Quantity   Component name
1 × Peltier element Thermoelectric device, also known as a heat-pump. DC current causes one side to get hot while the other gets cold. Capable of up to 70C temperature differential. Supposedly operates at about 10% efficiency.
1 × Controller Probably an arduino with sensors (cheap and easily available): Temperature (ambient, hot-side, cold-side), Humidity (ambient). For power management and scheduling activity during optimum periods
1 × Condensation manifold "bent bit of plastic and aluminium" - This is the tricky bit. There will need to be suitable air through-put to yield adequate moisture, ideally the cool-dry output air will be ducted over the hot-side heat-sink to improve efficiency.
1 × Solar PV power-supply Power-supply to make the device truly portable and off-grid. It would be easier to have this run from the grid, but making it solar will result in it being suitable for austere/impoverished environments, top of sky-scrapers, pot-plants in strange places...
1 × Feature creep LED pathway lights, vibration generator to scare off snakes, ultrasound to scare off rodents... yeah,... feature creep...