Shreemay Enterprises

The Raspberry Pi 4 Model B is the newest Raspberry Pi computer made, and the Pi Foundation knows you can always make a good thing better! And what could make the Pi 4 better than the 3? How about a faster processor, USB 3.0 ports, and updated Gigabit Ethernet chip with PoE capability? Good guess - that''s exactly what they did!

The Raspberry Pi 4 is the latest product in the Raspberry Pi range, boasting an updated 64-bit quad core processor running at 1.5GHz with built-in metal heatsink, USB 3 ports, dual-band 2.4GHz and 5GHz wireless LAN, faster Gigabit Ethernet, and PoE capability via a separate PoE HAT.

This version has 1 GB of RAM, we also have 2 GB and 4 GB versions.

You can still use all your favorite Raspbian or PIXEL software with this update. You MUST make sure to upgrade your Raspbian operating system install to the latest version so that the firmware can support the new chips! Old SD cards from previous releases will not work without a upgrade!

The dual-band wireless LAN comes with modular compliance certification, that''s the metal tin in the corner of the Pi, with the logo stamped on it. This allows the board to be designed into end products with significantly reduced wireless LAN compliance testing, improving both cost and time to market.

What’s New in Raspberry Pi 4 B?

1. 1GB/2GB/4GB Varients
2. Quad-Core 64-bit Broadcom 2711, Cortex A72  Processor
3. WLAN 802.11 b/g/n/ac (2,4 + 5,0 GHz)
4. LAN RJ45 10/100/1000 Mbit (Gigabit LAN over USB 3.0)
5. Operating Power 5V@3A  via USB Type-C Port
6. Dual-Display Micro HDMI Ports which supports H 265 Decode for 4K Video @60p

Additional Information:

• Delivery Time: 1

Through the potentiometer adjusting soil moisture threshold control, automatic in garden, garden automatic watering, family flowerpot soil humidity control, all kinds of electronic games, with high power relay, can control large current device, less than setting humidity automatic start relay, greater than setting humidity automatically disconnect and delay function, without delay of critical humidity state relay don’t stop flicker problem solving is a simple and practical soil humidity control system.

Humidity is lower than the set humidity start referring to is when soil moisture is lower than setting humidity, the relay will automatically pull in, start the spray, water pumps, etc. do humidifying movement, reaches the desired humidity automatically stop.

Features

1. Using the company’s production of high-quality soil sensor for detection of soil moisture, and the surface of the nickel plating, widening of the sensing area can improve conductive properties, prevent soil contact is easy to rust, prolong service life.
2. The product can be a wide range of control soil humidity and control the corresponding threshold value by adjusting the potentiometer and the humidity is lower than set value, start relay, is higher than the set value, the relay is switched off.
3. Product with the function of time delay, delay 3-5 seconds when detected humidity in the critical state, relay will not blink, stroboscopic phenomenon.
4. Products using high quality relay, can withstand the load of 1500W to meet the requirements of most people.
5. Products with power indicator and indicator relay.

Module Instructions

1. Sensors applied to the detection of soil moisture;
2. Blue potentiometer is used to soil moisture threshold adjustment, clockwise adjustment and control the humidity will be bigger, counterclockwise smaller;
3. Due to the module with delay function, adjust the humidity value, once every tune need to wait about 5-8 seconds, see the change of the relay, the green LED lamp also has the corresponding change, until adjusted to meet the requirements.

Package Includes

• 1 x Soil moisture control module and soil sensor
• 2 x 20cm long DuPont line

BMS (Battery Management System) – a battery management system that is designed to monitor the status of batteries, control the process of charging/discharging the battery, etc.

This BMS charge-discharge controller module comes with pre-soldered nickel strip ready to use for a single 18650 rechargeable cell. The module has protection against short circuit, overcharge and over-discharge. One of the functions of the charge controller is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. This BMS controller is designed for more than 30,000 hours of operation. The maximum allowable current is 5A.

If the maximum permissible value of the supply voltage is exceeded, the charge controller activates the “protection” mode. In order to restore the module, it is necessary to re-apply voltage to the input of the BMS board or wait a while until the charge controller automatically disables protection.

 x 3.7V 18650 Lithium Polymer (Li-Po) Battery Holder (3 Cell 3.7V 18650 Lithium Polymer (Lipo) Battery Holder)

* Product Images are shown for illustrative purposes only and may differ from actual product.

Product Description

Features 

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

Package Includes

• 1 x  8 Channel Isolated 5V 10A Relay Module

1. This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers
2. Terminal block for power input (or you can use the 0.1″ breakouts on the side)
3. Reverse polarity protection on the terminal block input
4. Green power-good LED
5. 3 pin connectors in groups of 4 so you can plug in 16 servos at once (Servo plugs are slightly wider than 0.1″ so you can only stack 4 next to each other on 0.1″ header
6. “Chain-able” design
7. A spot to place a big capacitor on the V+ line (in case you need it)
8. 220 ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial
9. Solder jumpers for the 6 address select pins
10. i2c-controlled PWM driver with a built in clock. Unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running!
11. It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages)
12. 6 address select pins so you can wire up to 62 of these on a single i2c bus, a total of 992 outputs – that’s a lot of servos or LEDs
13. Adjustable frequency PWM up to about 1.6 KHz
14. 12-bit resolution for each output – for servos, that means about 4us resolution at 60Hz update rate
15. Configurable push-pull or open-drain output
16. Output enable pin to quickly disable all the outputs