Yup, some plywood, some foil faced foam board, some dowel rods, or old pieces of arrows (they work as shelves if you're just drying stuff), a 1X6 with a few ceramic light fixtures, and a dimmer switch. There's several plans you can look up. Bore a hole on each end (lower on one end, higher on the other) and make a simple sheet metal flap to slide over the hole for air flow control. I hooked up one of those home weather stations to mine, so I had an idea of the temp and humidity inside.
You can dry staves, slats, warm laminations, dry bamboo, etc.