GU Impex

It is a 4 Channel Isolated 5V 10A Relay Module, A wide range of microcontrollers such as Arduino, AVR, PIC, ARM and so on can control it. It is also able to control various appliances and other types of equipment with a large current.

Relay output maximum contact is AC250V 10A and DC30V 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.

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

Each relay can individually switch on/off by an opto-isolated digital input, which that can connect directly to a microcontroller output pin. 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 1.0V to 5V devices.

Note: The relay type model available for this product is JQC3F-5VDC-C, SRD-05VDC-SL-C, and FL-3FF-S-Z. You may get any one of them randomly. On the high level and low level-triggered mode, friends who do not understand, have a look:

• High-level trigger refers to the signal voltage between input and trigger, can be understood as a signal input with VCC cathode short-circuit triggered a way;
• Low-level trigger refers to the signal voltage between the input terminal and Earth OV trigger, can be understood as the signal input terminal and the GND negative electrode short circuit triggered away  1-channel relay module connection

Features :

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

The Digital Sensor TTP223B Module Capacitive Touch Switch is based on a touch-sensing IC (TTP223B) capacitive touch switch module. Allows you to remove the worry of conventional push-type keys.

Digital Capacitive Touch Switch Module is based on TTP223B. Normally, it outputs low and keeps at low power state. When a touch is sensed on the circular marked region, it outputs high and switches to the quick response state. When not being touched for 12 seconds, it switches to low power state again.

If the module is mounted in the surfaces of non-metallic materials such as plastic, glass, acrylic, you can make the keys hidden in the walls and desks.

In addition to the thin paper ( non-metallic ) covering the surface of the module, as long as the correct location of the touch, you can make hidden in the walls, desktops and other parts of buttons.

Touch Sensor Interface :

1. Control Interface: A total of three pins (GND, VCC, SIG), GND to the ground, VCC is the power supply, SIG digital signal output pin
2. Power Indicator: Green LED, power on the right that is shiny
3. Touch area: Similar to a fingerprint icon inside the area, you can touch the trigger finger.
4. Positioning holes: 4 M2 screws positioning hole diameter is 2.2mm, the positioning of the module is easy to install, to achieve inter-module combination.

Features :

1. Low power consumption
2. Power supply voltage(VCC): 2.0, 3, 5.5 V.
3. Output high VOH: 0.8VCC V
4. Output low VOL: 0.3VCC V
5. Response time (touch mode) : 60 mS
6. Response time (low power mode) : 220 mS
7. Can replace the traditional touch of a button
8. Four M2 screws positioning holes for easy installation

Touch Sensor Interface:-

• Control Interface: A total of three pins (GND, VCC, SIG), GND to ground, VCC is the power supply, SIG digital signal output pin
• Power Indicator: Green LED, power on the right that is shiny
• Touch area: Similar to a fingerprint icon inside the area, you can touch the trigger finger.
• Positioning holes: 4 M2 screws positioning hole diameter is 2.2mm, the positioning of the module is easy to install, to achieve inter-module combination.

(0.96 inch) 128x64 OLED Display Module - SPI/I2C - 7 Pin

2.44 cm (0.96 inch) Blue OLED display module. The display module can be interfaced with any microcontroller using SPI/IIC protocols. It is having a resolution of 128x64 . The package includes display board,display, 7 pin male header presoldered to board.

OLED (Organic Light-Emitting Diode) is a self light-emitting technology composed of a thin, multi-layered organic film placed between an anode and cathode. In contrast to LCD technology, OLED does not require a backlight. OLED possesses high application potential for virtually all types of displays and is regarded as the ultimate technology for the next generation of flat-panel displays.

OLEDs basic structure consists of organic materials positioned between the cathode and the anode, which is composed of electric conductive transparent Indium Tin Oxide (ITO). The organic materials compose a multi-layered thin film, which includes the Hole Transporting Layer (HTL), Emission Layer (EML) and the Electron Transporting Layer (ETL). By applying the appropriate electric voltage, holes and electrons are injected into the EML from the anode and the cathode, respectively. The holes and electrons combine inside the EML to form excitons, after which electro luminescence occurs. The transfer material, emission layer material and choice of electrode are the key factors that determine the quality of OLED components.

 

Setting up SPI/I2C Connection with GMS096A OLED Module:-

Being a new entry to the market, only limited resources are available on this small piece of miracle (GMS096A). I2C/SPI configuration always demands helpful resources as in any case. For the SPI setup, the module comes in 4 wire SPI configuration by default.

For the I2C setup it demands a little bit of work on the module. Actually it was one of our customers who shared these simple configuration steps with us, start with resoldering the resistor from position R3 to R1 and then short the R8 resistor with some solder tin (0 Ohm resistor). The R6 and R7 pullup resistors are already soldered, nothing to do there. Once done, the module is ready for I2C communication! The CS Pin is not necessarily needed, so just connect it to GND. The DC Pin selects the address. For standard address wire it to GND. The RES-pin needs a low pulse at startup and high voltage during operation (as in SPI mode), a 100nF capacitor to GND and a 10k res to VCC would be ideal!

 

Features:-

 

• OLED Driver IC: SSD1306
• Resolution: 128 x 64
• Visual Angle: >160°
• Input Voltage: 3.3V ~ 6V
• Compatible I/O Level: 3.3V, 5V
• Only Need 2 I/O Port to Control
• Full Compatible with Arduino
• Working temperature: -30°C ~ 70°C
• Module volume ( generous ): 2.7 cm x 2.7 cm x 0.41 cm
• Factory configured for SPI protocol (can be easily changed to IIC)

The W5100 Ethernet Module is a full-featured, single-chip. This Ethernet controller is designed for embedded applications; where ease of integration, stability, performance, area and system cost control are requires.

The W5100 Ethernet Module has been designed to facilitate easy implementation of Internet connectivity without OS. W5100 is IEEE 802.3 17 BASE-T and 802.3u 10 BASE-TX compliant.

The W5100 includes fully hardwired, market-proven TCP/IP stack and integrated Ethernet MAC & PHY. Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP and PPPoE which has been proven in various application for several years. A 16kbytes internal buffer is included for data transmission.

Features :

 

1. Support Hardwired TCP/IP Protocols: TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
2. 10BaseT/100BaseTX Ethernet PHY embedded
3. Auto-Negotiation (Full-duplex and half duplex)
4. Support Auto MDI/MDIX
5. Simultaneously Supports to 4 independent sockets
6. Not support to IP Fragmentation
7. Internal 16Kbytes Memory for Tx/Rx Buffers
8. 0.18 m CMOS technology
9. 3.3V operation with 5V I/O signal tolerance
10. Provide Serial Peripheral Interface (SPI MODE 0, 3) support
11. Support ADSL connection (with support PPPoE Protocol with PAP/CHAP Authentication mode).

RS485 to TTL Converter Module Serial Port UART Hardware Automatic Flow Control Module is based of MAX485 chip, which is one of the most relied on when working with RS485 Bus. This module supports 3.3 V and 5V power supplies, and TTL Levels. It can connect and identify up to 128 nodes on the RS485 bus. This module also supports very long range of the bus.

This RS485 to TTL Converter Module can support up to 800 meter of bus length. It has connections for RX,TX, +ve and GND, on one side, and other side has connection for RS485 bus. It also has the Indicators for the Receive and Transmit Signals. And, the thickness of PCB is 0.8 mm, which enables it to be used as add-on on any of your PCBs or devices.

 

Features and Specifications:-

 

• The module is fully considered mine design, long-distance transmission signal 485 in the wild, the module “Connected to the ground” terminal is connected to the earth, can play a very good anti-jamming and anti- effect, more secure; it can not connect with the ground when the indoor short-distance transmission.
• Using the standard 2.54 pitch design, easy secondary development.
• Has a 120 ohm termination resistors, shorted R0to enable the termination resistor.
• Support multi-machine communication, allowing access at up to 128 devices on the bus
• The module can be hot swapped, the signal does not appear dead phenomenon.
• A large area of copper to prevent interference.
• Compatible with 3.3V and 5.0V power supply.
• Compatible with 3.3V and 5.0V signal.
• Absolute using imported chips, industrial design, anti-interference ability, while using more effective mine design can be used in the industrial field and harsh field environments, the working temperature of -40 ° to + 85 ° transmission distance up to 1 kilometer (made with 850 meters of cable F1.5 tests recommended in the 800 meters, more than 800 m, please add repeaters).
• Semi-hole pads, onboard module, thin PCB, having a thickness of 0.8mm.
• Has RXD, TXD signal indicator light, monitor send and receive status.

 

 

Note:

 

• Only one in the whole network, 3.3V and 5.0V power supply, RS485 signal perfectly compatible with automatic flow control module.
• Without “Receiving – launch” control, this module is as simple to use with your serial port operations.

 

The TEC1-12703 30x30mm Thermoelectric Cooler 3A Peltier Module is the simple application of Peltier Thermoelectric Effect. The module features 127 semiconductor couples in the area of 30mmx30mm.

Thermoelectric coolers also are known as TEC or Peltier Module create a temperature differential on each side. One side gets hot and the other side gets cool. Therefore, they can be used to either warm something up or cool something down, depending on which side you use. You can also take advantage of a temperature differential to generate electricity.

This Peltier works very well as long as you remove the heat from the hot side. After turning on the device, the hot side will heat quickly, the cold side will cool quickly. If you do not remove the heat from the hot side (with a heat sink or other device), the Peltier will quickly reach stasis and do nothing. We recommend using an old computer CPU heatsink or another block of metal to pull heat from the hot side. We were able to use a computer power supply and CPU heatsink to make the cold side so uncomfortable we could not hold our finger to it.

A thermoelectric cooling (TEC) module is a semiconductor-based electronic component that functions as a small heat pump. By applying the DC power source to a TEC, heat will be transferred from one side of the module to the other. It creates a cold and hot side. They are widely used in industrial areas, for example, computer CPU, CCDs, portable refrigerators, medical instruments, and so on.

Also Known as Thermoelectric cooling modules, Thermoelectric modules, Peltier modules, Thermoelectric cooling module.

Operating Tips:

1. Do not exceed Imax or Vmax when operating a module.
2. Please carry out moisture protection options (sealing) in final application use.
3. Life expectancy: 200,000 hours.
4. Failure rate based on longtime testings: 0.2%.

Important Note!! Heat side requires heat sink all the time. “ Do not run this device with a power supply more than a few seconds without a heatsink mounted to the device! ”

Features :

1. Small module.
2. Easy transition between the hot side to the cool side and vice-versa just by reversing the polarity of the supply.
3. Quality tested cooling cells.
4. Solid-state, vibration-free, noise-free.
5. Simple to install and operate.
6. Should use with a heat sink.

This RS232 to TTL Serial Interface Module is a board with the MAX3232 transceiver integrated circuit (IC). It facilitates serial communication between TTL and RS232 ports by providing the necessary electrical signal conversion.

These boards usually have a DB9 connector soldered at one end, and four header pins for jumper cables at the other end. The jumper cables enable the user to connect the wires to a breadboard or a microcontroller project board, whilst the DB9 connects directly to a COM port of a computer.

The MAX3232 IC, which comes in a 16 pin narrow SO package. It requires between 3.0 V to 5.5 V to operate and has two receivers and two transmitters. It has a maximum guaranteed data rate of 120 kbps, and the circuitry requires four 0.1µF charge-pump support capacitors. It is also compatible with the famous MAX3232 IC pins. These boards connect to systems with a UART  hence, they work with ATMEL and PIC microcontrollers.

MAX3232 RS232 Serial Port To TTL Converter Module DB9 Connector 5V RS232 to TTL + Female Serial TTL + serial modules / Brush board. This module can be used to the serial port of the microcontroller module expand DVD, router, hard drive, and other equipment to upgrade.

Features :

1. It is widely used in radio modification, phone flash, XBOX360 flash, GPS, vehicle detection, DVD flash, hard disk repair set-top box upgrade.
2.  It can be used to program STC MCU, NXP MCU, Renesas MCU, STM32 MCU, N+-2EC MCU
3. Pre-assembled compact size board
4. Suitable for use with most microcontrollers
5. Operates up to 250 kbit/s

To setup Wireless Serial Communication, HC-05 Bluetooth Module is most demanding and popular due to its low price and extremely high features.This module can be used in Master or Slave Mode and easy switchable between these two modes, By default Slave mode is configured.Modes can be changed using AT Commands.The slave mode in HC-05 cannot initiate a connection to another Bluetooth device, but can accept connections.Master mode can initiate a connection to other devices.
HC-05 Specifications:- 

• 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

HC-05 Applications:-

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

This is a 16 Channel 5V Relay Module with Optocoupler, Be able to control various appliances and other equipment with a large current. It can be controlled directly by Micro-controller (Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, TTL logic).
This is 5V 16-Channel Relay interface board and each one of the individual relays needs 15-20mA Driver Current. The board features indication LED for Relay output status and the standard interface that can be controlled directly by many of widely used microcontrollers like Arduino etc.
The 5V electromechanical relay module with AC contact capacity of 250V which also include light coupling protection(optocoupler) for isolation of control circuitry. The plate load power module doesn’t need an external power supply. It supports all SCM Drive.

Features of 16 Channel 5V Relay Module with Optocoupler :-

• 5V relay with AC contact capacity of 10A 250V and optocoupler protection.
• Onboard power supply module does not need an external power supply. I / O port driver is active low.
• The module can be used as a microcontroller development board module and also as appliance control, PLC extended output.
• It is using the industry’s top -quality isolation optocouplers, strong anti-jamming ability, stable performance.
• The 1-16 road can be any full on/off or any road.
• Each relay common terminal “COM” are independent, user-friendly access to different signals, each relay are normally closed and normally open with the port.
• Each relay is equipped with motion lights.
• All interfaces can be directly connected through the terminal leads, very convenient.

Specifications of 16 Channel 5V Relay Module with Optocoupler :-

• Working voltage: 5 Volts
• Maximum Current: 500 mA
• Low State Voltage: 0 - 0.5 volts (Relay is ON)
• High State Voltage: 3.7 to 5 volts  (Relay is OFF)
• Number of Channel: 16
• Dimension: 180 x 90 x 20mm (L x W x H)
• Weight: 100 g

Instructions for 16 Channel 5V Relay Module with Optocoupler:-

• The power supply should meet the scope of use, DC 5V.
• The power supply cannot be reversed.
• The load power should have a certain margin for the relay load. Avoid high power (about 2000W) and work for a long time, which will have a certain impact on product life.

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.

The DRV8825 Stepper Motor Driver with Aluminum Heat Sink is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver.

The module has a pinout and interface that are nearly identical to those of the A4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications.

The DRV8825 features adjustable current limiting, overcurrent, and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).

Features :

1. Microstep resolutions: full, 1/2, 1/4, 1/8, 1/16, and 1/32.
2. Simple step and direction control interface
3. Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
4. Adjustable current control lets you set the maximum current output with a potentiometer. Hence lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
5. Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
6. 45 V maximum supply voltage
7. Built-in regulator (no external logic voltage supply needed)
8. Can interface directly with 3.3 V and 5 V systems
9. Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
10. Short-to-ground and shorted-load protection
11. 4-layer, 2 oz copper PCB for improved heat dissipation
12. Exposed solderable ground pad below the driver IC on the bottom of the PCB
13. Supply Voltage: 8.2 – 42 VDC.
14. Current Capacity : 2.2A max(24V).
15. Continuous current per phase: 1.5 A.
16. Minimum Logic voltage: 2.5V.
17. Maximum Logic Voltage: 5V.
18. Microstep resolutions: full, 1/2, 1/4, 1/8, 1/16, and 1/32.
19. Dimensions : 15 x 20 mm.
20. Weight: 4 gm.

This is 1 Channel 5V Relay Board Module For Arduino PIC AVR DSP ARM. A wide range of microcontrollers such as Arduino, AVR, PIC, ARM and so on can control it.

Each one needs 15mA - 20mA driver current and Equipped with high current relay: DC 5V / 10A, AC 250V / 10A

Standard interface that can be compatible with microcontroller.

This 1-channel 5V control Single-Pole Double-Throw (SPDT) High-level trigger AC power relay board can be controlled directly via a microcontroller and switch up to 10A at 250 VAC. The inputs of 1 Channel 5V Relay Module are isolated to protect any delicate control circuitry.

The default state of the relay when the power is off for COM (Power) to be connected to NC (Normally Closed). This is the equivalent of setting the relay board IN pin to HIGH (has +5V sent to it).

A wide range of microcontrollers such as Arduino, AVR, PIC, ARM, etc can be used to control this 5V relay module

NOTE : There Is Printing Mistake On  Module 250VAC To 30VAC And 125VAC to 28VAC But Working Will Be Same.

Pin Configuration:

 

Connection Diagram:

 

Features :

1. 1 channel relay module.
2. One normally closed contact and one normally open contact.
3. High impedance controller pin.
4. Default High-level trigger.
5. Pull-down circuit for the avoidance of malfunction.
6. Power supply indicator lamp.
7. Can be controlled various appliances & other Equipment With Large current.
8. Standard TTL Level logic controlled.
9. The module is compliant with international safety standards.
10. With 4 fixed screw holes, hole diameter 3.1mm, convenient installation, and fixation.

This 7 segment LED Display  has 4 digits which are controlled by TM1637 Driver Chip. It requires only two connections to control this TM1637 4 Bits Digital Tube LED Display Module. Also thanks to the I2C Bus you can control it using only 2 wires, leaving more pins available on your MicroController to connect other things.

The module is a 12-foot clock with four common anode tube (0.36 inch) display module for driver IC TM1637, only two signal lines can make the MCU control four 7-segment digital tubes.

There are several modules using this TM1637 chip to form a 4 digit numerical display module.

A useful as well as single module to produce dog barking musical sound that can be easily interfaced with speakers and a simple power supply without the need of additional amplifier units. The module has a non-removable chip and easy to connect PCB leads for trouble free soldering solutions.

It can be powered using simple 3-4.5V DC which is suitable for usage of 2 pcs 1.5V batteries if used as indoor bell systems. The output specification requires 0.25W to 2W speakers with 8 Ohms impedance. Inbuilt button or trigger offers one time play if shorted.

 

Pinouts

Dog Barking Music Chip Features & specifications:

• Good Quality Output
• 3.0-4.5V Operation voltage
• No additional amplifier requires
• Small size PCB to be fitted in very small space during DIY
• 0.25W-2W speaker support with 8 Ohms impedance
• Solder-able pads available in the module

 

Dog Barking Music Chip Applications:

• Calling bell
• Toys
• Various alerting devices

Dimension

 

2.44 cm (0.96 inch)  OLED Display Module is a precise small, White OLED module which can be interfaced with any microcontroller using SPI protocol. It is having a resolution of 128x64. The package includes display board, display, 6 pin male header.

OLED (Organic Light-Emitting Diode) is a self light-emitting technology composed of a thin, multi-layered organic film placed between an anode and cathode. In contrast to LCD technology, OLED does not require a backlight. OLED possesses high application potential for virtually all types of displays and is regarded as the ultimate technology for the next generation of flat-panel displays.

OLEDs basic structure consists of organic materials positioned between the cathode and the anode, which is composed of electric conductive transparent Indium Tin Oxide (ITO). The organic materials compose a multi-layered thin film, which includes the Hole Transporting Layer (HTL), Emission Layer (EML) and the Electron Transporting Layer (ETL). By applying the appropriate electric voltage, holes and electrons are injected into the EML from the anode and the cathode, respectively. The holes and electrons combine inside the EML to form excitons, after which electro luminescence occurs. The transfer material, emission layer material and choice of electrode are the key factors that determine the quality of OLED components.

It can be used with either an spi  interface - selectable by soldering two jumpers on the again. The design is completely 5v-geared up, with an onboard regulator and constructed in raise converter. It's easier than ever to connect immediately for your 3v or 5v microcontroller without having any type of stage shifter.

Additional Information:

• Delivery Time: STANDARD

This is a RoHS compliant I2C Serial LCD Daughter board that can be connected to a standard 16×2 or 20×4 Character Display Module that supports 4-bit mode. All Character Modules sold on our site support 4-bit mode, and nearly all commercially available 16×2 and 20×4 line character modules support it too.

This board has a PCF8574 I2C chip that converts I2C serial data to parallel data for the LCD display. There are many examples on the internet for using this board with Arduino. Do a search for “Arduino LCD PCF8574“. The I2C address is 0x3F by default, but this can be changed via 3 solder jumpers provided on the board. This allows up to 3 LCD displays to be controlled via a single I2C bus (giving each one it’s own address)

The A4988 driver Stepper Motor Driver is a complete micro-stepping motor driver with built-in converter, easy to operate. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling).

A4988 driver Stepper Motor Driver includes a fixed off-time current regulator, the regulator can be in slow or mixed decay mode. The converter is the key to the easy implementation of the A4988.

There are no phase sequence tables, the high-frequency control interface programming etc. The application of A4988 interface is very suitable for a complex microprocessor is not available or overload. In the stepping operation, the chopping control in the A4988 automatically selects the current decay mode (slow or mixed). The mix decay current control scheme can reduce the audible motor noise, increased step accuracy, and reduced power consumption.

Provide internal synchronous rectification control circuitry, in order to improve the pulse width modulation (PWM) power consumption during operation.

Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO) and crossover current protection. Don’t need special power-up sequencing. A4988 uses surface mount QFN package (ES), the size is 5 mm × 5 mm, nominal overall package height is 0.90 mm, with an exposed thermal pad to enhance the heat dissipation function.

Note: The difference between product “A4988 driver Stepper Motor Driver- Normal Quality” and “A4988 driver Stepper Motor Driver- Good Quality”  is, The good quality A4988 has more number of PCB layers and it features the connecting pins which are of gold plated as compared to other.

Note : HR4988 on product working remains same.

Features :

1. Automatic current decay mode detection/choice.
2. Mixed with slow current decay mode.
3. The low power dissipation of synchronous rectifier.
4. Internal UVLO(ultra voltage lockout).
5. Crossover current protection.
6. Thermal shutdown circuit.
7. Ground fault protection.
8. Loading and short circuit protection.
9. The optional five-step mode: full, 1/2, 1/4, 1/8 and 1/16.

Package Includes :

1 x A4988 Stepper Motor Driver- Normal quality.

1 x Heat sink.