# potentiometer

1. ### Understanding wiring of On/Off switch + Potentiometer combination

I'm in the process of building a Halloween prop using an old 1970's Sony Trinitron TV, and I was hoping to be able to use the original power switch to power my prop, and use the integrated volume control as a dimmer for my LEDs I'm going to wire to it. (Basically I would like to wire an LCD...
2. ### I can't understand how to translate this into math: potentiometer as voltage divider.

Teacher gave us this circuit to analyze and we're supposed to use the voltage divider formulation: $V_{R1} = \frac{E\cdot R1}{R1+R2+R3}$ It gives me: $V_{R1} = 4.55$ $V_{R1} = 6.69$ $V_{R1} = 3.75$ The problem is, either I don't know how to interpret these numbers, or I'm not...
3. ### "Light touch" rotary encoder/pot

Hello All, I'm making a small Pong clone in hardware and purchased a few 10K pots for the paddle controls. They, unfortunately are a bit stiff to turn quickly, I think it's the friction of the wiper inside. Does anyone have a favorite for a rather "light friction" rotary encoder that would...
4. ### Using potentiometer to adjust volume on usb speaker

So I am currently trying to build a multi-platform portable. I'm using a raspberry pi zero w. I have a USB speaker with its own audio card inside. I am attempting to use a potentiometer to allow volume adjustment. With the soldering points on this speaker board, I am unsure what to attach to the...
5. ### Potentiometer circuit to DC-Dimmer circuit: 3 wire to 4 wire connection?

Looking for a plausible solution to the following problem: Background: 1. Currently - simple potentiometer (linear, 100k Ohm) control that controls an AC motor 2. Motor has a dedicated DC control circuit embedded with the following possible control connection points a). "Low Voltage +10V...
6. ### High Frequency Variable Resistor

Hi, I'm looking for a variable resistor (rheostat) able to operate also with high frequency current. In particular, for my application, the current is sinusoidal with f=100kHz and amplitude of 40A. The range of variable resistance should be 0-200 Ohm and 0-10 kOhm (obviously for higher value...
7. ### PIC- making potentiometer match second potentiometer not working

I'm tryng to make a DC motor into a servo motor. The motor axle has a gear that is in sync with a gear on a potentiometer (MOTORPOT in the code) and I have another potentiometer that works as an input that the motor potentiometer should match in position however I set this pot(CONTROLPOT in...
8. ### Remove Volume Control from Creative Inspire 2400 Speakers

Hello all, I sort of hyjacked another thread so I thought I should start a new one for my problem specifically. I have an old Creative Inspire 2400 2.1 channel speakers for my pc but the volume control pot went out. I opened the volume control and it looks to be a standard 6 pin pot. A wire...