I have two potentiometers one says A47-10K-s (assuming this is a 10k max potentiometer) and one that says A250K (assuming this is 0min - 250k max)
Quote from: hilukasz on Mar 30, 2012, 05:16 pmI have two potentiometers one says A47-10K-s (assuming this is a 10k max potentiometer) and one that says A250K (assuming this is 0min - 250k max)Instead of assuming, why don't you check them with your multimeter, first? If you don't have a multimeter, you -NEED- to get one, and get familiar with using it.
Either will work adequately for feeding an Arduino analog input. What's more important is whether they are linear or log-law pots. Linear is better for this application.
Hook one side of the pot to 5V, the other to ground, and connect you multimeter on voltage setting across the centre wiper pin and ground. Turn the rotor on the pot whilst you monitor the voltage, one end it will be 0 (or close to it) ant the other end it will be 5V (or close to it). A linear should read close to 2.5 volts at the centre position and give a smooth transition from one to the other as you turn the knob. A logarithmic will have 'most of it' at one end of the rotation and 2.5 volts will be close to one end of the scale. Most pots are linear.......Jumper leads with croc clips at either end make life a lot easier when you're doing this.
you have any suggestions for learning? I picked up a book that mentions some basics, but its more for openFrameworks/processing than electronics.