NE555 Adjustable Frequency Pulse Generator Module Features:

• Adjustable Frequency: Easily adjust the output pulse frequency using the onboard potentiometer.
• Wide Frequency Range: Supports a wide range of frequencies, making it suitable for various applications.
• Stable Output: Ensures consistent and reliable pulse generation.
• User-Friendly Design: Equipped with terminal blocks and a clear layout for easy connections.
• Compact Size: Small and lightweight for integration into compact projects.

NE555 Adjustable Frequency Pulse Generator Module Specifications:

• IC Used: NE555 Timer
• Operating Voltage: 5V–12V DC
• Output Signal Type: Square wave
• Frequency Range: 1Hz to 100kHz (adjustable)

Package Includes:

1 x NE555 Adjustable Frequency Pulse Generator Module

– The ADC bit rate: 16
– Interface type: I2C
– Channel: 4-way AN0 AN1 AN2 AN3 differential input or 2 road
– The input voltage: 2.0 to 5.5 v
– Channel 0 to VDD input voltage

Other features:

1, low current consumption, minimum 150ua
2, the sampling rate of 8-860 SPS SPS
3, internal wave voltage benchmark in low temperature
4, internal programmable gain amplifier
5, the internal oscillator
6 programming control, input range, 7 kinds of optional input range: 0.256 V ~ + 0.256 V, 0.256 V ~ + 0.512 V, 0.512 V ~ + 1.024 V, 1.024 V ~ + 2.048 V, 2.048 V ~ ~ + + 4.096 V, 4.096 V to 6.144 V
7, the I2C 7 – bit addresses x4b x48 between 0-0
8, can provide the uino routines and libraries
9. Size: 18 mm * 28 mm

The power supply of this product is wide voltage (3.0V~30V), 3.3V system and 5.0V system compatible, 3.3V and 5.0V signals can match. This product with a terminal block and silicone wire, direct wiring use, all imported original chip, powerful, protection design, anti-interference ability, industrial, quality assurance 1 year!

This transmission module to achieve the TTL signal and RS485 signal interchange, but we must know, 485 is half duplex communication, this communication can achieve two-way communication, but not in both directions at the same time, must Alternately; that is, each section of the communication channel can be either a transmitting end or a receiving end, but at the same time, the information can have only one transmission direction.

To achieve the RS485 signal automatic flow control, send and receive direction automatically switch, use this module with your operation as simple as the serial port .

Baud rate: 110 ~ 256000bps

Product Parameter

1. wide voltage power supply (3.0V ~ 30V), the limit voltage of 33V, it is recommended to use within 30V, the minimum voltage is higher than 2.8V.

2. compatible with 3.3V and 5.0V signals, can match the module.

3. has a very high EMC and EMI performance.

4. the use of imported chips, industrial design, anti-interference ability, while the use of powerful 485 design, industrial and field can be used in harsh environments, the working temperature of -40 ° to +85 °, transmission Distance up to kilometers (with 850 meters of 2 * 1.5 cable to do the test, it is recommended to use within 800 meters, more than 800 meters plus repeaters).

5. with a terminal block and silicone wire, the use of very convenient.

6. with RXD, TXD signal indicator, send and receive situation panoramic view.

7. factory direct, to ensure technical support and services, but also OEM and ODM.

Product Features

1. This module fully considered the 485 bus protection design and anti-jamming design, high EMC, EMI performance, long-distance transmission in the field, the module “access to the earth” side access to the earth, can play well The anti-interference and protection of the role of the 485 bus more secure; indoor short-distance transmission can not access the earth.

2. with a standard 2.54 pitch pin, to facilitate your secondary development.

3. with 120 ohm matching resistance, shorted R0 can be enabled to match the resistance, long-distance transmission recommended shorted.

4. support multi-machine communication, the same network can connect at least 40 nodes.

5. can be hot-swappable, there will be no signal to death phenomenon.

6.anti-jamming alignment and copper way to prevent interference with the signal.

Features

• Converter is based on the CP2102
• USB-C input
• Serial UART pins broken out (TXD/RXI)
• DTR pin broken out  (No CTS Pin)

Specifications

• Onboard 3v3 regulator for powering microcontrollers (up to 100mA)
• Dimensions: 22 x 16 mm

Voice Recognition Module is a compact and easy to use speech recognition board that can be easily interface easily with Arduino. This product is a speaker dependent voice recognition module. It supports up to 80 voice commands in all. Max 7 voice commands could work at the same time. Any sound could be trained as command. Users need to train the module first before let it recognizing any voice command.

The Voice Recognition Module allows you to control your device using just your voice.

Datasheet:

• Technical Datasheet

Parameter:

• Voltage: 4.5-5.5V
• Current: <40mA
• Digital Interface: 5V TTL level for UART interface and GPIO
• Analog Interface: 3.5mm mono-channel microphone connector + microphone pin interface
• Size: 31mm x 50mm
• Recognition accuracy: 99% (under ideal environment)

Feature:

• Support maximum 80 voice commands, with each voice 1500ms (one or two words speaking)
  Maximum 7 voice commands effective at same time
• Easy Control: UART/GPIO
• User-control General Pin Output
• Recognizer — a container where acting voice commands (max 7) were loaded. It is core part of
  voice recognition module. For example, it works like “playing balls”. You have 80 players in your
  team. But you could not let them all play on the court together. The rule only allows 7 players
  playing on the court. Here the Recognizer is the list which contains names of players working on
  the court.
• Recognizer index — max 7 voice commands could be supported in the recognizer. The
  recognizer has 7 regions for each voice command. One index corresponds to one region: 0~6
• Train — the process of recording your voice commands
• Load — copy trained voice to recognizer
• Voice Command Record — the trained voice command store in flash, number from 0 to 79
• Signature — text comment for record
• Group — help to manage records, each group 7 records. System group and user group are
  supported.

Package Includes

1.  Voice Recognition Module x1
2. Microphone x1

Module characteristics and uses:
To achieve fast turn-on and off the circuit, an unlimited number of switching;
Conducting and cutting process does not produce noise, no spark, no electromagnetic interference;
Compared with electromagnetic relay products, longer life;
The dual-MOS parallel drive, lower resistance, more current, strong power; at room temperature, operating current of up to 15A, power up to 400W, to meet the most use of the equipment;
A method for controlling the motor, lights, LED, DC motors, micro-pumps, solenoid valves, etc., very convenient.
Highlights:

Wide voltage input (5 ~ 36V), most devices can be used, very convenient;
The interface is clear and simple, powerful, easy to understand, meet almost all your needs;
The emergency stop function (“STOP” key);With reverse polarity protection, reverse polarity will not burn the product.
Increase the sleep mode, if this mode is enabled, without any operation within 5 minutes, then automatically turn off the monitor, any key wake-up;
You can set a different OP, CL, LOP parameters, which are independent of each other, and are automatically saved;
After the module is powered down, all parameter settings are not lost.
Operating mode:

P1: trigger signal, the relay is on “OP” time, and then disconnect; in the “OP” time, as follows:
P1.1: signal is triggered again, invalid
P1.2: signal is triggered again, the clock is reset
P1.3: Signal trigger again, relay off, stop the clock;
P-2: trigger signal, the relay off “CL” of time, the relay on “OP” time, and then disconnect relay;
P3.1: trigger signal, the relay is turned on after the “OP” time, the relay off “CL” time, then the operation cycle, if the trigger signal period, the relay off, stop the clock; the number of cycles ( “LOP “) can be set.
P3.2: without triggering signal, the relay is on “OP” time, the relay off “CL” time, and has been cycling; frequency ( “LOP”) cycle can be set;
P-4: signal holding function. If there is a trigger signal timing is cleared, the relay remains on; when the signal disappears, after the timing “OP” time, the relay is; if another signal during timing, timing is cleared;
Product parameters:

1: Operating voltage: 5–36V.
2: Trigger Source: Active-high (3.0V-24V), have optocoupler isolation, can improve the system’s anti-jamming capability (customers can also shorting common ground).
3: Output capacity: DC 5V – 36V, at room temperature, continuous current 15A, power 400W! Enhance heat dissipation conditions, the maximum current up to 30A.
4: Quiescent Current: 20mA; Operating Current: 50mA
5: Life: any switching times; Working temperature: -40-85 ; Size: 6.0*3.4*1.2cm.
6: With optocoupler isolation, enhanced anti-jamming capability, industrial grade board.
Pay attention:

The module is an active output, the output voltage equal to the input voltage.
2.’DC + ‘and’ load + ‘This is an internal short circuit of the poles, but’ DC- ‘and’ load – ‘poles during use can not be shorted, otherwise the load can not be controlled on and off, which is equivalent load is been carrying electricity.
Timing range
0.1 seconds (min) to 999 minutes (max) continuously adjustable
How to choose the time range?

After setting the mode selection screen parameter value by a short press “STOP” button to select the time range;
XXX. decimal point in the unit place, time range: 1 second to 999 seconds.
X decimal point in decade place, Timing range: 0.1 seconds to 99.9 seconds
X. X. decimal full brightness, Timing range: 1 minute to 999 minutes.
For example, you want to set “OP” is 3.2 seconds, then move the decimal point to decade place, the digital display 03.2
Parameter description: “OP” – conduction time, “CL” – off time, “LOP” – the number of cycles (1-999 times, “—” represents infinite loop).
These parameters are independent of each other, but is shared by each mode. For example, in P1.1 mode, set the on-time “OP” is 5 seconds, if you switch to P1.2 mode, it’s “OP” will be 5 seconds too.
In the main interface (display 000), short press “SET” button will display “OP” ( “CL”, “LOP”) and the corresponding time XXX;
Some parameters only mode “OP” (such as the mode P1.1, P1.2, P1.3), short press the “SET” key to display only the “OP” and the corresponding time;
Some models have parameters “OP”, “CL”, “LOP” (such as the mode P3.1, P3.2), short press “SET” button will display “OP” and the corresponding time, “CL” and the corresponding time, “LOP” and the corresponding number of times;
In the main interface by short press “SET” key to see information about the parameters of the current mode, very convenient!
How to set parameters?

First, read the instructions to determine the required operating mode.
The module is powered up, the display at the current work mode (P1.1 default mode), then enter the main interface; press “SET” button for 2 seconds after release to enter mode selection interface; a short time by pressing “UP”, “DOWN” key to select the mode (P1.1 ~ P-4).
Select the mode (such as P3.2), short press the “SET” button, then the parameter to be set flashes ( “OP” on-time, “CL” off time, “LOP” cycles ( “—” represents infinite loop)), by “UP”, “DOWN” keys to adjust the parameter value, support long press (rapid increase or decrease) and short press (increase or decrease one unit); then short press the “STOP” key to select the decimal point position, select the time range (0.1 seconds to 999 minutes); short press the “sET” button to set the next parameters of the current mode of procedure is as above.
After the parameters are set, long press “SET” button for 2 seconds then release, the name of the current mode will flash once, and then return to the main screen, set the parameters of success!
The main interface: In the relay does not work status display “000” (no decimal point), with a decimal point under relay state.
Mode selection screen: Long press the “SET” key to enter, after setting is completed, long press the “SET” key to exit back to the main screen.
“STOP” button extensions:
Relays enable mode:
ON: Relay allows conduction in the “OP” on-time;
OFF: relay prohibit conduction is always closed;

In the main interface, short press the “STOP” button to switch between ON and OFF, the current in which the state will flash, and then return to the main screen. (This feature is an emergency stop function, click off the relay)
Sleep mode:
“C-P” Sleep mode: five minutes without any operation, the digital display automatically turns off, the program running as usual;
“O-d” normal mode: digital display always open;
Press the “STOP” button for two seconds and then release to switch “C-P” and “O-d” state, in which the current state of flashes and then return to the main screen

Package:
1 x   Trigger Cycle Timer Delay Switch 12V 24V Circuit Board MOS Tube Control Module

This MCP73871 solar power management module is designed for 5V to 6V solar panels. It can charge the 3.7V Li battery via solar panel. The scope of delivery also includes a large stabilizing capacitor that still has to be soldered onto the board. The module is an inexpensive option to supply your outdoor IOT projects with solar power.

Info: There is not much documentation about the board yet.

Characteristics:

• Status LED display: fully charged, charging, charging stopped
• Default charging current 500mA can be changed from 50mA to 1A (soldering resistors)
• Temperature monitoring possible by soldering on an external 10K NTC thermistor (bridge resistor must be removed on PCB first)

Connection:

• PWR => + Solar
• GND => – Solar
• GND => – load 
• load => + load
• Battery   => +Battery
• GND => – battery

Documentation:

• Using MCP73871
• Datasheet MCP73871

Technical details:

• Chip: MCP73871
• Dimension: 31.5 x 30.5 x 2.5mm
• Weight: 11g