A do-it-yourself air compressor

Buscando algo más de info para postear sobre la "Máquina de termoformado" encontre esté artículo! Me pareció sumamente ingenioso! Transcribo parte y dejo el link!

El Link:
http://xoomer.alice.it/ocapofe/compressore-eng.htm

Surely one of the more useful tool in the workshop is the air compressor ; we can find it for everyone's taste and budget, but, as a modeler, we couldn't but consider to build one by ourselves..There certainly are many ways to build one, so our is surely one of the many possible way, and obviously we encourage you to use your own experience in order to better both operations and attractiveness.Our goal was to build a small capacity one, but big enough for our applications, by means of junk materials and components so to reduce the cost and the weight, to easy its transportability wherever needed, and, most of all, to reuse all those scraps that everyone of us has forgotten in a drawer, in order to minimize the number of brand new parts.Fridge's compressors are particularly good at this scope, by having enough power, reduced overall dimensions, extremely low noise and, of course, a very low price. In our country we can easily find them by junk dealers almost for free.

Material List
Scrap fridge compressor
Fire estinguisher, gas bottle or heating circuit expansion tank
600mm (24") long galvanized steel tube, dia. 20mm (3/4")
2 galvanized steel square tube pcs 25 x 25 mm (1"x1"), 160 mm (6") long
each
2 iron plates 100 x 20 x 3 mm (4" x 3/4" x 1/8")
1 connection (20 mm (3/4") dia.) to be brazed to the tank
A 3/4" to 1/4" adapter
4 shock-absorbing grommets (scrap from doorstoppers)
Electric cable, 2 m. (80")
1 male plug
1 teflon roll for water circuit sealing
L or T-joints for hydraulic applications (qty depending on numbers of accessories and mounting type)
Male/female adapters for hydraulic applications for joints connection
Pressure switch or safety valve
Manometer
Pressure controller
Ball valve for pneumatic applications
Compressed air tubing and relevant joints
Various bolts