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'-24V 2-Channel Relay interface board, and each one needs 50-60mA Driver Current. -Equipped with high-current relay, AC250V 10A ; DC30V 10A. -Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic). -Indication LED’s for Relay output status.
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A unipolar stepper motor has one winding with center tap per phase. Each section of windings is switched on for each direction of magnetic field. Since in this arrangement a magnetic pole can be reversed without switching the direction of current, the commutation circuit can be made very simple (e.g., a single transistor) for each winding. Typically, given a phase, the center tap of each winding is made common: giving three leads per phase and six leads for a typical two phase motor. Often, these two phase commons are internally joined, so the motor has only five leads.
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A unipolar stepper motor has one winding with center tap per phase. Each section of windings is switched on for each direction of magnetic field. Since in this arrangement a magnetic pole can be reversed without switching the direction of current, the commutation circuit can be made very simple (e.g., a single transistor) for each winding. Typically, given a phase, the center tap of each winding is made common: giving three leads per phase and six leads for a typical two phase motor. Often, these two phase commons are internally joined, so the motor has only five leads.
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The 28-BYJ48 comes with Breakout using ULN2003 As a Motor driver chip . Rated voltage : 5VDC Number of Phase 4 Speed Variation Ratio 1/64 Stride Angle 5.625° /64 Frequency 100Hz DC resistance 50Ω±7%(25℃) Idle In-traction Frequency > 600Hz Idle Out-traction Frequency > 1000Hz In-traction Torque >34.3mN.m(120Hz) Self-positioning Torque >34.3mN.m Friction torque 600-1200 gf.cm Pull in torque 300 gf.cm Insulation grade A
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Product Features: 1. Toshiba TB6560AHQ chip - maximum 3.5 Adrive current, more powerful. 2. 1 - 1/16 microstep setting - higher accuracy, smoother operation. 3. Overload & over-current & over-temperature protection, full protection of your computer and peripheral equipment. 4. 4 files current settings can be set according to the user the actual current requirement. 5. Full closed-type optical isolation to protect the user's computer and equipment. 6. Professional design, two-stage signal processing, super anti-jamming. 7. Bipolar constant current chopper drive motor low-speed non-creeping phenomenon, noise, non-resonant region. 8. Four input control, you can set limit, emergency stop, which is divided into pairs of knives.