- #1
GPT
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Hello all,
I'm attempting to create a dimmer circuit for some lights Id like to install in my room. I've attached the diagram below.
Heres the problem: When I increase the resistance of potentiometer 2, for example, to decrease the current lamp 2 receives (thus dimming the lamp) the other lamps brighten. I want the other lamps to maintain their luminous output at a constant level dependant upon the amount of resistance of their respective pots.
Bear with me (this is my first circuit) but I don't understand why this is happening.
Two Questions
1) If the resistances of all the other pots remain the same, the same amount of current should flow through them, no? Why are they getting more current?
2) What are potential solutions to this problem?
Thanks for your help
Glenn
Edit:
Here are the parts I'm using on the breadboard:
-12v battery; 12v, 60mA mini indicator lamps; 10k ohm, .5W pot; 300ohm, .5W resistor in series with lamp and pot
These are the parts Id like to use in the finished circuit:
-12v transformer (wired to mains); 12v, 35W MR16 halogen lamps, appropriate pots and resistors
I'm attempting to create a dimmer circuit for some lights Id like to install in my room. I've attached the diagram below.
Heres the problem: When I increase the resistance of potentiometer 2, for example, to decrease the current lamp 2 receives (thus dimming the lamp) the other lamps brighten. I want the other lamps to maintain their luminous output at a constant level dependant upon the amount of resistance of their respective pots.
Bear with me (this is my first circuit) but I don't understand why this is happening.
Two Questions
1) If the resistances of all the other pots remain the same, the same amount of current should flow through them, no? Why are they getting more current?
2) What are potential solutions to this problem?
Thanks for your help
Glenn
Edit:
Here are the parts I'm using on the breadboard:
-12v battery; 12v, 60mA mini indicator lamps; 10k ohm, .5W pot; 300ohm, .5W resistor in series with lamp and pot
These are the parts Id like to use in the finished circuit:
-12v transformer (wired to mains); 12v, 35W MR16 halogen lamps, appropriate pots and resistors
Attachments
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