Hemal Electronics

This is DC-DC Boost Module (0.9V~5V) to 5V 600MA USB Step-up Board 5V Output. Great Step-up Module with 0.9-5V input, output 5V for many digital devices, so this is really a great module for designing a portable charger. Useful for your USB charger projects and onboard USB device supply solutions. (ie GoPro cameras)

You can supply it with single-cell LiPO or an AA size batter or others. Two AA batteries can output a current of 500 ~ 600MA, a single AA battery power supply can output 200ma current supply, great for mobile phones camera, single-chip, digital products supply.

1. USB voltage regulator for USB-powered device.
2. This module will bring the USB voltage required for your application at regulated 5V output.
3. Various USB devices need 5V from low voltage batteries.
4. Charge mobile phone/MP4/MP3 from AA battery when traveling

1. The module adopts a high-performance imported chip, performance is superior to the common module.
2. Work with indicator light.
3. Take the USB female, a wide range of Uses.
4. A single AA battery power supply can output a current up to 200~300 ma.
5. Two AA batteries to the output current of 500~600 mA.
6. Work from battery voltage as low as 0.9V, allowing you to maximize battery use.
7. If your USB device is critical on 5V operation you can use this module.

1 x DC-DC 0.9V-5V to 5V 600MA Step-Up Boost USB Module

* Product Images are shown for illustrative purposes only a

LM2596 DC-DC Buck Converter Step Down Power Supply Module with Digital Voltage Display

Features

• Input voltage range:4 40VDC
  
• Output voltage range:1.25-37VDC adjustable
  
• Output current:2A
  
• voltmeter range: 0 to 40V, error 0.1V
  
• Input reverse polarity protection
  
• Built in output short protection function
  
• Built in thermal shutdown function
  
• L x W x H =6.1*3.4*12 cm
  
• Weight: 22g
  
• LED digital voltmeter tube, the accuracy is adjustable function, can be aimed at your multimeter adjustable accurate.
  
• Press the right key to let the display show the input or output voltage. when the right OUT led light, it shows output, the left IN led show input.

2 Channel Logic Level Converter Module is a Bi-directional logic level converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V at the same time. This level converter also works with 2.8V and 1.8V devices.

What really separates this Logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side. The level converter is very easy to use.
The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the ‘HV’ pin, low voltage (3.3V for example) to ‘LV’, and ground from the system to the ‘GND’ pin.

It is an 8 Channel Isolated 5V 10A Relay Module, which can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc. It is also able to control various appliances and other types of equipment with large current. Relay output maximum contact is AC250V 10A and DC 5V 10A. One can connect a microcontroller with standard interface directly to it. Red working status indicator lights are conducive to the safe use. It has a wide range of applications such as all MCU control, industrial sector, PLC control, smart home control.

So, ready to get switching on your Raspberry Pi?! This neat relay module features 8 x 5V relays rated at 10A/250V each. t is designed to switch up to 4 high current (10A) or high voltage (250V) loads with the help of microcontroller!

Each relay can individually switch to on/off state. It only requires a voltage of approx 1.0V to switch the inputs on but can handle input voltages up to 5V. This makes it ideal for 3.3V & 5V devices.

Specifications and Features:-

• One normally closed contact and one normally open contact
  
• Triode drive, increasing relay coil
  
• High impedance controller pin
  
• Pull-down circuit for avoidance of malfunction
  
• Power supply indicator and Control indicator lamp
  
• Channel: 8 channel
  
• Relay Operating Voltage: 5V
  
• Power supply and relay instructions, lit, disconnect is off;
  
• Input signal, signal, common Terminal and start conducting;
  
• Input signal, signal, common Terminal and start conducting;
  
• Useful for appliance control;
  
• DC or AC signal, control, you can control the 220V AC load;
  
• There is a normally open and one normally close contact;
  
• The module is compliant with international safety standards, control and load areas isolation trenches.

• WIDE SUPPLY RANGE: 2.0V to 5.5V
• PROGRAMMABLE DATA RATE: 8SPS to 860SPS
• It has an Internal low-drift voltage reference
• Internal Oscillator.
• Internal PGA.
• I2C INTERFACE : Pin-Selectable Addresses.
• Four single ends Or Two differential inputs.
• Programmable Comparator.
• This board/chip uses I2C 7-bit addresses between 0x48-0x4B, selectable with jumpers
• LOW CURRENT CONSUMPTION: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down

I2C Module has a inbuilt PCF8574 I2C chip that converts I2C serial data to parallel data for the LCD display.        

These modules are currently supplied with a default I2C address of either 0x27 or 0x3F. To determine which version you have check the black I2C adaptor board on the underside of the module. If there a 3 sets of pads labelled A0, A1, & A2 then the default address will be 0x3F. If there are no pads the default address will be 0x27.

The module has a contrast adjustment pot on the underside of the display. This may require adjusting for the screen to display text correctly. 

Features:-

• Operating Voltage: 5V
• Backlight and Contrast is adjusted by potentiometer
• Serial I2C control of LCD display using PCF8574 
  
• Come with 2 IIC interface, which can be connected by Dupont Line or IIC dedicated cable
• Compatible for 16x2 LCD
• This is another great IIC/I2C/TWI/SPI Serial Interface
• With this I2C interface module, you will be able to realize data display via only 2 wires.