for motion and acceleration sensing applications.It is a low-power, 3-axis MEMS accelerometer modules with both I2C and SPI interfaces.

The ADXL345 features 4 sensitivity ranges from +/- 2G to +/- 16G. And it supports output data rates ranging from 10Hz to 3200Hz such as the Arduino.

Features:

• Digital Output: SPI / I2C
  
• Low Power Consumption
  
• Compact Accelemotor / inclinometer
  
• 5V/3.3V input support.
  
• PCB Board Size: 28mm x 14 mm
  
• lower pressure drop than the 1117 Onboard RT9161 chip power
  
• ideal for noisy power environment

DXL335 is a Breakout board based on 3 axis ADXL335 IC from Analog Devices. The Accelerometer Module require no external devices and works on 5V power supply. It can be directly interfaced to ADC of a microcontroller without any external components.

This module can be used to sense motion or tilt(in case of non moving) in 3 axis.This is the latest in a long, proven line of Analog Sensors- the holy grail of accelerometers. The ADXL335 is a triple axis MEMS accelerometer with extremely low noise and power consumption - only 320uA! The sensor has a full sensing range of +/-3g The burst echo to return to the sensor. By measuring the echo pulse width, the distance to target can easily be calculated.

Features of  ADXL335:

• 3-axis sensing.
• Small, low profile package.
• 4 mm × 4 mm × 1.45 mm LFCSP.
• Low power : 350 μA (typical).
• Single-supply operation: 1.8 V to 3.6 V.
• 10,000 g shock survival.
• Excellent temperature stability.
• BW adjustment with a single capacitor per axis.
• RoHS/WEEE lead-free compliant.

Applications of ADXL335:

• Cost sensitive, low power, motion- and tilt-sensing applications.
• Mobile devices.
• Gaming systems.
• DIY projects requiring orientation information.

Voltage Sensor is a precise low cost sensor for measuring voltage. It is based on principle of resistive voltage divider design. It can make the red terminal connector input voltage to 5 times smaller. Arduino analog input voltages up to 5V, the voltage detection module input voltage not greater than 5Vx5=25V (if using 3.3V systems, input voltage not greater than 3.3Vx5=16.5V).

Arduino AVR chips have 10-bit AD, so this module simulates a resolution of 0.00489V (5V/1023), so the minimum voltage of input voltage detection module is 0.00489Vx5=0.02445V.

Features:-

• Voltage input range: DC 0-25V
• Voltage detection range: DC 0.02445V-25V
• Voltage Analog Resolution: 0.00489V
• DC input connector: Terminal cathode connected to VCC, GND negative pole
• Output interface: "+" connect 5/3.3V, "-" connect GND, "s" connect the Arduino AD pins

We provide most superior quality Water Level Sensor with the most premium standards & performance available

Features:

·         Manages over pressure burdens

·         Corrosion resistant

·         Low power consumption

·         Correct actuator

·         Small in structure

·         Little contact gap

This hybrid RF Transceiver Module provides a complete RF transmitter and receiver module solution which can be used to transmit data at up to 3KHz from any standard CMOS/TTL source.

The transmitter module is very simple to operate and offers low current consumption (typical. 11mA). Data can be supplied directly from a microprocessor or encoding device, thus keeping the component count down and ensuring a low hardware cost.

The RX – ASK is an ASK Hybrid receiver module. The RF Transmitter Receiver Module is an effective low-cost solution for using 433 MHz. The TX-ASK is an ASK hybrid transmitter module. TX-ASK is designed by the saw resonator, with an effective low cost, small size and simple to use for designing.

Specifications of 433MHz RF Transmitter Receiver Wireless Module:-

• Range in open space(Standard Conditions) : 100 Meters
  
• RX Receiver Frequency : 433 MHz
  
• RX Typical Sensitivity : 105 Dbm
  
• RX Supply Current : 3.5 mA
  
• RX IF Frequency : 1MHz
  
• RX Operating Voltage : 5V
  
• TX Frequency Range : 433.92 MHz
  
• TX Supply Voltage : 3V ~ 6V
  
• TX Out Put Power : 4 ~ 12 Dbm
  

Features of 433MHz RF Transmitter Receiver Wireless Module:-

• Low Power Consumption
  
• Easy For RF based Application
  
• Complete Radio Transmitter
  
• Transmit Range Up To 50m
  
• CMOS / TTL Input
  
• No Adjustable Components
  
• Very Stable Operating Frequency
  
• Low Current Consumption (Typ 11mA)
  
• Wide Operating Voltage
  
• ASK Modulation

The LiPo Battery Voltage Checker 1S-8S with Buzzer is a quality product available and a special design to measure and display the voltage of LiPo battery packs. This voltage checker can measure the voltage of the battery pack as well as the voltage of every single cell of the battery pack.

This unit also features a handy built-in LED display that will show the voltage of each cell followed by the overall voltage of the pack. Don’t risk your model by flying on depleted batteries, at this price piece of mind flying can’t be any cheaper!

Simply connect the battery balance plug to the leads of this voltage checker, it will show the instant voltage of each cell one by one ending with displaying the voltage of the total pack. The Li-PO Voltage Checker 1S-8S with Buzzer Alarm is equipped with loud twin piezo alarms which will notify you once your cells reach a low voltage or user defined voltage.

You can customize the alarm to sound at a voltage between 2.7v-3.8v per cell in 0.10v increments. It has a mode button at the top for setting the desired voltage value.