Howdy--
I'm building an activity for a physics class that will create standing waves on a string. I intend to use a push-pull solenoid (amazon link) that can be driven with 9-24 V, consumes ~100mA at peak, and has a coil resistance of 43 ohms. I would like the driving sine wave signal to come from the audio jacks of the student's cell phones (link to an app for that). What would be a good solution for an amplifier? (I'm all ears if anyone wants to critique my choice of solenoid as well, or anything else about the idea)
Thanks in advance!
I'm building an activity for a physics class that will create standing waves on a string. I intend to use a push-pull solenoid (amazon link) that can be driven with 9-24 V, consumes ~100mA at peak, and has a coil resistance of 43 ohms. I would like the driving sine wave signal to come from the audio jacks of the student's cell phones (link to an app for that). What would be a good solution for an amplifier? (I'm all ears if anyone wants to critique my choice of solenoid as well, or anything else about the idea)
Thanks in advance!