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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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'-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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200grm Straight Bar Mini Load Cell RSN-157 Weight Capacity Max - 200 g Maximum Overload - 220 g Cell Repeatability Error Max - ± 50 mg Cell Non-Linearity Max - 50 mg Cell Hysteresis Max - 50 mg Electrical Properties Rated Output - 600 μV/V Rated Output Error Max ± 150 μV/V Output Impedance 1 kΩ Creep 100 mg/hr Temperature Effect on Zero 5 mg/°C Temperature Effect on Span 5 mg/°C Supply Voltage Min 3 V DC Supply Voltage Max 10 V DC Zero Balance Ratio ± 100 μV/V Material - Aluminium Alloy (LY12CZ) Screw Thread Size - 2.5M 47mm x 12mm x 6mm, 110mm Wire