RTC (Real Time Clock) DS1307 module (with battery)

RTC (Real Time Clock) DS1307 module (with battery)

Mega 2560 CH340G/ATmega2560-16AU, Micro-USB

Stepper motor Driver DRV8825 for 3D printers

Stepper motor Driver A4988 for 3D printers

Breadboard on plate with binding posts
As low as $1.89
Availability: In stock
SKU
Mod-StepDrv-A4988
A4988 is a complete microstepping motor driver with built-in translator for easy operation. This driver can use in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes.A4988 converter is the key to the easy implementation. As long as the "step" input inputting one pulse drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened. In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (Slow or Mixed). In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime. Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power sequencing.* Heatsink in SET.
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Specifications

Microcontroller ATmega2560
USB-TTL converter CH340G
Power Out
  • 3.3V-180mА
  • 5V-800mА
Power IN. USB 5V
Power IN. VIN/DC Jack 6-12V
Power Consumption 5V 220mA
Logic Level 5V
Clock Frequency 16MHz
Operating Supply Voltage 5V
Digital I/O 54
Analog I/O 16
Memory Size 256kb
Data RAM Type/Size 8Kb
Data ROM Type/Size 4Kb
Interface Type ISP
Operating temperature −40С°/+85С°
Length×Width 53.361×101.86mm

Documents

Dimensional drawing

Dimensions Stepper motor Driver A4988 for 3D printers with heating sink Dimensions Stepper motor Driver A4988 for 3D printers with heating sink

Pinout

Pinout Stepper motor Driver A4988 for 3D printers with heating sink Pinout Stepper motor Driver A4988 for 3D printers with heating sink

Schematic

Schematic of Stepper motor Driver A4988 for 3D printers with heating sink