Large Ball-Bearing Differential Pulley, 20/30/40/60mm Steps Science at Home this microphone amplifier connects a

this microphone amplifier connects a microphone input to both an integrated speaker and an oscilloscope-driving amplified signal for waveform study

this 80mm steel needle in a 6mm rod doubles as a precise alignment reference for image-formation and ray-tracing setups

Oscilloscope with feel of Digital touch

Low-noise 220V blower with a detachable 60-inch hose and adjustable flow control

sized for energy-storage demonstrations where stored joules need to discharge through a visible load

Large Ball-Bearing Differential Pulley, 20/30/40/60mm Steps Science at Home this microphone amplifier connects aFour step large ball bearing differential pulley with 20, 30, 40, and 60mm steps at 6. 5 inches overall, mounted on a 0. 75 inch post for attachment to standard rod and clamp stands.