As shown in the figure, the motor speed control circuit. This is a closed-loop control circuit that controls the speed of the fractional horsepower DC motor. It consists of a CD4046 phase-locked loop chip, a phototransistor and peripheral components. A grooved disk is mounted on the motor shaft, and the received pulse frequency fm is detected, and fm is compared with the reference frequency fref outputted by the voltage controlled oscillator in phase. When fm
1.ANTENK Card Edge Connectors are precision engineered PCB mount connectors developed to mate with the plated fingers of a printed circuit daughter board. Their bifurcated, cantilever contacts are set in a dual readout configuration and they offer a reliable connection for a wide range of PCB thicknesses. ANTENK`s sturdy solder tails with tapers allow easy insertion and rugged durability
Card Slot Connectors Specification:
*Electrical Characteristitics:
Number of connectors:750Pcs/REEL
MATERIAL&FINISH
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Current Rating;0.5A.
Withstanding Voltage:AC500V r.m.s.
Insulation Resistance:1000Megohms Minimum at DC 500V
Contact Resistance:100Miliohms Maximum.
*Mechanical Characteristics:
Mating Cyeles:5000 Insertions.
*Environmwntal:
Operating Temperture:-40°To+60°
*Material:
1.Housing:HI-Temp plastic UL 94V-0 Rated.
2.Contact:Copper Alloy.
3.Shell:SUS.
*Finish :
1u" Gold plated on conatct area,1u" Gold plated on
solder tails, Base Nickel :50u"Min
*Packing:
Insulator:PBT Glass Fiber(UL94V-0)
contact:Brass
Contact:Gold-Plated Over Nickel
SPECIFICATIONS
Current Rating:1A AC,DC
Voltage Rating:250V AC,DC
Temperature Range:-40℃ To+105℃
Contact Resistance:20mΩMin
Insulation Resistance:1000MΩ Min
Withstanding Voltage:500V AC/Min
Control motor speed design
2.Our products are widely used in electronic equipments,such as monitors ,electronic instruments,computer motherboards,program-controlled switchboards,LED,digital cameras,MP4 players,a variety of removable storage disks,cordless telephones,walkie-talkies,mobile phones,digital home appliances and electronic toys,high-speed train,aviation,communication station,Military and so on