BRIGHTNESS CONTROL



Embed the new parts as per the Wiring Checklist underneath. Press the switch and the LED illuminates (it might be diminishing). Presently hold the switch shut with one hand also, turn the dial on the variable resistor with the other. 
 

At the point when the dial is swung to one side, the resistance in the circuit is low and the LED is splendid on the grounds that a substantial current streams. As you turn the dial to the privilege the resistance increments and the Driven will get to be diminish, generally as compelling the water through a segment of rocks would moderate the water stream and lower the perusing on your water meter. 


You might ponder what the 1kω resistor is doing in the circuit. On the off chance that you set the dial on the variable resistor for least resistance (0ω) then Ohm's Law lets us know the present will be substantial - and it may harm the LED (think about this as a powerful water pump over-burdening a water meter). So the 1kω was placed into farthest point the current while having little impact on the brilliance of the LED.

Presently expel the wire from c14 and interface it to c16. Do you know what will happen now? Close the switch and you will see that as you turn the dial from the left to the privilege the LED goes from exceptionally diminish to splendid (the opposite associated with c14), in light of the fact that you are diminishing the resistance between the middle and right sticks. Presently expel the 1kω resistor from gap j15 and embed it into opening c14 (the flip side remains in j5). What do you think will happen? Close the switch and turn the dial on the variable resistor. The LED is diminishing and turning the resistor dial won't make it any brighter. As examined over, the resistance between the left and right sticks is constantly 50kω and the part demonstrations much the same as one of alternate resistors in your PK-101. 

SCHEMATIC
Variable resistors like this one are utilized as a part of the light dimmers you may have in your home, and are likewise used to control the volume in your radio, your TV, and numerous electronic gadgets. 

Parts Needed:
• 9V battery or power supply
• Switch
• One 1kω resistor (stamped chestnut dark red-gold)
• 50kω variable resistor
• One LED
• 2 wires 

Wiring Checklist (Demonstrates same position as last analyze):
Embed red battery wire or positive power supply into gap j4 also, dark battery wire or negative power supply (ground) into gap (–) 3. Embed switch into gaps f4 and f5. Embed the LED into gaps g20 and g21 ("level" side goes into g21). Embed a short wire between gaps f21 and (–) 21. Embed the 1kω resistor into gaps j5 and j15. Embed the 50kω variable resistor into openings e14, g15, and e16. It might be a tight fit, precisely squeeze it in gradually. Embed a short wire between gaps c14 and j20.
  

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