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TTL to RS485 Module (supporting EIA-485 standard) is for long range, high data rate error prone differential communication. Digital communications networks implementing the EIA-485 standard can be used effectively over long distances and in electrically noisy environments. Multiple receivers may be connected to such a network in a linear, multi-drop configuration. These characteristics make such networks useful in industrial environments and similar applications.

Going from TTL to RS485 is made simple by this prototyping friendly module. On one side of the board are the TTL IOs, and on the other are the RS485. At the core is a MAX485 which is powered by 5V.

Specifications

  • Features MAX485 chipset
  • Working Voltage: 5V
  • Allows up to 32 transceivers on the bus
  • Data Rate : 2.5Mbps
  • Current-limiting and thermal shutdown for driver overload protection
  • 5.08mm (0.2″) pitch, 2-pin terminals for RS-485 easy communication and wiring
  • 4-pin 2.54mm (0.1″) pitch headers for RS485 and power
  • 4-pin 2.54mm (0.1″) pitch headers for DI,DE,RE,RD signals
  • PCB Board Size: 44 x 14mm
  • Fully assembled, ready for use

Applications

  • Multi-drop wired communication System, requiring multiple nodes needing to talk to each other.
  • Long distance error prone wired communication
  • High data rate wired communication

MAX485 IC.
This IC will take RS232 signals and perform the voltage level conversions required to turn them into 485 signals.

Pin-out:

  1. RO – Receiver out
  2. RE – Receiver enable (enabled when this pin is LOW)
  3. DE – Driver enable (enabled when this pin is HIGH)
  4. DI – Driver in (the transmitter pin)
  5. GND – Ground (0V)
  6. A – Connect to pin A of the other 485 IC
  7. B – Connect to pin B of the other 485 IC
  8. Vcc – Power, in my case +5V

Technical Reference 

MAX485 Data Sheet : https://datasheets.maximintegrated.com/en/ds/MAX1487-MAX491.pdf

RM3.20

1602 16x2 Blue Backlight White Character LCD Display is a basic 16 character by 2 lines Alphanumeric display. This LCD 16x2 Character LCD Display has White text on a blue background. Utilizes the extremely common HD44780 parallel interface chipset. Interface code is freely available. A minimum of 6 general I/O pins to interface to this LCD screen. Includes LED backlight. Works in 4-bit and 8-bit Mode. It can be used for Arduino, Raspberry Pi and any Microcontrollers.

FEATURES

  1. 16 Characters x 2 Lines
  2. Blue Backlight
  3. 5x7 Dot Matrix Character + Cursor
  4. HD44780 Equivalent LCD Controller/Driver Built-In
  5. 4-bit or 8-bit MPU Interface
  6. Standard Type
  7. Works with almost any Microcontroller

SPECIFICATIONS

Construction

COB (Chip-on-Board)

Display Format

16x2 Characters

Display Type

STN, Transflective, Positive

Controller

SPLC780D1 or equivalent controller

Interface

8-bit Parallel Interface

LCD Color

White Text on Blue Backlight

Backlight

LED

Driving Scheme

1/16 Duty Cycle, 1/5 Bias

Power Supply Voltage

5.0 V

VLCD Adjustable For Best Contrast

5.0 V (Vop.)

Operating Temperature

-20⁰C ~ 70⁰C

Storage Temperature

-30⁰C ~ 80⁰C

 

TECHNICAL REFERENCE 

Tutorial : https://www.instructables.com/id/How-to-use-an-LCD-displays-Arduino-Tutorial/

RM5.70

SPECIFICATION

1. Red, Green, Blue (RGB), and White Light Sensing with IR Blocking Filter

2. Programmable Analog Gain and Integration Time

3. 3,800,000:1 Dynamic Range

4. Very High Sensitivity ? Ideally Suited for Operation Behind Dark Glass

5. Maskable Interrupt

6. Programmable Upper and Lower Thresholds with Persistence Filter

7. Power Management

8. Low Power ? 2.5-uA Sleep State

9. 65-uA Wait State with Programmable Wait State Time from 2.4 ms to > 7 Seconds

10. I2C Fast Mode Compatible Interface

11. Data Rates up to 400 kbit/s

12. Input Voltage Levels Compatible with VDD or 1.8 V Bus

13. Register Set and Pin Compatible with the TCS3x71 Series

14. Small 2 mm*2.4 mm Dual Flat No-Lead (FN)

APPLICATIONS

1. RGB LED Backlight Control

2. Light Color Temperature Measurement

3. Ambient Light Sensing for Display Backlight Control

4. Fluid and Gas Analysis

5. Product Color Verification and Sorting

TECHNICAL REFERENCE

Tutorial : http://www.electronicprojects.net/articles/a-look-at-the-tcs34725-color-sensor-with-various-examples.php

RM11.80

This is the popular L298N Dual H-Bridge Motor Controller, typically used to control motor speed and rotation direction. It can also be used for other products such as with LED arrays, relays, and solenoids, etc.  It's a powerful little motor driver with a heavy duty heat sink. Capable of powering 5-35V motors with a max of 2A. It is suitable to be used with Arduino Uno, Nano, Mega and Raspberry Pi.

We've used up to 4 motors using the 6 onboard screw-terminals.  It has an onboard 5V regulator that can output up to 1A with components with 5V power requirement. Don't use the 5V regulated power when supplying more than 12V to motors.

Specification: 

  • Double H-bridge drive
  • Chip: L298N (ST NEW)
  • Logic voltage: 5V
  • Drive voltage: 5V-35V
  • Logic current: 0mA-36mA
  • Drive current: 2A (MAX single bridge)
  • Storage temperature: -20 to +135 degree celcius
  • Motors: DC motor and stepper motor
  • Max power: 25W
  • Weight: 30g
  • Size: 43*43*27mm (approx 1.75" x 1.75" x 1")
  • Compatible with L297/L298 driver

Technical References

L298 Data sheet : https://www.smart-prototyping.com/image/data/9_Modules/101861%20LN298N%20dual%20H-bridge%20driver%20motor/L298DATASHEET.pdf

Tutorial 1 : https://www.instructables.com/id/L298N-MOTOR-DRIVER-MODULE/

Tutorial 2 : https://www.instructables.com/id/Arduino-Modules-L298N-Dual-H-Bridge-Motor-Controll/

Tutotial 3 : https://www.instructables.com/id/L298n-Arduino-Library/

Tutorial 4 : https://www.instructables.com/id/Control-DC-and-stepper-motors-with-L298N-Dual-Moto/

RM5.30

Sing for the moment! The MP3-TF-16P is a small and low cost MP3 module player with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in combination with an Arduino or any other with RX/TX capabilities. 

The MP3-TF-16P perfectly integrates hard decoding module, which supports common audio formats such as MP3, WAV and WMA. Besides, it also supports TF card with FAT16, FAT32 file system. Through a simple serial port, you can play the designated music without any other tedious underlying operations.

SPECIFICATIONS

  • Supported sampling rates (kHz): 8/11.025/12/16/22.05/24/32/44.1/48
  • 24 -bit DAC output, support for dynamic range 90dB , SNR support 85dB
  • Fully supports FAT16 , FAT32 file system, maximum support 32G of the TF card, support 32G of U disk, 64M bytes NORFLASH
  • A variety of control modes, I/O control mode, serial mode, AD button control mode
  • Advertising sound waiting function, the music can be suspended. when advertising is over in the music continue to play
  • Audio data sorted by folder, supports up to 100 folders, every folder can hold up to 255 songs
  • 30 level adjustable volume, 6 -level EQ adjustable

APPLICATIONS

  • Car navigation voice broadcast;
  • Road transport inspectors, toll stations voice prompts;
  • Railway station, bus safety inspection voice prompts;
  • Electricity, communications, financial business hall voice prompts;
  • Vehicle into and out of the channel verify that the voice prompts;
  • The public security border control channel voice prompts;
  • Multi-channel voice alarm or equipment operating guide voice;
  • The electric tourist car safe driving voice notices;
  • Electromechanical equipment failure alarm;
  • Fire alarm voice prompts;
  • The automatic broadcast equipment, regular broadcast.

TECHNICAL LITERATURE

Tutorial 1 : https://www.instructables.com/id/Tutorial-of-MP3-TF-16P/

Tutorial 2 : http://acoptex.com/project/288/basics-project-065a-mp3-tf-16p-mini-mp3-player-module-at-acoptexcom/#sthash.8z3HzjgC.TKkeU2jp.dpbs

Tutorial 3 : https://www.factoryforward.com/mp3-tf-16p-arduino-dfplayer/

RM7.50

The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328P (Arduino Nano 3.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one.

SPECIFICATIONS

  • Microcontroller ATmega328
  • Operating Voltage (logic level): 5V
  • Input Voltage (recommended): 7V ~ 12V
  • Input Voltage (limits): 6V ~ 20 V
  • Digital I/O Pins: 14 (of which 6 provide PWM output)
  • Analog Input Pins: 8
  • DC Current per I/O Pin: 40mA
  • Flash Memory: 32KB (ATmega328) (of which 2 KB used by bootloader)
  • SRAM: 2KB (ATmega328)
  • EEPROM: 1KB (ATmega328)
  • Clock Speed: 16MHz
  • Length: 45 mm
  • Width: 18 mm
  • Weigth: 5 g

TECHNICAL REFERENCE

Arduino Nano Technical Information : https://www.arduino.cc/en/Main/ArduinoBoardNano

Arduino Nano Schematic Diagram : https://content.arduino.cc/assets/NanoV3.3_sch.pdf

Arduino Getting Started : https://www.arduino.cc/en/Guide/HomePage

Arduino IDE : https://www.arduino.cc/en/Main/Software

Arduino as ISP and Arduino Bootloaders : https://www.arduino.cc/en/tutorial/arduinoISP

CH340G Converter Windows 7 Driver : http://www.arduined.eu/ch340g-converter-windows-7-driver-download/

PACKAGE CONTENT : 1 x Arduino Nano V3.0 ATMEGA328P Compatible Improved Version , 1 x USB Cable

 

RM11.50

Lithium-Ion charge / discharge protection circuit comes with over-charge, over-discharge, over-current and short circuit protection, for a variety of various shapes 3.7V lithium Ion batteries. HX-3S-01 is small size, suitable for many requirements of high integration, low cost of the occasion, to meet a wide range of performance requirements to ensure that the battery pack is absolutely safe and reliable.

Features: 

  • Three series of lithium battery protection board.
  • Automatically cancel protection after protection conditions restore.
  • With function of overcharge protection, over discharge protection, short circuit protection, over-current protection.
  • Suitable for lithium battery pack of 11.1V, 12V, 12.6V.
  • Quiescent current < 30uA, so power consumption is small.

Specifications:

  • Model: HX-3S-01
  • Dimensions: 50 x 16 x 1mm
  • Over voltage range: 4.25-4.35V±0.05V
  • Over discharge voltage range: 2.3-3.0V±0.05V
  • Maximum operating current: 6-8A
  • Maximum transient current: #1: 9-10A,  #2:10-13A
  • Quiescent current: < 30uA
  • Internal resistance: < 100mΩ
  • Charging voltage: 12.6V – 13V
  • Working temperature: -40~+50℃
  • Storage condition: -40~ +80℃
  • Effective life: >30000h
  • Short circuit protection: Yes, delayed self recovery

Notes:

  1. Higher than 3A current discharge product, the discharge rate of battery discharge is above 3C.
  2. Multiplier calculation formula: 1C battery, 2000 capacity is equal to 2AH * 1 = 2A maximum working current.
  3. 3C ratio battery, 2000 capacity is equal to 2AH * 3 = 6A maximum working current.
  4. In the process of use, if the battery heat, the battery power is not applicable. This situation cannot be used for a long time.Otherwise, the battery will soon be damaged.
RM7.80

OWON XSA1000TG SERIES 9KHZ-1.5GHZ, 9KHZ-3.2GHZ, 9KHZ-3.6GHZ PORTABLE SPECTRUM ANALYZER WITH TRACKING GENERATOR

Features

- Frequency Range from 9 kHz up to 3.6 GHz
- -160dBm Displayed Average Noise Level
- Phase Noise -82dBc/Hz @1Gz and offset at 10KHz
- Total Amplitude Accuracy <1.5dB
- 10Hz Minimum Resolution Bandwidth (RBW)
- EMI Pre-compliance Test Kit
- 3.6 GHz Tracking Generator Kit
- 10.4 inches display

1 year local supplier and international manufacturer warranty against manufacturing defects.

RM4,850.00

PORTABLE DETACHABLE METAL BASE SOLDERING SOLDER IRON HOLDER STAND WITH SPONGE, ECONOMICAL

Feature

  • Universal stand and can be used with most soldering irons with different lengths of handles
  • Low cost soldering iron stand
  • Detachable
  • Easy to use, easy to clean, easy to disassemble
  • Iron stand is very stable and strong, with ultra-long life
  • Sponge included

Specifications

  • Color: Black+Silver
  • Base Size : 130mm x 65mm x 13mm
  • Sinking Spring Type Funnel Length : 90mm
  • Material : Full Metal
  • Weight : 80g

Package Include : 1 x Base, 1 x Sinking Spring Type Funnel, 1 x Set Installation Screws, 1 x Sponge

RM3.50

Features

  • A useful aid for soldering work or model makers
  • Adjustable crocodile holding clamps
  • Bottom battery compartment
  • Good stability
  • Complete with magnifying glass
  • Ideal when a third hand is needed
  • With two LED lighting, this model can work very well in the dark environment
  • With three pcs of AAA batteries (included), this model can continuously operate more than 10 hours

Specification

  • Lens diameter : 65mm (3.5x) and 17mm (12x)
  • Color: Black + Silver
  • Soldering iron holder size : 30 x 90mm (D x H)
  • Base size : 100 x 65 x 20mm (L x W x H)
  • Package size : 148 x 163 x 103mm (L x W x H)
  • Weight : 406g

Package Content : 1x LED Magnifier Helping Hand with Soldering Iron Stand, 3 x AAA Battery, Instruction Manual

RM20.80

Arduino Nano V3.0 I/O Expansion Board / Prototype Shield is specifically designed to facilitate an easy access of the interface pins of an Arduino Nano. Essentially, it expands the Arduino Nano Microcontroller to interface with external devices in a simple and trouble free manner. Each DIO pin or analogue pin of the Nano is brought out to a convenient header. If you add header pins, this board can also be used as expansion shield for UNO and Mega. It is a perfect companion of Nano breadboard and compatible with both Arduino Nano V2.x and V3.x.

Features

  • Multi-functional for various applications
  • Compact size
  • Reliable quality for long time use
  • On-board voltage regulator 3.3 V / 1 A

This expansion board / prototype shield provides:

  • 14 digital input/output pins
  • 6 PWM outputs pins
  • 8 analog inputs pins
  • I2C Interface pins
  • Power jack
  • Reset button
  • LED for power indicator
  • AMS1117 3.3V Output Voltage
  • Also compatible with Arduino UNO after soldering pin headers to this shield
  • Size:6 x 5.3 x 1.3cm (approx)
RM5.90

936 SOLDERING STATION SOLDERING IRON REPLACEMENT TIP 900M-T-1.2D HAKKO AOYUE SAIKE ATTEN KADA YIHUA

Replacement soldering iron tip for Hakko, Aoyue, Saike, Atten, Kada, Yihua 936 soldering station. It also compatible with Hakko FX-888, 936ESD, 937, 928, 900M, 900M-ESD, 907, 907ESD.

  • This type has a shape like a flat-blade screwdriver and is capable of soldering by applying the tip in 2 ways: line and face.
  • The width (size of tip) suitable for the workpiece can be selected, and it can be used for any soldering work.
RM3.30

Brand : ZOYI / ZOTEK

Model : ZT102A

Features

  • Smart / Intelligent, Multifunction. AC/DC voltage measurement, AC/DC current measurement, resistance measurement, capacitance measurement, frequency measurement, duty cycle, diode testing, continuity testing, NCV and temperature.
  • Portable design. Small, handheld and compact with protective holster to protect the multimeter.
  • Wide range of applications. It's a perfect tool for the laboratory, factory, hobbyist and home usage.
  • Easy to use and operate, one button operation.
  • Clear and easy to read. With large backlight LCD display, data hold, comfortable and easy to read the measurements even in dim and dark environment.
  • More advantages such as auto-ranging, true RMS, auto power off, analog bargraph, low battery indication and over-ranging indication.

This ZT102A is a handheld digital multimeter, high reliability and portable which is a perfect tool for the laboratory, factory, hobbyist and home usage. It can be used to measure AC/DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, diode, continuity, NCV and temperature. Moreover, more advantages such as LCD backlight, data hold, auto-ranging, true RMS, auto power off, low battery indication and over range indication.

Specifications

  • Model : ZT102A
  • Display : 6000 Counts
  • Backlight : Yes
  • Data Hold : Yes
  • Auto-Ranging : Yes
  • True RMS : Yes
  • Auto Power Off : Yes
  • Low Battery Alert : Yes
  • Smart Mode : Yes
  • Over-Ranging Indication : Yes
  • Diode Test : Yes
  • Continuity Test : Yes
  • NCV Test : Yes
  • DC Voltage : 60mV / 600mV / 6V / 60V / 600V / 1000V ±(0.5%+3), 
  • AC Voltage : 60mV / 600mV / 6V / 60V / 600V / 750V ±(1.0%+3),
  • DC Current : 60mA / 600mA / 6A / 10A ±(1.2%+3), 
  • AC Current : 60mA / 600mA / 6A / 10A ±(1.5%+3), 
  • Resistance : 600Ω / 6kΩ / 60kΩ / 600kΩ / 6MΩ ±(0.5%+3); 60MΩ ±(1.5%+3)
  • Capacitance : 9.999nF ±(5.0%+20), 99.99nF / 999.9nF / 9.999μF / 99.99μF / 999.9μF ±(2.0%+5), 9.999mF / 99.99mF ±(5.0%+5)
  • Frequency : 99.99Hz / 999.9Hz / 9.999kHz / 99.99kHz / 999.9kHz / 9.999MHz ±(0.1% + 2)
  • Duty Cycle : 1%~99% ±( 0.1%+2)
  • Temperature : -20℃~1000℃ (-4℉~1832℉) ±(2.5%+5)
  • Power Supply : 2 x 1.5V AA battery (included)
  • Size :130 x 65 x 32mm
  • Weight : 114g
  • Warranty : 1 year local supplier and international manufacturer warranty against manufacturing defects
RM58.00

Diameter : 50mm

Height : 16~17mm

Rated Power: 0.5W Rated

Impedance: 8Ω

Frequency Response: 4kHz

Directivity: Omnidirectional

Signal-to-Noise ratio: 94 ± 3dB

Usage: Electronics/microcontrollers DIY projects, radio, toys

RM1.30

FR1 14.5 x 6.5cm STRIPBOARD VEROBOARD PROTOTYPE PCB BOARD

Excellent choice for hobbyist for development and prototyping work. Stripboard / Veroboard is designed primarily for hard wiring of ICs and discrete components. Stripboard / Veroboard is manufactured from copper clad laminated board which has been pierced with a grid of holes and machined to provide parallel tracks.

Specification

  • Type : Single Sided
  • Board size : 145 x 65mm (14.5 x 6.5cm)
  • Column no. : 24
  • Holes no.per column : 55
  • Base Material : FR1 / Bakelite 
  • Thickness : Approx. 1.5mm 
  • Hole Pitch : Approx. 2.54mm 
  • Hole Diameter : Approx. 1.0mm 
RM1.65