AC/DC Power Supply Controller for Ripple Tank, Variable DC and Fixed AC Pack Size_7 with adjustable slit and draw-out

with adjustable slit and draw-out focusing for examining the spectral composition of light sources

adjustable via motor voltage to mimic temperature and float weight to mimic pressure

Hand-painted 4-part human brain model separates into cortical hemispheres and brain-stem regions for lobed-anatomy teaching at introductory biology levels

Pocket-sized 45mm aluminum compass with a graduated dial

AC/DC Power Supply Controller for Ripple Tank, Variable DC and Fixed AC Pack Size_7 with adjustable slit and draw-outTwo variable 0 to 6V DC outputs paired with two fixed 6V 10W and 12V 20W AC outputs on this power supply controller, sized for ripple tank and bulb driven physics demonstrations.